CN109784003A - A kind of optimum organization method based on when repairing horizontal well tubing string - Google Patents
A kind of optimum organization method based on when repairing horizontal well tubing string Download PDFInfo
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- CN109784003A CN109784003A CN201910237322.0A CN201910237322A CN109784003A CN 109784003 A CN109784003 A CN 109784003A CN 201910237322 A CN201910237322 A CN 201910237322A CN 109784003 A CN109784003 A CN 109784003A
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Abstract
The present invention relates to a kind of optimum organization methods based on when repairing horizontal well tubing string；Belong to petroleum, natural gas extraction drilling technology field.It is best proportion relationship that the optimum organization method, which has determined that tool string connects when more weight reconnect that weight is spent compared with the depth of setting of Big Inch to hole angle A in the well workover pipe string that more weight are formed compared with Big Inch compared with little oil pipe, and then existing well workover pipe string is made to reach best setting ability, to provide fundamental basis for well workover pipe string combination, the needs of enterprise's production and application are met.
Description
Technical field
The present invention relates to a kind of optimum organization methods based on when repairing horizontal well tubing string；Belong to oil well repairing operation tubing string group
Conjunction field.
Background technique
With the development of horizontal well integration capability and technology, long horizontal sections horizontal well is used in oil field and is gradually increased,
Its water hangs down than increasing, and horizontal section length is increasingly longer；At the scene in operation process, well workover pipe string is often lowered into well by people
Cylinder horizontal segment carries out workover treatment.Well workover pipe string in the wellbore under fashionable generally rely on self weight as power, when tripping in inclination section
When, with the increase of hole angle, well workover pipe string gradually starts to be close to pit shaft, down toward horizontal segment until lying on pit shaft completely.It passes
The well workover pipe string of system connects more weight by tool string and forms compared with little oil pipe；Well workover pipe string is gradually during tripping in, with tripping in
The increase of depth is also incrementally increased with the contact area of pit shaft, is incrementally increased so as to cause its frictional resistance；And then lead to well workover pipe
When column tripping in horizontal segment certain depth, it is difficult to continue tripping in by well workover pipe string own wt, so as to cause well workover pipe string
The inadequate problem of depth of setting happens occasionally.In order to solve this problem, existing well workover pipe string connects more weights by tool string
Amount compared with reconnected after little oil pipe more weight compared with Big Inch form；It is by way of increasing well workover pipe string own wt, enhancing
Its setting ability solves the problems, such as that traditional well workover pipe string tripping in is difficult to a certain extent；But existing well workover pipe string due to
Weight, compared with the proportionate relationship between Big Inch, is rule of thumb obtaining by construction personnel, has no compared with little oil pipe and weight
Theoretical basis；Therefore, it is necessary to develop a kind of optimum organization methods, to instruct the construction of front-line workers.
Summary of the invention
Present invention aims at: a kind of optimum organization method based on when repairing horizontal well tubing string is provided, for well workover pipe string
Combination is provided fundamental basis, to obtain weight compared with little oil pipe and weight compared with the best proportion relationship between Big Inch, and then is made
Existing well workover pipe string reaches best setting ability.
The technical scheme is that
A kind of optimum organization method based on when repairing horizontal well tubing string, it is characterised in that: described should be based on when repairing horizontal well pipe
The optimum organization method of column comprises the following steps:
(1), the foundation of when repairing horizontal well tubing string LOAD FOR model；
Choosing mean level well is entirely partially research object from well head to shaft bottom, and the well workover pipe string in pit shaft is mainly by tool string
More weight are connected compared with more weight are reconnected after little oil pipe compared with Big Inch composition, now draw well workover pipe string along wellbore axial direction
It is divided into four sections of vertical section, inclination section, horizontal segment and operation front end to be studied, if being provided on the corresponding pit shaft of well workover pipe string
N well track measuring point；And a continuous micro_element section is regarded as in the part between the measuring point of adjacent wellbores track, then well workover pipe string
N-1 infinitesimal section can be separated into；
Do following hypothesis first before modeling: 1) well workover pipe string is in linear elastic deformation state；2) well workover pipe string is in horizontal well
Horizontal segment be considered as and contacted with pit shaft continuity, and ignore the bending deformation that tool string generates at maximum gauge；3) well workover pipe
The axis of column and the axis of well track are consistent；4) well workover pipe string uses coefficient of friction fitting process meter in each well section coefficient of friction
It calculates；5) dynamic load is little in well workover pipe string, can omit；6) well workover pipe string stressing influence of the temperature change of well workover pipe string to this research
Less；The foundation of horizontal well well workover pipe string LOAD FOR model comprises the steps of: under assumed condition
A, workover fluid and well workover pipe string transactional analysis:
In actual production operation, due to having in pit shaft and workover fluid in well workover pipe string, when well workover pipe string above mention or under
Fashionable workover fluid can generate along journey flow resistance and viscous resistance well workover pipe string, therefore in view of above-mentioned each influence is to well workover pipe
The workover fluid frictional resistance of column is modified as follows:
Wherein:
The workover fluid frictional resistance of well workover pipe string, N；
Viscous resistance suffered by well workover pipe string, N；
Along journey flow resistance, N suffered by well workover pipe string；
Well workover pipe string outer diameter, mm；
Well workover pipe string internal diameter, mm；
Borehole diameter, mm；
Well depth, m；
Workover fluid yield value, Pa；
Well workover fluid viscosity, mPa ﹒ s；
Workover fluid apparent viscosity, mPa ﹒ s；
Workover fluid speed, m/s；
Workover fluid dynamic viscosity, mPa ﹒ s；
Acceleration of gravity, N/kg；
B, vertical section well workover pipe string force analysis:
Since well workover pipe string contacts with pit shaft in vertical well section smaller, assert that well workover pipe string rubs vertical well section is contactless
Resistance, and only acted on by buoyant weight, along journey flow resistance and viscous resistance, calculating vertical section well workover pipe string contact frictional resistance at this time is 0, axis
Power is well workover pipe string buoyant weight, i.e.,
Line weight of the well workover pipe string in workover fluid, N/m；
Well workover pipe string infinitesimal segment length, m；
Axle power suffered by well workover pipe string, N；
Well workover pipe string contacts suffered frictional resistance, N with pit shaft；
C, inclination section well workover pipe string force analysis:
Inclination section well workover pipe string infinitesimal section is taken, force analysis is carried out, well workover pipe string contacts after being lowered into inclination section with pit shaft
Shi Yinwei well workover pipe string gravity and generate frictional resistance, while being carried pulling force and wellbore support by hook in well workover pipe string tripping in workover treatment
Power considers further that under different well workover operating conditions, different workover fluid viscous resistances, along the influence of the parameters such as journey flow resistance, buoyant weight, at this time
Mechanical balance equation and moment of flexure equilibrium equation of the well workover pipe string in inclination section are as follows:
Solution formula, obtains:
In formula:
,
Support force of the pit shaft to well workover pipe string after considering buoyancy, N；When take "+",When take "-"；
Axial force suffered by well workover pipe string infinitesimal section lower surface, N；
、Hole angle on well workover pipe string infinitesimal section section, °；
The coefficient of friction of well workover pipe string and pit shaft；
、The shearing force of well workover pipe string two sections, N；
,Moment of flexure on well workover pipe string infinitesimal section section, N ﹒ m；
Inclination section radius of curvature, m.
、、、Transition parameter；
D, net horizontal section well workover pipe string force analysis
It is contacted according to well track, well workover pipe string with pit shaft and loading characteristic considers well workover pipe string buoyant weight and workover fluid along well workover
In tubing string, when outer flowing along journey flow resistance and viscous resistance, mechanical balance equation of the well workover pipe string in horizontal segment at this time are as follows:
In formula:
The synthesis frictional resistance of well workover pipe string and pit shaft, N；
E, the tool string Analysis on Mechanics Model of well workover pipe string operation front end；
The tool string of well workover pipe string operation front end is divided into two parts and is calculated, a part be screw rod tool nose tool, one
It is divided into screw rod tool rear portion tool；Screw rod tool nose tool consider tubing string rotation and pit shaft and milling object generate drag and torque and
The influence of pressure, screw rod tool rear portion tool consider that tubing string is contacted with pit shaft continuity and generate frictional resistance；Well workover pipe string operation at this time
The tool string mechanical balance equation of front end are as follows:
,Torque on well workover pipe string section, N ﹒ m；
Well workover pipe string infinitesimal section radius, °；
So far obtain when repairing horizontal well tubing string contacted according to well track, well workover pipe string with pit shaft and loading characteristic consider well workover pipe
The water established along journey flow resistance and viscous resistance of column self weight, workover fluid buoyancy and workover fluid along tubing string, when outer flowing
Horizontal well well workover pipe string LOAD FOR model；
(2), analog simulation is carried out by " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；
The when repairing horizontal well tubing string LOAD FOR model obtained based on step (1)；" water is worked out using interpolation algorithm and iterative algorithm
Horizontal well bores mill tubing string LOAD FOR and dynamic simulation system " software；" Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
The copyright number of accepting of system " software is 2019R11S0139560；Utilize " Horizontal Well Drilling mill tubing string LOAD FOR and dynamic simulation
Steps are as follows for the analog simulation of system " software:
A, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；Horizontal well wellbore is imported with Excel table
Track data, generate corresponding " well depth ", " hole angle " " azimuth " and draws out well track figure, wellbore is calculated
The vertical depth and maximum horizontal displacement of track；
B, click main menu on " basic operation " button, pop up " basic parameter setting " interface, can to " comprehensive parameters setting ",
" temperature parameter setting ", " pressure parameter setting " are configured, and successively by pit shaft internal-and external diameter, weight is larger compared with little oil pipe and weight
The internal-and external diameter of oil pipe, oil pipe density, workover fluid specific heat, workover fluid discharge capacity, workover fluid density, screw rod power, screw rod nominal torque,
The rigid grade of cumulative operation time, oil pipe, the rigid grade of casing, workover fluid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover
Pump pressure parameter is loaded into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirms errorless rear click " really
It is fixed " button, main interface is returned to, this completes the settings of the basic parameter of well workover pipe string；
C, " tool string design " button on main menu is clicked, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
System " software " tool string design " interface, carries out tool string combination according to different operating conditions in the toolbar of left side, according to tripping in sequence
Simultaneously its depth of setting is arranged in select tools, successively clicks " addition " button, shows its parameter in tool string table above；If needing
Relevant parameter is modified, then can click directly on " deletion " button, it can be to weight compared with little oil pipe and weight in right side " oil pipe combination "
Depth of setting compared with Big Inch is configured；After being provided with, " preservation " button is clicked, the parameter set is can be reserved for and generates newly
Text；The Import button can be clicked directly on when subsequent operation, the parameter set before importing；Confirm errorless rear click " really
It is fixed " button, main interface is returned to, this completes the Combination Designs of well workover pipe string；
D, " passability analysis " button on main menu is clicked, pop-up " passability analysis " interface is clicked " setting ability calculating " and pressed
Button, chart, which is fallen into a trap, on the left of " passability analysis " interface calculates radius of curvature parameter, obtains minimum profile curvature radius, right side chart numbers
According to display well workover pipe string combination, calculates single well workover pipe string maximum and pass through length and carry out judging that can well workover pipe string pass through；
" generating report " button is clicked, blank space obtains analysis result above；Confirm errorless rear click " determination " button, returns to main boundary
Face carries out the different operating condition tubing strings analysis of next stage；
