CN108119106A - Screen sand control tubing string and its releasing method - Google Patents
Screen sand control tubing string and its releasing method Download PDFInfo
- Publication number
- CN108119106A CN108119106A CN201711178575.2A CN201711178575A CN108119106A CN 108119106 A CN108119106 A CN 108119106A CN 201711178575 A CN201711178575 A CN 201711178575A CN 108119106 A CN108119106 A CN 108119106A
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- China
- Prior art keywords
- sand control
- pipe
- screen
- sand
- flushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/03—Freeing by flushing
Abstract
The invention discloses a kind of screen sand control tubing string and its releasing method, which includes：Sand control stays well casing column and washover pipe, wherein, sand control stays well casing column to include successively from top to bottom：Sand control packer adjusts long light pipe, sand control screen, sand setting light pipe, flushing tool, and flushing tool is provided with switching mechanism；Washover pipe includes：Washing pipe, the vibration flusher being arranged on washing pipe and the mating flushing insertion tool of flushing tool, when the sand control stays well casing column that sand card occurs, washover pipe described in tripping in well casing column is stayed to the sand control, the switching mechanism for rinsing insertion tool and opening the flushing tool, the sand control stays the annular space outside well casing column to be connected with the inside of the washover pipe, is formed and rinses unfreezing circulation path.Screen sand control tubing string provided by the invention and its releasing method realize the efficient unfreezing of screen sand control tubing string and fast salvaging using the mode that liquid stream is rinsed.
Description
Technical field
The present invention relates to oil-gas mining technical field, more particularly to a kind of screen sand control tubing string and its releasing method.
Background technology
Screen sand control tubing string is generally made of from top to bottom packer, blind pipe, screen casing and extremely stifled (silk plug), in addition, tubing string
In safety joint can also be installed sometimes.In use, screen sand control tubing string tripping in is shaked out in oil gas well shaft, screen casing is utilized
Stratum entrained in the production fluid of stratum is blocked in outside screen casing, so as to achieve the purpose that sand control by filtering function.On the whole,
Screen sand control is a kind of mechanical sand control technology, is become due to it has the characteristics that easy construction, measure are at low cost in oil exploitation
One of most widely used sand control technique.
But field application finds that this screen sand control tubing string later stage salvaging is very difficult, the reason is that：Through after a while
Layer of sand is formed with mineshaft annulus outside tubing string afterwards, sand control pipe is stuck by layer of sand.It is thus typically necessary to coordinated using heavy repair task
Salvage, there are fishing rise lower tubular column often, salvage the cycle it is long, fishing is costly the problems such as.
Therefore, it is necessary to provide a kind of screen sand control tubing string of flushable unfreezing, the efficient unfreezing of screen sand control tubing string is realized,
Fast salvaging.
The content of the invention
The object of the present invention is to provide the screen sand control tubing strings and its releasing method of a kind of flushable unfreezing, can overcome existing
There is the defects of technology, the efficient unfreezing of screen sand control tubing string and fast salvaging are realized using the mode that liquid stream is rinsed.
Following technical proposal can be used to realize in the above-mentioned purpose of the present invention：
A kind of screen sand control tubing string, including：Sand control stays well casing column and washover pipe, wherein,
The sand control stays well casing column to include successively from top to bottom：Sand control packer adjusts long light pipe, sand control screen, sand setting light
Pipe, flushing tool, the flushing tool are provided with switching mechanism；
The washover pipe includes：It is washing pipe, the vibration flusher being arranged on the washing pipe, mating with the flushing tool
Flushing insertion tool, the flushing insertion tool can open the switching mechanism when being inserted into the flushing tool；
When the sand control stays well casing column that sand card occurs, washover pipe described in tripping in, institute in well casing column are stayed to the sand control
It states and rinses the switching mechanism that insertion tool opens the flushing tool, the sand control stays annular space and the flush pipe outside well casing column
The inside connection of column, forms and rinses unfreezing circulation path.
In one preferred embodiment, the vibration flusher is located at the sand control packer and the flushing grafting
Between instrument.
In one preferred embodiment, the number of the vibration flusher is multiple, multiple vibration flushers
It is spaced a predetermined distance and is uniformly arranged on the washing pipe.
In one preferred embodiment, the vibration flusher is provided with runner, and the runner is located at the washing pipe
Outside, when fluid flows through the runner, the vibration flusher can generate the liquid pressure Reeb of preset frequency.
In one preferred embodiment, the sand control screen face oil reservoir pay interval.
In one preferred embodiment, when the interlayer that there is thickness to be more than predetermined thickness in the oil reservoir pay interval
When, the light pipe faced with the interlayer is additionally provided in the sand control screen.
In one preferred embodiment, between the length of the sand setting light pipe is 10 meters to 30 meters.
In one preferred embodiment, the washing pipe is connected to the flushing work in shaft bottom from ground well head always
Tool, the flushing unfreezing circulation path are：The washover pipe and sand control stay interior annular space between well casing column to the sand screen
The hole of pipe flow to the outer annular space of the sand control screen and pit shaft to the flushing tool to the washover pipe in, it is last to ground
Face.