E, based on boring under mill well workover operating condition, according to the designed tool string in front " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic
Selection " boring the analysis of mill tubing string " button, carries out respectively into " boring the analysis of mill tubing string " interface in state analogue system " software main interface
Well workover pipe string LOAD FOR obtains frictional resistance and hook load during the tripping in of entire well workover pipe string；And on " boring the analysis of mill tubing string " boundary
It is obtained in left side of face table and corresponds to frictional resistance and hook load numerical value, and obtains frictional resistance and hook load figure line on right side；Click " image guarantor
Deposit " button, can be reserved for the curve generated is jpg format；Simulation analysis needed for completing and image close analysis window after saving, and return
Return main interface；
(3), identical in well workover parameter based on boring mill well workover operating condition, under the different multiple horizontal wells of horizontal well track, to repairing
Well casing column carries out the analog simulation that frictional resistance and hook carry and calculates；
Take pit shaft internal-and external diameter first, weight compared with little oil pipe and weight compared with the internal-and external diameter of Big Inch, oil pipe density, workover fluid specific heat,
Workover fluid discharge capacity, screw rod power, screw rod nominal torque, cumulative operation time, the rigid grade of oil pipe, the rigid grade of casing, is repaired at workover fluid density
Well liquid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover pump pressure parameter (being referred to as well workover parameter) are identical, horizontal
The different multiple horizontal wells of well bore track are studied, and by above-mentioned horizontal well track and well workover parameter, according to step
(2) mode is loaded into respectively in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；
For multiple horizontal wells of different well tracks, for every kind of horizontal well track situation again by well workover pipe string be divided into
Lower three kinds of situations are studied: well workover pipe string connects more weight by tool string and forms compared with little oil pipe；Well workover pipe string is by tool string
It connects more weight and more weight is connected compared with reconnecting more weights after little oil pipe by tool string compared with Big Inch composition and well workover pipe string
Amount is formed compared with Big Inch；
" Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software " tool is then entered according to the mode of step (2)
String design " interface, according to the horizontal well track of different level segment length according to tripping in sequential selection in the toolbar of left side
Simultaneously its depth of setting is arranged in tool, well workover pipe string tool string are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil
Pipe+variable diameter is configured weight compared with little oil pipe depth of setting in right side " oil pipe combination ", not under the larger oil pipe of weight
Enter depth to be configured, such well workover pipe string just connects more weight by tool string and forms compared with little oil pipe；
" leading in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software is carried out further according to the mode of step (2)
The property crossed analysis ", confirmation well workover pipe string can safe tripping in by after inclination section according to the designed tool string in front in " Horizontal Well Drilling
Selection " boring the analysis of mill tubing string " button in mill tubing string LOAD FOR and dynamic simulation system " software main interface, into " brill mill tubing string
Analysis " interface carries out well workover pipe string LOAD FOR, obtains and connects more weight compared with the well workover pipe string that little oil pipe forms by tool string
Frictional resistance and hook during tripping in carry size；
It repeats above-mentioned software analog simulation step and is loaded into different multiple horizontal well tracks and identical well workover parameter, in " water
According to different water in toolbar on the left of horizontal well brill mill tubing string LOAD FOR and dynamic simulation system " software " tool string design " interface
The horizontal well track of flat segment length is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string
Are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with
Big Inch depth of setting is configured, and the depth of setting to weight compared with little oil pipe is not configured, and such well workover pipe string is just by work
Tool series winding connects more weight and forms compared with Big Inch；
Then " the passability analysis " in progress " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirmation
The safe tripping in of well workover pipe string energy is by inclination section, later according to the designed tool string in front in " Horizontal Well Drilling mill tubing string load
Selection " boring the analysis of mill tubing string " button in calculating and dynamic simulation system " software main interface, into " analysis of brill mill tubing string " interface
Well workover pipe string LOAD FOR is carried out, obtains and well workover pipe string that more weight are formed compared with Big Inch is connected in tripping in process by tool string
In frictional resistance and hook carry size；
It repeats above-mentioned software analog simulation step and is loaded into different multiple horizontal well tracks and identical well workover parameter, in " water
According to different water in toolbar on the left of horizontal well brill mill tubing string LOAD FOR and dynamic simulation system " software " tool string design " interface
The horizontal well track of flat segment length is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string
Are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with
Little oil pipe and weight are configured compared with the depth of setting of Big Inch, and it is smaller that such well workover pipe string just connects more weight by tool string
Oil pipe reconnects more weight and forms compared with Big Inch, and then in progress, " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
" passability analysis " in system " software, the safe tripping in of confirmation well workover pipe string energy are designed according to front later by inclination section
Tool string selection " boring the analysis of mill tubing string " in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software main interface
Button carries out well workover pipe string LOAD FOR into " boring the analysis of mill tubing string " interface；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 500m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；By taking well workover parameter
Identical, the different multiple horizontal wells of horizontal well track are studied, and well workover pipe string is in different weight compared with little oil pipe and weight
Size, which is carried, compared with frictional resistance of the well workover pipe string under the proportionate relationship between Big Inch during tripping in and hook calculates discovery with weight
Ratio length compared with entire well workover pipe string shared by Big Inch increases, and entire well workover pipe string is lowered into frictional resistance and hook when bottom hole location
Load increases accordingly；When weight reaches inclination section value compared with the ratio length of entire well workover pipe string shared by Big Inch, the increasing of frictional resistance
Long rate starts to increase, and hook, which carries, to be reduced, but the increase tendency of frictional resistance is steeper, and the reduction trend that hook carries is relatively slow；Therefore well workover pipe string
Variation critical condition of the weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch in inclination section；
In conjunction with above-mentioned research, made compared with little oil pipe and weight compared with the proportionate relationship between Big Inch for the weight of well workover pipe string
Oblique section specific location carries out sunykatuib analysis, is loaded into a bite horizontal well track and well workover parameter according to the mode of step (2)
Into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, then in " Horizontal Well Drilling mill tubing string LOAD FOR
With dynamic simulation system " horizontal well wellbore on the left of software " tool string design " interface in toolbar according to different level segment length
Track is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string are as follows: flat-bottom grind shoes+connector+level
Well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with little oil pipe and weight compared with Big Inch
Depth of setting is configured, and such well workover pipe string just connects more weight by tool string, and compared with little oil pipe to reconnect more weight larger
Oil pipe forms, then " the passability point in progress " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software
Analysis ", the safe tripping in of confirmation well workover pipe string energy is by inclination section, later according to the designed tool string in front in " Horizontal Well Drilling mill
Selection " boring the analysis of mill tubing string " button in tubing string LOAD FOR and dynamic simulation system " software main interface, into " brill mill tubing string point
Analysis " interface carries out well workover pipe string LOAD FOR；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 250m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；In weight compared with Big Inch
Change depth of setting of the weight compared with Big Inch by depth of setting increment of 50m when ratio length reaches inclination section, reduce weight compared with
The depth of setting of little oil pipe, by well workover pipe string in different weight compared with little oil pipe and weight compared under the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in carry size and calculate discovery；It is wherein deep in the tripping in for not changing entire well workover pipe string
When spending, when weight can be lowered into hole angle A degree well depth compared with Big Inch proportion length, when well workover pipe string is lowered into shaft bottom
Hook carry maximum, while connecting more weight compared to tool string and connecting more weight compared with Big Inch group compared with little oil pipe or tool string
At well workover pipe string, it is also maximum that hook when being lowered into shaft bottom, which carries,；
(4) based on mill well workover operating condition is bored, the best setting ability of well workover pipe string is analyzed；
Suffered hook, which is carried, during well workover pipe string tripping in thinks that well workover pipe string can be with tripping in greater than 0, well workover pipe string after hook is carried less than 0
It then can not tripping in；Therefore, it is the basis for studying well workover pipe string depth of setting that hook, which carries,；By taking certain horizontal well track as an example, it is assumed that
Horizontal segment indefinite extension in one direction carries out simulation by software in the combination of identical tool string and well workover parameter and divides
Analysis can know the maximum depth of setting of well workover pipe string by judge whether hook load is 0；
In order to study when not changing the depth of setting of entire well workover pipe string；More weight are connected by tool string to connect again compared with little oil pipe
Hole angle A degree can be lowered into compared with Big Inch proportion length in weight compared with the well workover pipe string that Big Inch forms by connecing more weight
Under proportionate relationship when well depth comparison by tool string connect more weight compared with the well workover pipe string of little oil pipe or connection more weight compared with
It is more compared with little oil pipe reconnection to judge whether that tool string connects more weight for the maximum depth of setting of the well workover pipe string of Big Inch composition
Root weight can be lowered into hole angle A degree well depth compared with Big Inch proportion length in weight compared with the well workover pipe string that Big Inch forms
When setting ability it is best；
Based on step (3) it is obtained more weight connected by tool string reconnect more weight compared with little oil pipe formed compared with Big Inch
Well workover pipe string connect well workover pipe string that more weight are formed compared with little oil pipe with tool string or tool string to connect more weight larger
Frictional resistance and hook of the well workover pipe string of oil pipe composition during tripping in carry size, it can be determined that go out the depth of well workover pipe string；
It is repaired to further verify to connect more weight by tool string and reconnect more weight compared with little oil pipe compared with what Big Inch formed
Well casing column connect more weight compared with little oil pipe with by tool string when weight is compared with the well depth that Big Inch ratio length is hole angle A degree
It is best compared to its setting ability compared with the well workover pipe string that Big Inch forms that the well workover pipe string or tool string of composition connect more weight；
By taking certain horizontal well track as an example, it is assumed that horizontal segment indefinite extension in one direction, in the combination of identical tool string and well workover
In the case of parameter in the way of step (2) by software carry out sunykatuib analysis discovery using by tool string connect more weight compared with
Little oil pipe reconnects more weight compared with the well workover pipe string tripping in that Big Inch forms, and wherein weight is lowered into hole deviation compared with Big Inch front end
When the A degree well depth of angle, more weight are connected compared to tool string and connect more weight compared with Big Inch composition compared with little oil pipe or tool string
Well workover pipe string, depth of setting is maximum, and setting ability is best；Wherein tool string connects well workover pipe string of the more weight compared with Big Inch
Setting ability than tool string to connect more weight poor compared with the well workover pipe string setting ability of little oil pipe；
(5) application method is as follows；
Into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；A bite Horizontal Well is imported with Excel table
The track data of eye generates corresponding " well depth ", and " hole angle " " azimuth " and draws out well track figure, well is calculated
The vertical depth and maximum horizontal displacement of eye track；
Click main menu on " basic operation " button, pop up " basic parameter setting " interface, can to " comprehensive parameters setting ",
" temperature parameter setting ", " pressure parameter setting " are configured, and successively by pit shaft internal-and external diameter, weight is larger compared with little oil pipe and weight
The internal-and external diameter of oil pipe, oil pipe density, workover fluid specific heat, workover fluid discharge capacity, workover fluid density, screw rod power, screw rod nominal torque,
The rigid grade of cumulative operation time, oil pipe, the rigid grade of casing, workover fluid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover
Pump pressure parameter is loaded into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirms errorless rear click " really
It is fixed " button, main interface is returned to, this completes the settings of the basic parameter of well workover pipe string；
" tool string design " button on main menu is clicked, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system "
Software " tool string design " interface carries out tool string combination according to different operating conditions in the toolbar of left side, selects according to tripping in sequence
It selects tool and its depth of setting is set, well workover pipe string tool string are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+
Oil pipe+variable diameter successively clicks " addition " button, shows its parameter in tool string table above；If relevant parameter need to be modified,
" deletion " button can be clicked directly on, it can tripping in weight compared with little oil pipe and weight compared with Big Inch in right side " oil pipe combination "
Depth is configured；Well workover pipe string just connects more weight by tool string and reconnects compared with little oil pipe mostly with weight compared with Big Inch in this way
Composition after being provided with, confirms errorless rear click " determination " button, returns to main interface, this completes the groups of well workover pipe string
Close design；
" passability analysis " button on main menu is clicked, pop-up " passability analysis " interface is clicked " setting ability calculating " and pressed
Button, chart, which is fallen into a trap, on the left of " passability analysis " interface calculates radius of curvature parameter, obtains minimum profile curvature radius, right side chart numbers
According to display well workover pipe string combination, calculates single well workover pipe string maximum and pass through length and carry out judging that can well workover pipe string pass through；
" generating report " button is clicked, blank space obtains analysis result above；Confirm errorless rear click " determination " button, returns to main boundary
Face carries out the different operating condition tubing strings analysis of next stage；
It is ground under well workover operating condition based on boring, according to the designed tool string in front in " Horizontal Well Drilling mill tubing string LOAD FOR and dynamic
Selection " boring the analysis of mill tubing string " button, is repaired respectively into " boring the analysis of mill tubing string " interface in analogue system " software main interface
Well casing column load calculates, and obtains frictional resistance and hook load size during the tripping in of entire well workover pipe string；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 250m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；In weight compared with Big Inch
Change depth of setting of the weight compared with Big Inch by depth of setting increment of 50m when ratio length reaches inclination section, reduce weight compared with
The depth of setting of little oil pipe, by well workover pipe string in different weight compared with little oil pipe and weight compared under the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in carry size and calculate discovery when weight can be following compared with Big Inch proportion length
When entering to hole angle A degree well depth, hook when well workover pipe string is lowered into shaft bottom carry it is maximum, compared to tool string connect more weight compared with
Little oil pipe or tool string connect more weight compared with the well workover pipe string that Big Inch forms, and it is also maximum that hook when being lowered into shaft bottom, which carries,；
It is carried according to hook suffered during well workover pipe string tripping in and thinks that well workover pipe string can be with tripping in greater than 0, well workover pipe string after hook is carried less than 0
It then can not tripping in；Therefore, tool string connects more weight and reconnects more weight compared with the well workover pipe that Big Inch forms compared with little oil pipe
When wherein weight is lowered into hole angle A degree well depth compared with Big Inch front end, it is smaller to connect more weight compared to tool string for column tripping in
Oil pipe or tool string connect more weight compared with the well workover pipe string that Big Inch forms, and depth of setting is maximum, and setting ability is best, so
When not changing the depth of setting of entire well workover pipe string, tool string connects more weight, and compared with little oil pipe to reconnect more weight larger
The well workover pipe string of oil pipe composition, the combination of well workover pipe string when wherein weight is lowered into hole angle A degree well depth compared with Big Inch front end
It is optimal；Length of the weight compared with the specific length of Big Inch and weight compared with little oil pipe so can be obtained, to obtain between them
Proportionate relationship.
The beneficial effects of the present invention are:
The optimum organization method of the when repairing horizontal well tubing string has been determined when not changing the depth of setting of entire well workover pipe string, by work
Tool series winding connects more weight and reconnects in the well workover pipe string that more weight are formed compared with Big Inch compared with little oil pipe with the larger oil of weight
The ratio length of the shared entire well workover pipe string of pipe increases, and tripping in hook load also increases accordingly, when weight is long compared with Big Inch proportion
When degree is more than that hole angle A degree corresponds to the length of well depth, the growth rate of frictional resistance increases, and tripping in hook, which carries, to be reduced.The great oil pipe of line at this time
Increased length will become the obstruction of tubing string setting ability, Gu weight is not shared well workover pipe string compared with Big Inch in well workover pipe string
Ratio length is the bigger the better.Wherein weight is less than hole angle A compared with Big Inch depth of setting and spends when ratio by tool in well workover pipe string
Series winding connects more weight and connects more weight compared with the well workover that Big Inch forms with by tool string compared with the well workover pipe string that little oil pipe forms
Tubing string setting ability is more excellent, repairs when connecting more weight by tool string and reconnecting more weight compared with little oil pipe compared with what Big Inch formed
It is best proportion relationship when weight is spent compared with the depth of setting of Big Inch to hole angle A in well casing column, and then makes existing well workover pipe string
Reach best setting ability, to provide fundamental basis for well workover pipe string combination, meets the needs of enterprise's production and application.
Detailed description of the invention
Fig. 1 is well workover pipe string structure chart of the invention；
Fig. 2 is X1 horizontal well track figure of the invention；
Fig. 3 is of the invention by tool string to connect more 2-7/8 oil pipes to reconnect the well workover pipe string that more 3-1/2 oil pipes form every
The hook that the primary proportionate relationship changed between 2-7/8 oil pipe and 3-1/2 oil pipe reaches shaft bottom carries calculated result figure；
Fig. 4 is of the invention by tool string to connect more 2-7/8 oil pipes to reconnect the well workover pipe string that more 3-1/2 oil pipes form every
When primary change 3-1/2 oil pipe proportion length can be lowered into different hole angles, the hook that well workover pipe string reaches shaft bottom carries meter
Calculate result figure.
Specific embodiment
The optimum organization method based on when repairing horizontal well tubing string comprises the following steps:
(1), the foundation of when repairing horizontal well tubing string LOAD FOR model；
Choosing horizontal well is entirely partially research object from well head to shaft bottom, and the well workover pipe string in pit shaft is mainly connected by tool string
More weight compared with reconnected after little oil pipe more weight compared with Big Inch form (referring to Figure of description 1), now by well workover pipe string edge
Wellbore axial direction is divided into four sections of vertical section, inclination section, horizontal segment and operation front end and is studied (referring to Figure of description
1), because well workover pipe string is influenced by well track, viscous resistance, along factors such as journey flow resistances, different well section well workover pipes
Column force way and stress condition difference；Therefore, different well section well workover pipe string force way and stress condition are studied, is that research is repaired
The most fundamental part of well casing column optimum organization；If being provided with n well track measuring point on the corresponding pit shaft of well workover pipe string；And handle
Part between the measuring point of adjacent wellbores track regards a continuous micro_element section as, then well workover pipe string can be separated into n-1 infinitesimal
Section, can be by carrying out force analysis to each well workover pipe string infinitesimal section, and the influence of superimposed load exists so as to find out well workover pipe string
Frictional resistance and hook carry during tripping in.
Do following hypothesis first before modeling: 1) well workover pipe string is in linear elastic deformation state；2) well workover pipe string is in water
The horizontal segment of horizontal well is considered as to be contacted with pit shaft continuity, and ignores the bending deformation that tool string generates at maximum gauge；3) it repairs
The axis of well casing column and the axis of well track are consistent；4) well workover pipe string uses coefficient of friction fitting process in each well section coefficient of friction
It calculates；5) dynamic load is little in well workover pipe string, can omit；6) well workover pipe string stress shadow of the temperature change of well workover pipe string to this research
It rings little；The foundation of horizontal well well workover pipe string LOAD FOR model comprises the steps of: under assumed condition
A, workover fluid and well workover pipe string transactional analysis:
In actual production operation, due to having in pit shaft and workover fluid in well workover pipe string, when well workover pipe string above mention or under
There can be head loss when fashionable workover fluid is along the tube wall flowing of well workover pipe string, and the head loss is mainly the pipe of well workover pipe string
Wall frictional head loss caused by the frictional resistance of workover fluid, according to the principle of active force and reaction force it is found that workover fluid
Well workover pipe string can be generated along journey flow resistance, during well workover pipe string tripping in, viscid resistance caused by the viscous force of workover fluid
Power can not be ignored, therefore consider that above-mentioned workover fluid influences the workover fluid frictional resistance to well workover pipe string along journey flow resistance and viscous resistance
It is modified as follows:
Wherein:
The workover fluid frictional resistance of well workover pipe string, N；
Viscous resistance suffered by well workover pipe string, N；
Along journey flow resistance, N suffered by well workover pipe string；
Well workover pipe string outer diameter, mm；
Well workover pipe string internal diameter, mm；
Borehole diameter, mm；
Well depth, m；
Workover fluid yield value, Pa；
Well workover fluid viscosity, mPa ﹒ s；
Workover fluid apparent viscosity, mPa ﹒ s；
Workover fluid speed, m/s；
Workover fluid dynamic viscosity, mPa ﹒ s；
Acceleration of gravity, N/kg；
B, vertical section well workover pipe string force analysis:
Since well workover pipe string contacts with pit shaft in vertical well section smaller, assert that well workover pipe string rubs vertical well section is contactless
Resistance, and only acted on by buoyant weight, along journey flow resistance and viscous resistance, calculating vertical section well workover pipe string contact frictional resistance at this time is 0, axis
Power is well workover pipe string buoyant weight, i.e.,
Line weight of the well workover pipe string in workover fluid, N/m；
Well workover pipe string infinitesimal segment length, m；
Axle power suffered by well workover pipe string, N；
Well workover pipe string contacts suffered frictional resistance, N with pit shaft；
C, inclination section well workover pipe string force analysis:
Inclination section well workover pipe string infinitesimal section is taken, force analysis is carried out, well workover pipe string contacts after being lowered into inclination section with pit shaft
Shi Yinwei well workover pipe string gravity and generate frictional resistance, while being carried pulling force and wellbore support by hook in well workover pipe string tripping in workover treatment
Power considers further that under different well workover operating conditions, different workover fluid viscous resistances, along the influence of the parameters such as journey flow resistance, buoyant weight, at this time
Mechanical balance equation and moment of flexure equilibrium equation of the well workover pipe string in inclination section are as follows:
Solution formula, obtains:
In formula:
,
Support force of the pit shaft to well workover pipe string after considering buoyancy, N；When take "+",When take "-"；
Axial force suffered by well workover pipe string infinitesimal section lower surface, N；
、Hole angle on well workover pipe string infinitesimal section section, °；
The coefficient of friction of well workover pipe string and pit shaft；
、The shearing force of well workover pipe string two sections, N；
,Moment of flexure on well workover pipe string infinitesimal section section, N ﹒ m；
Inclination section radius of curvature, m.
、、、Transition parameter；
D, net horizontal section well workover pipe string force analysis
In horizontal segment, with well workover pipe string after being lowered into inclination section, because of well workover pipe string when well workover pipe string and pit shaft contact
Gravity and generate frictional resistance, while pulling force and wellbore support power are carried by hook in well workover pipe string tripping in workover treatment, according to wellbore rail
Mark, well workover pipe string are contacted with pit shaft and loading characteristic consider well workover pipe string buoyant weight and workover fluid along well workover pipe string, outer flowing
When along journey flow resistance and viscous resistance, mechanical balance equation of the well workover pipe string in horizontal segment at this time are as follows:
In formula:
The synthesis frictional resistance of well workover pipe string and pit shaft, N；
E, the tool string Analysis on Mechanics Model of well workover pipe string operation front end；
The tool string of well workover pipe string operation front end is divided into two parts and is calculated, a part be screw rod tool nose tool, one
It is divided into screw rod tool rear portion tool；Screw rod tool nose tool consider tubing string rotation and pit shaft and milling object generate drag and torque and
The influence of pressure, wherein tubing string will receive the tangential frictional resistance effect of pit shaft, which can reduce the torque of screw rod transmitting；Screw rod tool
Rear portion tool consider tubing string contacted with pit shaft continuity generation frictional resistance, with well workover pipe string after being lowered into horizontal segment, well workover
Frictional resistance is generated because of well workover pipe string gravity when tubing string and pit shaft contact, while being carried in well workover pipe string tripping in workover treatment by hook
Pulling force and wellbore support power；Contacted according to well track, well workover pipe string with pit shaft and loading characteristic consider well workover pipe string buoyant weight with
And workover fluid is along well workover pipe string, when outer flowing along journey flow resistance and viscous resistance, the front end of well workover pipe string operation at this time
Tool string mechanical balance equation are as follows:
,Torque on well workover pipe string section, N ﹒ m；
Well workover pipe string infinitesimal section radius, °；
So far obtain when repairing horizontal well tubing string contacted according to well track, well workover pipe string with pit shaft and loading characteristic consider well workover pipe
The water established along journey flow resistance and viscous resistance of column self weight, workover fluid buoyancy and workover fluid along tubing string, when outer flowing
Horizontal well well workover pipe string LOAD FOR model.
(2), analog simulation is carried out by " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；
The when repairing horizontal well tubing string LOAD FOR model obtained based on step (1)；" water is worked out using interpolation algorithm and iterative algorithm
Horizontal well bores mill tubing string LOAD FOR and dynamic simulation system " software；" Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
The copyright number of accepting of system " software is 2019R11S0139560.
The major function of the software are as follows: (1) application software may be implemented to be able to carry out the drafting of horizontal well wellbore trajectory
The assembling of well workover combined string；(2) joined according to well workover pipe string, borehole data, hole trajectory data, basic tool parameter and well workover
Axial force, stress, frictional resistance and hook when number etc. can calculate well workover pipe string workover treatment carry etc., realize to well workover pipe string operation
The dynamic simulative emulation of process observes the variation of well workover pipe string load in operation process；(3) by well workover pipe string intensity into
Row LOAD FOR can realize the setting ability analysis of well workover pipe string.Utilize " Horizontal Well Drilling mill tubing string LOAD FOR and dynamic simulation
Steps are as follows for the analog simulation of system " software:
A, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；Horizontal well wellbore is imported with Excel table
Track data, generate corresponding " well depth ", " hole angle " " azimuth " and draws out well track figure, wellbore is calculated
The vertical depth and maximum horizontal displacement of track；
B, click main menu on " basic operation " button, pop up " basic parameter setting " interface, can to " comprehensive parameters setting ",
" temperature parameter setting ", " pressure parameter setting " are configured, and successively by pit shaft internal-and external diameter, weight is larger compared with little oil pipe and weight
The internal-and external diameter of oil pipe, oil pipe density, workover fluid specific heat, workover fluid discharge capacity, workover fluid density, screw rod power, screw rod nominal torque,
The rigid grade of cumulative operation time, oil pipe, the rigid grade of casing, workover fluid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover
Pump pressure parameter is loaded into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirms errorless rear click " really
It is fixed " button, main interface is returned to, this completes the settings of the basic parameter of well workover pipe string；
C, " tool string design " button on main menu is clicked, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
System " software " tool string design " interface, carries out tool string combination according to different operating conditions in the toolbar of left side, according to tripping in sequence
Simultaneously its depth of setting is arranged in select tools, successively clicks " addition " button, shows its parameter in tool string table above；If needing
Relevant parameter is modified, then can click directly on " deletion " button, it can be to weight compared with little oil pipe and weight in right side " oil pipe combination "
Depth of setting compared with Big Inch is configured；After being provided with, " preservation " button is clicked, the parameter set is can be reserved for and generates newly
Text；The Import button can be clicked directly on when subsequent operation, the parameter set before importing；Confirm errorless rear click " really
It is fixed " button, main interface is returned to, this completes the Combination Designs of well workover pipe string；
D, " passability analysis " button on main menu is clicked, pop-up " passability analysis " interface is clicked " setting ability calculating " and pressed
Button, chart, which is fallen into a trap, on the left of " passability analysis " interface calculates radius of curvature parameter, obtains minimum profile curvature radius, right side chart numbers
According to display well workover pipe string combination, calculates single well workover pipe string maximum and pass through length and carry out judging that can well workover pipe string pass through；
" generating report " button is clicked, blank space obtains analysis result above；Confirm errorless rear click " determination " button, returns to main boundary
Face carries out the different operating condition tubing strings analysis of next stage；
E, based on boring under mill well workover operating condition, according to the designed tool string in front " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic
Selection " boring the analysis of mill tubing string " button, carries out respectively into " boring the analysis of mill tubing string " interface in state analogue system " software main interface
Well workover pipe string LOAD FOR obtains frictional resistance and hook load during the tripping in of entire well workover pipe string；And on " boring the analysis of mill tubing string " boundary
It is obtained in left side of face table and corresponds to frictional resistance and hook load numerical value, and obtains frictional resistance and hook load figure line on right side；Click " image guarantor
Deposit " button, can be reserved for the curve generated is jpg format；Simulation analysis needed for completing and image close analysis window after saving, and return
Return main interface；
(3), identical in well workover parameter based on boring mill well workover operating condition, under the different multiple horizontal wells of horizontal well track, to repairing
Well casing column carries out the analog simulation that frictional resistance and hook carry and calculates；
Initially enter " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；Horizontal Well is imported with Excel table
The track data of eye generates corresponding " well depth ", and " hole angle " " azimuth " and draws out well track figure, well is calculated
The vertical depth and maximum horizontal displacement of eye track；
Click " basic operation " button on main menu again, pop up " basic parameter setting " interface, can to " comprehensive parameters setting ",
" temperature parameter setting ", " pressure parameter setting " are configured, and successively by pit shaft internal-and external diameter, weight is larger compared with little oil pipe and weight
The internal-and external diameter of oil pipe, oil pipe density, workover fluid specific heat, workover fluid discharge capacity, workover fluid density, screw rod power, screw rod nominal torque,
The rigid grade of cumulative operation time, oil pipe, the rigid grade of casing, workover fluid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover
Pump pressure parameter is loaded into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirms errorless rear click " really
It is fixed " button, main interface is returned to, this completes the settings of the basic parameter of well workover pipe string；
For multiple horizontal wells of different well tracks, for every kind of horizontal well track situation again by well workover pipe string be divided into
Lower three kinds of situations are studied: well workover pipe string connects more weight by tool string and forms compared with little oil pipe；Well workover pipe string is by tool string
It connects more weight and more weight is connected compared with reconnecting more weights after little oil pipe by tool string compared with Big Inch composition and well workover pipe string
Amount is formed compared with Big Inch；
" tool string design " button on main menu is then clicked on, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation
System " software " tool string design " interface carries out tool string combination according to different operating conditions in the toolbar of left side, suitable according to tripping in
Simultaneously its depth of setting is arranged in sequence select tools, well workover pipe string tool string are as follows: and flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+
Pipe nipple+oil pipe+variable diameter successively clicks " addition " button, shows its parameter in tool string table above；If related ginseng need to be modified
Number, then can click directly on " deletion " button, in right side " oil pipe combination " can to weight compared with little oil pipe and weight compared with Big Inch
Depth of setting is configured, and is configured to weight compared with little oil pipe depth of setting in right side " oil pipe combination ", not to weight compared with
The depth of setting of Big Inch is configured, and such well workover pipe string just connects more weight by tool string and forms compared with little oil pipe；Setting
After the completion, " preservation " button is clicked, the parameter set is can be reserved for and generates new text；It can click directly on and " lead when subsequent operation
Enter " button, the parameter set before importing；Confirm errorless rear click " determination " button, returns to main interface, this completes
The Combination Design of well workover pipe string；
" passability analysis " button on main menu is clicked again, and pop-up " passability analysis " interface is clicked " setting ability calculating " and pressed
Button, chart, which is fallen into a trap, on the left of " passability analysis " interface calculates radius of curvature parameter, obtains minimum profile curvature radius, right side chart numbers
According to display well workover pipe string combination, calculates single well workover pipe string maximum and pass through length and carry out judging that can well workover pipe string pass through；
" generating report " button is clicked, blank space obtains analysis result above；Confirm errorless rear click " determination " button, returns to main boundary
Face carries out the different operating condition tubing strings analysis of next stage；
According to the designed tool string in front in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software main interface
Middle selection " boring the analysis of mill tubing string " button, carries out well workover pipe string LOAD FOR into " boring the analysis of mill tubing string " interface, obtains by work
Tool series winding connects the frictional resistance and hook load size of well workover pipe string that more weight forms compared with little oil pipe during tripping in；And " boring mill
It is obtained on the left of tubing string analysis " interface in table and corresponds to frictional resistance and hook load numerical value, and obtains frictional resistance and hook load figure line on right side；Point
" image preservation " button is hit, can be reserved for the curve generated is jpg format；Simulation analysis needed for completing and image are closed after saving to be divided
Window is analysed, main interface is returned；
It repeats above-mentioned software analog simulation step and is loaded into different multiple horizontal well tracks and identical well workover parameter, in " water
According to different water in toolbar on the left of horizontal well brill mill tubing string LOAD FOR and dynamic simulation system " software " tool string design " interface
The horizontal well track of flat segment length is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string
Are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with
Big Inch depth of setting is configured, and the depth of setting to weight compared with little oil pipe is not configured, and such well workover pipe string is just by work
Tool series winding connects more weight and forms compared with Big Inch；
Then " the passability analysis " in progress " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirmation
The safe tripping in of well workover pipe string energy is by inclination section, later according to the designed tool string in front in " Horizontal Well Drilling mill tubing string load
Selection " boring the analysis of mill tubing string " button in calculating and dynamic simulation system " software main interface, into " analysis of brill mill tubing string " interface
Well workover pipe string LOAD FOR is carried out, obtains and well workover pipe string that more weight are formed compared with Big Inch is connected in tripping in process by tool string
In frictional resistance and hook carry size；
It repeats above-mentioned software analog simulation step and is loaded into different multiple horizontal well tracks and identical well workover parameter, in " water
According to different water in toolbar on the left of horizontal well brill mill tubing string LOAD FOR and dynamic simulation system " software " tool string design " interface
The horizontal well track of flat segment length is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string
Are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with
Little oil pipe and weight are configured compared with the depth of setting of Big Inch, and it is smaller that such well workover pipe string just connects more weight by tool string
Oil pipe reconnects more weight and forms compared with Big Inch, and then in progress, " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
" passability analysis " in system " software, the safe tripping in of confirmation well workover pipe string energy are designed according to front later by inclination section
Tool string selection " boring the analysis of mill tubing string " in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software main interface
Button carries out well workover pipe string LOAD FOR into " boring the analysis of mill tubing string " interface；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 500m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；By taking well workover parameter
Identical, the different multiple horizontal wells of horizontal well track are studied, and well workover pipe string is in different weight compared with little oil pipe and weight
Size, which is carried, compared with frictional resistance of the well workover pipe string under the proportionate relationship between Big Inch during tripping in and hook calculates discovery with weight
Ratio length compared with entire well workover pipe string shared by Big Inch increases, and entire well workover pipe string is lowered into frictional resistance and hook when bottom hole location
Load increases accordingly；When weight reaches inclination section value compared with the ratio length of entire well workover pipe string shared by Big Inch, the increasing of frictional resistance
Long rate starts to increase, and hook, which carries, to be reduced, but the increase tendency of frictional resistance is steeper, and the reduction trend that hook carries is relatively slow；Therefore well workover pipe string
Variation critical condition of the weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch in inclination section；
In conjunction with above-mentioned research, made compared with little oil pipe and weight compared with the proportionate relationship between Big Inch for the weight of well workover pipe string
Oblique section specific location carries out sunykatuib analysis, is loaded into a bite horizontal well track and well workover parameter according to the mode of step (2)
Into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, then in " Horizontal Well Drilling mill tubing string LOAD FOR
With dynamic simulation system " horizontal well wellbore on the left of software " tool string design " interface in toolbar according to different level segment length
Track is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string are as follows: flat-bottom grind shoes+connector+level
Well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with little oil pipe and weight compared with Big Inch
Depth of setting is configured, and such well workover pipe string just connects more weight by tool string, and compared with little oil pipe to reconnect more weight larger
Oil pipe forms, then " the passability point in progress " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software
Analysis ", the safe tripping in of confirmation well workover pipe string energy is by inclination section, later according to the designed tool string in front in " Horizontal Well Drilling mill
Selection " boring the analysis of mill tubing string " button in tubing string LOAD FOR and dynamic simulation system " software main interface, into " brill mill tubing string point
Analysis " interface carries out well workover pipe string LOAD FOR；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 250m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；In weight compared with Big Inch
Change depth of setting of the weight compared with Big Inch by depth of setting increment of 50m when ratio length reaches inclination section, reduce weight compared with
The depth of setting of little oil pipe, by well workover pipe string in different weight compared with little oil pipe and weight compared under the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in carry size and calculate discovery when not changing the depth of setting of entire well workover pipe string；
When weight can be lowered into hole angle A degree well depth compared with Big Inch proportion length, well workover pipe string is lowered into hook when shaft bottom
Maximum is carried, while connecting more weight compared to tool string and connecting what more weight were formed compared with Big Inch compared with little oil pipe or tool string
Well workover pipe string, it is also maximum that hook when being lowered into shaft bottom, which carries,；
(4) based on mill well workover operating condition is bored, the best setting ability of well workover pipe string is analyzed；
During well workover pipe string tripping in, well workover pipe string can be contacted with pit shaft generates frictional resistance, while in entire pit shaft, well workover pipe string
It is influenced by viscous resistance and along journey flow resistance；If the axial thrust load of tripping in well workover pipe string is greater than its frictional resistance generated, repair
Well casing column can generate a downward axial force, and hook suffered by well workover pipe string, which carries, at this time is greater than 0 and thinks that well workover pipe string can be with
Tripping in, well workover pipe string then can not tripping in after hook is carried less than 0；Therefore, it is the basis for studying well workover pipe string depth of setting that hook, which carries,；With
For certain horizontal well track, it is assumed that horizontal segment indefinite extension in one direction, in the combination of identical tool string and well workover ginseng
Number situations under by software carry out sunykatuib analysis can by judge hook carry whether be 0 come know well workover pipe string maximum tripping in depth
Degree；
In order to study when not changing the depth of setting of entire well workover pipe string；More weight are connected by tool string to connect again compared with little oil pipe
Hole angle A degree can be lowered into compared with Big Inch proportion length in weight compared with the well workover pipe string that Big Inch forms by connecing more weight
Under proportionate relationship when well depth comparison by tool string connect more weight compared with the well workover pipe string of little oil pipe or connection more weight compared with
It is more compared with little oil pipe reconnection to judge whether that tool string connects more weight for the maximum depth of setting of the well workover pipe string of Big Inch composition
Root weight can be lowered into hole angle A degree well depth compared with Big Inch proportion length in weight compared with the well workover pipe string that Big Inch forms
When setting ability it is best；
Based on step (3) it is obtained more weight connected by tool string reconnect more weight compared with little oil pipe formed compared with Big Inch
Well workover pipe string connect well workover pipe string that more weight are formed compared with little oil pipe with tool string or tool string to connect more weight larger
Frictional resistance and hook of the well workover pipe string of oil pipe composition during tripping in carry size, it can be determined that go out the depth of well workover pipe string；
It is repaired to further verify to connect more weight by tool string and reconnect more weight compared with little oil pipe compared with what Big Inch formed
Well casing column connect more weight compared with little oil pipe with by tool string when weight is compared with the well depth that Big Inch ratio length is hole angle A degree
It is best compared to its setting ability compared with the well workover pipe string that Big Inch forms that the well workover pipe string or tool string of composition connect more weight；
By taking certain horizontal well track as an example, it is assumed that horizontal segment indefinite extension in one direction, in the combination of identical tool string and well workover
Sunykatuib analysis discovery is carried out in the tripping in for not changing entire well workover pipe string by software in the way of step (2) in the case of parameter
When depth；It is reconnected under the well workover pipe string that more weight are formed compared with Big Inch using more weight are connected by tool string compared with little oil pipe
Enter, when wherein weight is lowered into hole angle A degree well depth compared with Big Inch front end, connects more weight compared with little oil pipe compared to tool string
Or tool string connects more weight compared with the well workover pipe string that Big Inch forms, depth of setting is maximum, and setting ability is best, so tool
Series winding connects more weight and reconnects more weight compared with the well workover pipe string that Big Inch forms, before wherein weight is compared with Big Inch compared with little oil pipe
The combination of the well workover pipe string is optimal when end is lowered into hole angle A degree well depth；Wherein tool string connects more weight compared with Big Inch
It is small compared with the well workover pipe string depth of setting of Big Inch that the depth of setting of well workover pipe string than tool string connects more weight, so tool
Series winding connects more weight and connects more weight repairing compared with little oil pipe than tool string compared with the depth of setting of the well workover pipe string of Big Inch
Well casing column setting ability is poor.
Typical case:
Case subjects: certain X1 well, well depth 3102.9m, the horizontal well of horizontal segment 1000m.
Well workover operating condition is ground based on boring, it is identical in well workover parameter, under the identical horizontal well of horizontal well track, to well workover pipe
Column carries out the analog simulation that frictional resistance and hook carry and calculates, and analyzes the best setting ability of well workover pipe string；Wherein it is divided into for well workover pipe string
Three kinds of situations are studied below: well workover pipe string connects more weight by tool string and forms compared with little oil pipe；Well workover pipe string is by tool
Series winding connects more weight and connects more weight compared with reconnecting more after little oil pipe by tool string compared with Big Inch composition and well workover pipe string
Weight is formed compared with Big Inch.
Initially enter " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；Certain X1 is imported with Excel table
The horizontal well track data of well depth 3102.9m, horizontal segment 1000m generate corresponding " well depth ", " hole angle ", " orientation
Simultaneously draw out well track figure in angle " (referring to Figure of description 2).
" basic operation " button on main menu is clicked, " basic parameter setting " interface is popped up, it can be to " comprehensive parameters are set
Set ", " temperature parameter setting ", " pressure parameter setting " is configured, and successively carries out pit shaft internal diameter 124.3mm, pit shaft outer diameter
139.7mm, weight is compared with little oil pipe internal diameter 62mm, and weight is compared with little oil pipe outer diameter 73.02mm, the larger pipe aperture 76mm of weight, weight
Amount is compared with Big Inch outer diameter 88.9mm, oil pipe density 7850kg/m3,4200J/(kg DEG C of workover fluid specific heat), workover fluid discharge capacity
30m3/h, workover fluid density 1000kg/m3, screw rod power 40KW, screw rod nominal torque 1400N m, cumulative operation time 2h, oil
Manage rigid grade J55, casing rigid grade J55,20 DEG C of workover fluid temperature, 20 DEG C of wellhead temperature, 3 DEG C/100m of oil temperature gradient, well head pressure
Power 4MPa, well workover are pumped 8MPa, and screw rod power 40KW, screw rod nominal torque 1400Nm, cumulative operation time 2h parameter are loaded into
Into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirms errorless rear click " determination " button, return
Main interface, this completes the settings of the basic parameter of well workover pipe string, carry out the well workover pipe string tool string design of next stage.
" tool string design " button on main menu is clicked, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation
System " software " tool string design " interface carries out tool string combination according to different operating conditions in the toolbar of left side, suitable according to tripping in
Simultaneously its depth of setting is arranged in sequence select tools, the combination of workover tool string are as follows: and Ф 118mm flat-bottom grind shoes × 0.23m+ connector ×
0.16m+ horizontal well screw drill × 3.72m+ variable diameter × 0.19m+ pipe nipple × 1.5m+2-7/8 oil pipe × 62mm × 1 piece Ф+variable diameter
× 0.19m+2-7/8 oil pipe × Ф 62mm successively clicks " addition " button, shows its parameter in tool string table above；If
Relevant parameter need to be modified, then can click directly on " deletion " button, in right side " oil pipe combination " to 2-7/8 oil pipe depth of setting into
The depth of setting of row setting and 3-1/2 oil pipe is configured, and such well workover pipe string just connects more 2-7/8 oil pipe groups by tool string
It is formed at more 3-1/2 oil pipes are reconnected；After being provided with, confirms errorless rear click " determination " button, return to main interface, in this way
Just complete the Combination Design of well workover pipe string.
" passability analysis " button on main menu is clicked, " setting ability calculating " is clicked at pop-up " passability analysis " interface
Button, chart, which is fallen into a trap, on the left of " passability analysis " interface calculates radius of curvature parameter, and obtaining minimum profile curvature radius is 19.25m,
Right side chart data shows well workover pipe string combination, calculates single well workover pipe string maximum and passes through length and carry out judgement well workover pipe string
It can pass through；" generating report " button is clicked, blank space obtains analysis result above；Confirm that errorless rear click " determination " is pressed
Button returns to main interface, carries out the different operating condition tubing strings analysis of next stage.
Based on bore grind well workover operating condition under, according to the designed tool string in front " Horizontal Well Drilling grind tubing string LOAD FOR with
Dynamic simulation system " selection " boring the analysis of mill tubing string " button in software main interface, into " boring the analysis of mill tubing string " interface respectively into
Row well workover pipe string LOAD FOR.
Wherein when not changing the depth of setting of entire well workover pipe string, by changing the depth of setting of 3-1/2 oil pipe, reduce
The depth of setting of oil pipe changes the proportionate relationship between 2-7/8 oil pipe and 3-1/2 oil pipe, and 3-1/2 oil pipe is with depth of setting
100m is initial depth, and 250m is the depth of setting that depth of setting increment changes 3-1/2 oil pipe, reduces the tripping in of 2-7/8 oil pipe
Depth；The proportionate relationship changed between 2-7/8 oil pipe and 3-1/2 oil pipe each time all calculates once according to the mode of step (2)
Frictional resistance and hook of the well workover pipe string during tripping in carry size, show that connecting more 2-7/8 oil pipes by tool string reconnects more
Well workover pipe string is under under proportionate relationship of the well workover pipe string of oil pipe composition between different 2-7/8 oil pipes and 3-1/2 oil pipe
Frictional resistance and hook during entering carry size；When the ratio length of 3-1/2 oil pipe reaches inclination section using 50m as depth of setting increment
Change 3-1/2 oil pipe depth of setting, reduce 2-7/8 oil pipe depth of setting, by well workover pipe string different 2-7/8 oil pipes with
Frictional resistance and hook of the well workover pipe string during tripping in carry size calculating discovery and are not changing under proportionate relationship between oil pipe
When the depth of setting of entire well workover pipe string；When 3-1/2 oil pipe proportion length can be lowered into 45 degree of well depths of hole angle, repair
Hook when well casing column is lowered into shaft bottom carries maximum (referring to Figure of description 3,4), connects more 2-7/8 oil pipes compared to tool string
Or tool string connects the well workover pipe string of more 3-1/2 oil pipes composition, it is also maximum that hook when being lowered into shaft bottom, which carries,.
During well workover pipe string tripping in, well workover pipe string can be contacted with pit shaft generates frictional resistance, while in entire pit shaft,
Well workover pipe string is influenced by viscous resistance and along journey flow resistance；If the axial thrust load of tripping in well workover pipe string is greater than rubbing for its generation
Resistance, then well workover pipe string can generate a downward axial force, and hook suffered by well workover pipe string, which is carried, at this time thinks well workover pipe greater than 0
Column can be with tripping in, and well workover pipe string then can not tripping in after hook is carried less than 0；Therefore, deep in the tripping in for not changing entire well workover pipe string
When spending；Tool string connects the well workover pipe string tripping in that more 2-7/8 oil pipes reconnect more 3-1/2 oil pipes composition, wherein 3-1/2 oil
When pipe front end is lowered into 45 degree of well depths of hole angle, more 2-7/8 oil pipes are connected compared to tool string or tool string connects more 3-
The well workover pipe string of 1/2 oil pipe composition, depth of setting is maximum, and setting ability is best, so tool string connects more 2-7/8 oil pipes again
Connect the well workover pipe string of more 3-1/2 oil pipes composition, well workover when wherein 3-1/2 oil pipe front end is lowered into 45 degree of well depths of hole angle
The combination of tubing string is optimal；The setting ability that wherein tool string connects the well workover pipe string of more 3-1/2 oil pipes is connected than tool string
The well workover pipe string setting ability of more 2-7/8 oil pipes is poor.
In order to verify the correct of " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software LOAD FOR model
Property, the application collects three groups of in-situ horizontal well bore tracks and construction parameter.
1 in-situ horizontal well parameter of table
The construction parameter of three groups of in-situ horizontal wells is as follows:
Pit shaft internal diameter 124.3mm, pit shaft outer diameter 139.7mm, weight is compared with little oil pipe internal diameter 62mm, and weight is compared with little oil pipe outer diameter
73.02mm, the larger pipe aperture 76mm of weight, weight is compared with Big Inch outer diameter 88.9mm, oil pipe density 7850kg/m3, workover fluid
4200J/(kg DEG C of specific heat), workover fluid discharge capacity 30m3/h, workover fluid density 1000kg/m3, screw rod power 40KW, screw rod is specified
Torque 1400N m, cumulative operation time 2h, the rigid grade J55 of oil pipe, casing rigid grade J55,20 DEG C of workover fluid temperature, wellhead temperature 20
DEG C, oil temperature gradient 3 DEG C/100m, well head pressure 4MPa, well workover pump pressure 8MPa, screw rod power 40KW, screw rod nominal torque
1400Nm, cumulative operation time 2h
The well workover pipe string combination parameter of three groups of in-situ horizontal wells is as follows:
Workover tool string combination are as follows: Ф 118mm flat-bottom grind shoes × 0.23m+ connector × 0.16m+ horizontal well screw drill × 3.72m+
Variable diameter × 0.19m+ pipe nipple × 1.5m+2-7/8 oil pipe × 62mm × 1 piece Ф+variable diameter × 0.19m+2-7/8 oil pipe × Ф 62mm；
Well workover pipe string connects more 2-7/8 oil pipes by workover tool series winding and forms.
Three groups of in-situ horizontal well bore tracks of above-mentioned parameter and construction parameter are loaded into " Horizontal Well Drilling mill tubing string load
Calculating and dynamic simulation system " software, obtains the simulation depth of setting of three groups of in-situ horizontal well well workover pipe strings；Itself and construction site
Actual measurement depth of setting comparing result it is as follows:
2 measured result of table and software calculated result compare
It is compared from above-mentioned measured result and software calculated result, it can be deduced that " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic is imitative
It is 4.7% that true system " software, which calculates resulting simulation depth of setting and surveys the mean error of depth of setting, and error is smaller, thus
Demonstrate the depth of setting correctness that " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software calculates well workover pipe string.
Since " Horizontal Well Drilling mill tubing string LOAD FOR and dynamic simulation system " software is that this is based on when repairing horizontal well tubing string
Optimum organization method calculating basis；And to demonstrate " Horizontal Well Drilling grind tubing string LOAD FOR and dynamic simulation system " soft for test
The correctness of part, to demonstrate the feasibility of the optimum organization method from side.
The optimum organization method is provided fundamental basis for well workover pipe string combination, to obtain weight compared with little oil pipe and weight
Compared with the best proportion relationship between Big Inch, existing well workover pipe string is made to reach best setting ability, meets enterprise's production and application
Needs.
Claims (1)
1. a kind of optimum organization method based on when repairing horizontal well tubing string, it is characterised in that: described should be based on when repairing horizontal well
The optimum organization method of tubing string comprises the following steps:
(1), the foundation of when repairing horizontal well tubing string LOAD FOR model；
Choosing horizontal well is entirely partially research object from well head to shaft bottom, and the well workover pipe string in pit shaft is mainly connected by tool string
Well workover pipe string is now divided by more weight compared with more weight are reconnected after little oil pipe compared with Big Inch composition along wellbore axial direction
Four sections of vertical section, inclination section, horizontal segment and operation front end are studied, if being provided with n on the corresponding pit shaft of well workover pipe string
Well track measuring point；And a continuous micro_element section is regarded as in the part between the measuring point of adjacent wellbores track, then well workover pipe string can
To be separated into n-1 infinitesimal section；
Do following hypothesis first before modeling: 1) well workover pipe string is in linear elastic deformation state；2) well workover pipe string is in horizontal well
Horizontal segment be considered as and contacted with pit shaft continuity, and ignore the bending deformation that tool string generates at maximum gauge；3) well workover pipe
The axis of column and the axis of well track are consistent；4) well workover pipe string uses coefficient of friction fitting process meter in each well section coefficient of friction
It calculates；5) dynamic load is little in well workover pipe string, can omit；6) well workover pipe string stressing influence of the temperature change of well workover pipe string to this research
Less；The foundation of horizontal well well workover pipe string LOAD FOR model comprises the steps of: under assumed condition
A, workover fluid and well workover pipe string transactional analysis:
In actual production operation, due to having in pit shaft and workover fluid in well workover pipe string, when well workover pipe string above mention or under
Fashionable workover fluid can generate along journey flow resistance and viscous resistance well workover pipe string, therefore in view of above-mentioned each influence is to well workover pipe
The workover fluid frictional resistance of column is modified as follows:
Wherein:
The workover fluid frictional resistance of well workover pipe string, N；
Viscous resistance suffered by well workover pipe string, N；
Along journey flow resistance, N suffered by well workover pipe string；
Well workover pipe string outer diameter, mm；
Well workover pipe string internal diameter, mm；
Borehole diameter, mm；
Well depth, m；
Workover fluid yield value, Pa；
Well workover fluid viscosity, mPa ﹒ s；
Workover fluid apparent viscosity, mPa ﹒ s；
Workover fluid speed, m/s；
Workover fluid dynamic viscosity, mPa ﹒ s；
Acceleration of gravity, N/kg；
B, vertical section well workover pipe string force analysis:
Since well workover pipe string contacts with pit shaft in vertical well section smaller, assert that well workover pipe string rubs vertical well section is contactless
Resistance, and only acted on by buoyant weight, along journey flow resistance and viscous resistance, calculating vertical section well workover pipe string contact frictional resistance at this time is 0, axis
Power is well workover pipe string buoyant weight, i.e.,
Line weight of the well workover pipe string in workover fluid, N/m；
Well workover pipe string infinitesimal segment length, m；
Axle power suffered by well workover pipe string, N；
Well workover pipe string contacts suffered frictional resistance, N with pit shaft；
C, inclination section well workover pipe string force analysis:
Inclination section well workover pipe string infinitesimal section is taken, force analysis is carried out, well workover pipe string contacts after being lowered into inclination section with pit shaft
Shi Yinwei well workover pipe string gravity and generate frictional resistance, while being carried pulling force and wellbore support by hook in well workover pipe string tripping in workover treatment
Power considers further that under different well workover operating conditions, different workover fluid viscous resistances, along the influence of the parameters such as journey flow resistance, buoyant weight, at this time
Mechanical balance equation and moment of flexure equilibrium equation of the well workover pipe string in inclination section are as follows:
Solution formula, obtains:
In formula:
,
Support force of the pit shaft to well workover pipe string after considering buoyancy, N；When take "+",When take "-"；
Axial force suffered by well workover pipe string infinitesimal section lower surface, N；
、Hole angle on well workover pipe string infinitesimal section section, °；
The coefficient of friction of well workover pipe string and pit shaft；
、The shearing force of well workover pipe string two sections, N；
,Moment of flexure on well workover pipe string infinitesimal section section, N ﹒ m；
Inclination section radius of curvature, m；
、、、Transition parameter；
D, net horizontal section well workover pipe string force analysis
It is contacted according to well track, well workover pipe string with pit shaft and loading characteristic considers well workover pipe string buoyant weight and workover fluid along well workover
In tubing string, when outer flowing along journey flow resistance and viscous resistance, mechanical balance equation of the well workover pipe string in horizontal segment at this time are as follows:
In formula:
The synthesis frictional resistance of well workover pipe string and pit shaft, N；
E, the tool string Analysis on Mechanics Model of well workover pipe string operation front end；
The tool string of well workover pipe string operation front end is divided into two parts and is calculated, a part be screw rod tool nose tool, one
It is divided into screw rod tool rear portion tool；Screw rod tool nose tool consider tubing string rotation and pit shaft and milling object generate drag and torque and
The influence of pressure, screw rod tool rear portion tool consider that tubing string is contacted with pit shaft continuity and generate frictional resistance；Well workover pipe string operation at this time
The tool string mechanical balance equation of front end are as follows:
,Torque on well workover pipe string section, N ﹒ m；
Well workover pipe string infinitesimal section radius, °；
So far obtain when repairing horizontal well tubing string contacted according to well track, well workover pipe string with pit shaft and loading characteristic consider well workover pipe
Along tubing string, workover fluid when outer flowing is built along journey flow resistance and viscous resistance for column self weight, workover fluid buoyancy and workover fluid
Vertical when repairing horizontal well tubing string LOAD FOR model；
(2), analog simulation is carried out by " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；
The when repairing horizontal well tubing string LOAD FOR model obtained based on step (1)；" water is worked out using interpolation algorithm and iterative algorithm
Horizontal well bores mill tubing string LOAD FOR and dynamic simulation system " software；" Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
The copyright number of accepting of system " software is 2019R11S0139560；Utilize " Horizontal Well Drilling mill tubing string LOAD FOR and dynamic simulation
Steps are as follows for the analog simulation of system " software:
A, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；Horizontal well wellbore is imported with Excel table
Track data, generate corresponding " well depth ", " hole angle " " azimuth " and draws out well track figure, wellbore is calculated
The vertical depth and maximum horizontal displacement of track；
B, click main menu on " basic operation " button, pop up " basic parameter setting " interface, can to " comprehensive parameters setting ",
" temperature parameter setting ", " pressure parameter setting " are configured, and successively by pit shaft internal-and external diameter, weight is larger compared with little oil pipe and weight
The internal-and external diameter of oil pipe, oil pipe density, workover fluid specific heat, workover fluid discharge capacity, workover fluid density, screw rod power, screw rod nominal torque,
The rigid grade of cumulative operation time, oil pipe, the rigid grade of casing, workover fluid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover
Pump pressure parameter is loaded into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirms errorless rear click " really
It is fixed " button, main interface is returned to, this completes the settings of the basic parameter of well workover pipe string；
C, " tool string design " button on main menu is clicked, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
System " software " tool string design " interface, carries out tool string combination according to different operating conditions in the toolbar of left side, according to tripping in sequence
Simultaneously its depth of setting is arranged in select tools, successively clicks " addition " button, shows its parameter in tool string table above；If needing
Relevant parameter is modified, then can click directly on " deletion " button, it can be to weight compared with little oil pipe and weight in right side " oil pipe combination "
Depth of setting compared with Big Inch is configured；After being provided with, " preservation " button is clicked, the parameter set is can be reserved for and generates newly
Text；The Import button can be clicked directly on when subsequent operation, the parameter set before importing；Confirm errorless rear click " really
It is fixed " button, main interface is returned to, this completes the Combination Designs of well workover pipe string；
D, " passability analysis " button on main menu is clicked, pop-up " passability analysis " interface is clicked " setting ability calculating " and pressed
Button, chart, which is fallen into a trap, on the left of " passability analysis " interface calculates radius of curvature parameter, obtains minimum profile curvature radius, right side chart numbers
According to display well workover pipe string combination, calculates single well workover pipe string maximum and pass through length and carry out judging that can well workover pipe string pass through；
" generating report " button is clicked, blank space obtains analysis result above；Confirm errorless rear click " determination " button, returns to main boundary
Face carries out the different operating condition tubing strings analysis of next stage；
E, based on boring under mill well workover operating condition, according to the designed tool string in front " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic
Selection " boring the analysis of mill tubing string " button, carries out respectively into " boring the analysis of mill tubing string " interface in state analogue system " software main interface
Well workover pipe string LOAD FOR obtains frictional resistance and hook load during the tripping in of entire well workover pipe string；And on " boring the analysis of mill tubing string " boundary
It is obtained in left side of face table and corresponds to frictional resistance and hook load numerical value, and obtains frictional resistance and hook load figure line on right side；Click " image guarantor
Deposit " button, can be reserved for the curve generated is jpg format；Simulation analysis needed for completing and image close analysis window after saving, and return
Return main interface；
(3), identical in well workover parameter based on boring mill well workover operating condition, under the different multiple horizontal wells of horizontal well track, to repairing
Well casing column carries out the analog simulation that frictional resistance and hook carry and calculates；
Take pit shaft internal-and external diameter first, weight compared with little oil pipe and weight compared with the internal-and external diameter of Big Inch, oil pipe density, workover fluid specific heat,
Workover fluid discharge capacity, screw rod power, screw rod nominal torque, cumulative operation time, the rigid grade of oil pipe, the rigid grade of casing, is repaired at workover fluid density
Well liquid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover pump pressure parameter (being referred to as well workover parameter) are identical, horizontal
The different multiple horizontal wells of well bore track are studied, and by above-mentioned horizontal well track and well workover parameter, according to step
(2) mode is loaded into respectively in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；
For multiple horizontal wells of different well tracks, for every kind of horizontal well track situation again by well workover pipe string be divided into
Lower three kinds of situations are studied: well workover pipe string connects more weight by tool string and forms compared with little oil pipe；Well workover pipe string is by tool string
It connects more weight and more weight is connected compared with reconnecting more weights after little oil pipe by tool string compared with Big Inch composition and well workover pipe string
Amount is formed compared with Big Inch；
" Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software " tool is then entered according to the mode of step (2)
String design " interface, according to the horizontal well track of different level segment length according to tripping in sequential selection in the toolbar of left side
Simultaneously its depth of setting is arranged in tool, well workover pipe string tool string are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil
Pipe+variable diameter is configured weight compared with little oil pipe depth of setting in right side " oil pipe combination ", not under the larger oil pipe of weight
Enter depth to be configured, such well workover pipe string just connects more weight by tool string and forms compared with little oil pipe；
" leading in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software is carried out further according to the mode of step (2)
The property crossed analysis ", confirmation well workover pipe string can safe tripping in by after inclination section according to the designed tool string in front in " Horizontal Well Drilling
Selection " boring the analysis of mill tubing string " button in mill tubing string LOAD FOR and dynamic simulation system " software main interface, into " brill mill tubing string
Analysis " interface carries out well workover pipe string LOAD FOR, obtains and connects more weight compared with the well workover pipe string that little oil pipe forms by tool string
Frictional resistance and hook during tripping in carry size；
It repeats above-mentioned software analog simulation step and is loaded into different multiple horizontal well tracks and identical well workover parameter, in " water
According to different water in toolbar on the left of horizontal well brill mill tubing string LOAD FOR and dynamic simulation system " software " tool string design " interface
The horizontal well track of flat segment length is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string
Are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with
Big Inch depth of setting is configured, and the depth of setting to weight compared with little oil pipe is not configured, and such well workover pipe string is just by work
Tool series winding connects more weight and forms compared with Big Inch；
Then " the passability analysis " in progress " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirmation
The safe tripping in of well workover pipe string energy is by inclination section, later according to the designed tool string in front in " Horizontal Well Drilling mill tubing string load
Selection " boring the analysis of mill tubing string " button in calculating and dynamic simulation system " software main interface, into " analysis of brill mill tubing string " interface
Well workover pipe string LOAD FOR is carried out, obtains and well workover pipe string that more weight are formed compared with Big Inch is connected in tripping in process by tool string
In frictional resistance and hook carry size；
It repeats above-mentioned software analog simulation step and is loaded into different multiple horizontal well tracks and identical well workover parameter, in " water
According to different water in toolbar on the left of horizontal well brill mill tubing string LOAD FOR and dynamic simulation system " software " tool string design " interface
The horizontal well track of flat segment length is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string
Are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with
Little oil pipe and weight are configured compared with the depth of setting of Big Inch, and it is smaller that such well workover pipe string just connects more weight by tool string
Oil pipe reconnects more weight and forms compared with Big Inch, and then in progress, " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system
" passability analysis " in system " software, the safe tripping in of confirmation well workover pipe string energy are designed according to front later by inclination section
Tool string selection " boring the analysis of mill tubing string " in " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software main interface
Button carries out well workover pipe string LOAD FOR into " boring the analysis of mill tubing string " interface；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 500m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；By taking well workover parameter
Identical, the different multiple horizontal wells of horizontal well track are studied, and well workover pipe string is in different weight compared with little oil pipe and weight
Size, which is carried, compared with frictional resistance of the well workover pipe string under the proportionate relationship between Big Inch during tripping in and hook calculates discovery with weight
Ratio length compared with entire well workover pipe string shared by Big Inch increases, and entire well workover pipe string is lowered into frictional resistance and hook when bottom hole location
Load increases accordingly；When weight reaches inclination section value compared with the ratio length of entire well workover pipe string shared by Big Inch, the increasing of frictional resistance
Long rate starts to increase, and hook, which carries, to be reduced, but the increase tendency of frictional resistance is steeper, and the reduction trend that hook carries is relatively slow；Therefore well workover pipe string
Variation critical condition of the weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch in inclination section；
In conjunction with above-mentioned research, made compared with little oil pipe and weight compared with the proportionate relationship between Big Inch for the weight of well workover pipe string
Oblique section specific location carries out sunykatuib analysis, is loaded into a bite horizontal well track and well workover parameter according to the mode of step (2)
Into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, then in " Horizontal Well Drilling mill tubing string LOAD FOR
With dynamic simulation system " horizontal well wellbore on the left of software " tool string design " interface in toolbar according to different level segment length
Track is according to tripping in sequential selection tool and its depth of setting is arranged, well workover pipe string tool string are as follows: flat-bottom grind shoes+connector+level
Well screw drill+variable diameter+pipe nipple+oil pipe+variable diameter, in right side " oil pipe combination " to weight compared with little oil pipe and weight compared with Big Inch
Depth of setting is configured, and such well workover pipe string just connects more weight by tool string, and compared with little oil pipe to reconnect more weight larger
Oil pipe forms, then " the passability point in progress " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software
Analysis ", the safe tripping in of confirmation well workover pipe string energy is by inclination section, later according to the designed tool string in front in " Horizontal Well Drilling mill
Selection " boring the analysis of mill tubing string " button in tubing string LOAD FOR and dynamic simulation system " software main interface, into " brill mill tubing string point
Analysis " interface carries out well workover pipe string LOAD FOR；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 250m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；In weight compared with Big Inch
Change depth of setting of the weight compared with Big Inch by depth of setting increment of 50m when ratio length reaches inclination section, reduce weight compared with
The depth of setting of little oil pipe, by well workover pipe string in different weight compared with little oil pipe and weight compared under the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in carry size and calculate discovery；It is wherein deep in the tripping in for not changing entire well workover pipe string
When spending, when weight can be lowered into hole angle A degree well depth compared with Big Inch proportion length, when well workover pipe string is lowered into shaft bottom
Hook carry maximum, while connecting more weight compared to tool string and connecting more weight compared with Big Inch group compared with little oil pipe or tool string
At well workover pipe string, it is also maximum that hook when being lowered into shaft bottom, which carries,；
(4) based on mill well workover operating condition is bored, the best setting ability of well workover pipe string is analyzed；
Suffered hook, which is carried, during well workover pipe string tripping in thinks that well workover pipe string can be with tripping in greater than 0, well workover pipe string after hook is carried less than 0
It then can not tripping in；Therefore, it is the basis for studying well workover pipe string depth of setting that hook, which carries,；By taking certain horizontal well track as an example, it is assumed that
Horizontal segment indefinite extension in one direction carries out simulation by software in the combination of identical tool string and well workover parameter and divides
Analysis can know the maximum depth of setting of well workover pipe string by judge whether hook load is 0；
In order to study when not changing the depth of setting of entire well workover pipe string；More weight are connected by tool string to connect again compared with little oil pipe
Hole angle A degree can be lowered into compared with Big Inch proportion length in weight compared with the well workover pipe string that Big Inch forms by connecing more weight
Under proportionate relationship when well depth comparison by tool string connect more weight compared with the well workover pipe string of little oil pipe or connection more weight compared with
It is more compared with little oil pipe reconnection to judge whether that tool string connects more weight for the maximum depth of setting of the well workover pipe string of Big Inch composition
Root weight can be lowered into hole angle A degree well depth compared with Big Inch proportion length in weight compared with the well workover pipe string that Big Inch forms
When setting ability it is best；
Based on step (3) it is obtained more weight connected by tool string reconnect more weight compared with little oil pipe formed compared with Big Inch
Well workover pipe string connect well workover pipe string that more weight are formed compared with little oil pipe with tool string or tool string to connect more weight larger
Frictional resistance and hook of the well workover pipe string of oil pipe composition during tripping in carry size, it can be determined that go out the depth of well workover pipe string；
It is repaired to further verify to connect more weight by tool string and reconnect more weight compared with little oil pipe compared with what Big Inch formed
Well casing column connect more weight compared with little oil pipe with by tool string when weight is compared with the well depth that Big Inch ratio length is hole angle A degree
It is best compared to its setting ability compared with the well workover pipe string that Big Inch forms that the well workover pipe string or tool string of composition connect more weight；
By taking certain horizontal well track as an example, it is assumed that horizontal segment indefinite extension in one direction, in the combination of identical tool string and well workover
In the case of parameter in the way of step (2) by software carry out sunykatuib analysis discovery using by tool string connect more weight compared with
Little oil pipe reconnects more weight compared with the well workover pipe string tripping in that Big Inch forms, and wherein weight is lowered into hole deviation compared with Big Inch front end
When the A degree well depth of angle, more weight are connected compared to tool string and connect more weight compared with Big Inch composition compared with little oil pipe or tool string
Well workover pipe string, depth of setting is maximum, and setting ability is best；Wherein tool string connects well workover pipe string of the more weight compared with Big Inch
Setting ability than tool string to connect more weight poor compared with the well workover pipe string setting ability of little oil pipe；
(5) application method is as follows；
Into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software；A bite Horizontal Well is imported with Excel table
The track data of eye generates corresponding " well depth ", and " hole angle " " azimuth " and draws out well track figure, well is calculated
The vertical depth and maximum horizontal displacement of eye track；
Click main menu on " basic operation " button, pop up " basic parameter setting " interface, can to " comprehensive parameters setting ",
" temperature parameter setting ", " pressure parameter setting " are configured, and successively by pit shaft internal-and external diameter, weight is larger compared with little oil pipe and weight
The internal-and external diameter of oil pipe, oil pipe density, workover fluid specific heat, workover fluid discharge capacity, workover fluid density, screw rod power, screw rod nominal torque,
The rigid grade of cumulative operation time, oil pipe, the rigid grade of casing, workover fluid temperature, wellhead temperature, oil temperature gradient, well head pressure, well workover
Pump pressure parameter is loaded into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system " software, confirms errorless rear click " really
It is fixed " button, main interface is returned to, this completes the settings of the basic parameter of well workover pipe string；
" tool string design " button on main menu is clicked, into " Horizontal Well Drilling grinds tubing string LOAD FOR and dynamic simulation system "
Software " tool string design " interface carries out tool string combination according to different operating conditions in the toolbar of left side, selects according to tripping in sequence
It selects tool and its depth of setting is set, well workover pipe string tool string are as follows: flat-bottom grind shoes+connector+horizontal well screw drill+variable diameter+pipe nipple+
Oil pipe+variable diameter successively clicks " addition " button, shows its parameter in tool string table above；If relevant parameter need to be modified,
" deletion " button can be clicked directly on, it can tripping in weight compared with little oil pipe and weight compared with Big Inch in right side " oil pipe combination "
Depth is configured；Well workover pipe string just connects more weight by tool string and reconnects compared with little oil pipe mostly with weight compared with Big Inch in this way
Composition after being provided with, confirms errorless rear click " determination " button, returns to main interface, this completes the groups of well workover pipe string
Close design；
" passability analysis " button on main menu is clicked, pop-up " passability analysis " interface is clicked " setting ability calculating " and pressed
Button, chart, which is fallen into a trap, on the left of " passability analysis " interface calculates radius of curvature parameter, obtains minimum profile curvature radius, right side chart numbers
According to display well workover pipe string combination, calculates single well workover pipe string maximum and pass through length and carry out judging that can well workover pipe string pass through；
" generating report " button is clicked, blank space obtains analysis result above；Confirm errorless rear click " determination " button, returns to main boundary
Face carries out the different operating condition tubing strings analysis of next stage；
It is ground under well workover operating condition based on boring, according to the designed tool string in front in " Horizontal Well Drilling mill tubing string LOAD FOR and dynamic
Selection " boring the analysis of mill tubing string " button, is repaired respectively into " boring the analysis of mill tubing string " interface in analogue system " software main interface
Well casing column load calculates, and obtains frictional resistance and hook load size during the tripping in of entire well workover pipe string；
Wherein when not changing the depth of setting of entire well workover pipe string, by changing depth of setting of the weight compared with Big Inch, reduce
Weight changes weight compared with little oil pipe and weight compared with the proportionate relationship between Big Inch, the larger oil of weight compared with the depth of setting of little oil pipe
For pipe using depth of setting 100m as initial depth, 250m is that depth of setting increment changes depth of setting of the weight compared with Big Inch, is reduced
Depth of setting of the weight compared with little oil pipe；Change weight each time compared with little oil pipe and weight compared with all roots of the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in are calculated according to the mode of step (2) and carries size, are obtained and are connected by tool string
More weight reconnect well workover pipe string that more weight are formed compared with Big Inch in different weight compared with little oil pipe and weight compared with little oil pipe
Compared with frictional resistance and hook load size of the well workover pipe string under the proportionate relationship between Big Inch during tripping in；In weight compared with Big Inch
Change depth of setting of the weight compared with Big Inch by depth of setting increment of 50m when ratio length reaches inclination section, reduce weight compared with
The depth of setting of little oil pipe, by well workover pipe string in different weight compared with little oil pipe and weight compared under the proportionate relationship between Big Inch
Frictional resistance and hook of the well workover pipe string during tripping in carry size and calculate discovery when weight can be following compared with Big Inch proportion length
When entering to hole angle A degree well depth, hook when well workover pipe string is lowered into shaft bottom carry it is maximum, compared to tool string connect more weight compared with
Little oil pipe or tool string connect more weight compared with the well workover pipe string that Big Inch forms, and it is also maximum that hook when being lowered into shaft bottom, which carries,；
It is carried according to hook suffered during well workover pipe string tripping in and thinks that well workover pipe string can be with tripping in greater than 0, well workover pipe string after hook is carried less than 0
It then can not tripping in；Therefore, tool string connects more weight and reconnects more weight compared with the well workover pipe that Big Inch forms compared with little oil pipe
When wherein weight is lowered into hole angle A degree well depth compared with Big Inch front end, it is smaller to connect more weight compared to tool string for column tripping in
Oil pipe or tool string connect more weight compared with the well workover pipe string that Big Inch forms, and depth of setting is maximum, and setting ability is best, so
Tool string connects more weight and reconnects more weight compared with the well workover pipe string that Big Inch forms compared with little oil pipe, wherein the larger oil of weight
The combination of the well workover pipe string is optimal when pipe front end is lowered into hole angle A degree well depth；It is specific compared with Big Inch that weight so can be obtained
Length and weight compared with little oil pipe length, to obtain the proportionate relationship between them.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112818609A (en) * | 2021-01-05 | 2021-05-18 | 中国石油天然气股份有限公司 | Method for evaluating running-in capacity of combined pipe column for sand washing operation of long horizontal section horizontal well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112818609A (en) * | 2021-01-05 | 2021-05-18 | 中国石油天然气股份有限公司 | Method for evaluating running-in capacity of combined pipe column for sand washing operation of long horizontal section horizontal well |
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