Based on the releasing method of above-mentioned screen sand control tubing string, including：When sand control stays well casing column that sand card occurs, to described
Sand control stays tripping in washover pipe in well casing column, realizes that the washover pipe stays well casing column to dock with the sand control；
After the washover pipe stays well casing column to dock in place with sand control, the switch that insertion tool opens flushing tool is rinsed
Mechanism makes the sand control that the annular space outside well casing column be stayed to be connected with the inside of the washover pipe, is formed and rinses unfreezing circulation path；
The annular space between well casing column is stayed to inject flushing liquor to the washover pipe and sand control so that vibration flusher generates liquid
Body pressure wave stays the sand control layer of sand of annular space outside well casing column to carry out vibratory impulse；Sand grains passes through the flushing unfreezing in well
Circulation path returns to ground.
In one preferred embodiment, after the completion of unfreezing is rinsed, further include：
Act the washover pipe, the switching mechanism of flushing tool is again switched off, and tripping in fishing tool is to sand control packer
Deblocking, and tubing string is disposably pulled out.
The features and advantages of the invention are：Screen sand control tubing string provided herein and its releasing method pass through setting
Mating sand control stays well casing column and washover pipe, can realize following technique effect：
1) sand control of the invention stays well casing post part to form simple, and construction is simple；
2) the washover pipe part of the invention is formed simple, is easy to light maintenance Job Operations；
3) it can be achieved using the invention to the function that annular space layer of sand is rinsed outside screen casing, relieve screen sand control tubing string quilt
Stuck risk realizes the salvaging of screen sand control tubing string underload, fast salvaging and controllable salvaging；
4) the flushing unfreezing sand control pipe, fishing only need light maintenance job mix to construct, greatly reduce screen casing
The salvage expenses of sand control pipe.
With reference to following explanation and attached drawing, the particular implementation of the application is disclosed in detail, specifies the original of the application
Reason can be in a manner of adopted.It should be understood that presently filed embodiment is not so limited in scope.In appended power
In the range of the spirit and terms of profit requirement, presently filed embodiment includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
Used in a other embodiment, with the feature in other embodiment it is combined or substitute other embodiment in feature.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Description of the drawings
Fig. 1 is the structure diagram that a kind of sand control of screen sand control tubing string stays well casing column in the application embodiment；
Fig. 2 is that sand control stays well casing column by the stuck schematic diagram of layer of sand after being produced in the application embodiment；
Fig. 3 is a kind of washover pipe structure diagram of screen sand control tubing string in the application embodiment；
Fig. 4 is a kind of impact unfreezing principle schematic of washover pipe in the application embodiment；
Fig. 5 is the design sketch reached after rinsing；
Fig. 6 is a kind of releasing method flow chart of steps of screen sand control tubing string in the application embodiment.
Reference sign：
A- surface pipes；B- protective casings；C- layers of sand；1- sand control packers；The long light pipe of 2- tune；3- sand control screens；4- sinks
Sanding pipe；5- flushing tools；6- washing pipes；7- vibrates flusher；70- runners；8- rinses insertion tool；The outer annular spaces of 9-.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, elaborate to technical scheme, it should be understood that these
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention, after the present invention has been read, this field skill
Art personnel each fall in the application scope as defined in the appended claims the modification of the various equivalent forms of the present invention.
Unless otherwise defined, all of technologies and scientific terms used here by the article and the technical field of the application is belonged to
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.
It should be noted that when element is referred to as " being arranged at " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " on ",
" under ", "left", "right" and similar statement for illustrative purposes only, it is unique embodiment to be not offered as.
The present invention provides a kind of the screen sand control tubing string and its releasing method of flushable unfreezing, can overcome in the prior art
The defects of, it realizes the efficient unfreezing of screen sand control tubing string using the mode that liquid stream is rinsed, and is conducive to follow-up fast salvaging and controllable
It salvages.
It please refers to Fig.1 to Fig. 5, provides a kind of screen sand control tubing string in the application embodiment, can include：Sand control stays
Well casing column and washover pipe, wherein, the sand control stays well casing column to include successively from top to bottom：Sand control packer 1, adjust long light pipe 2,
Sand control screen 3, sand setting light pipe 4, flushing tool 5, the flushing tool 5 are provided with switching mechanism；The washover pipe includes：Punching
Pipe 6, the vibration flusher 7 being arranged on the washing pipe 6 and the mating flushing insertion tool 8 of the flushing tool 5, the punching
The switching mechanism can be opened by washing when insertion tool 8 is inserted into the flushing tool 5；When the sand control stays well casing column that sand card occurs
When, washover pipe described in tripping in well casing column is stayed to the sand control, the flushing insertion tool 8 opens the flushing tool 5
Switching mechanism, the sand control stay the annular space outside well casing column to be connected with the inside of the washover pipe, are formed to rinse unfreezing and cycle and be led to
Road.
A kind of screen sand control tubing string of the flushable unfreezing provided in the application embodiment mainly includes：Sand control stays well casing
Column and washover pipe.Wherein, sand control stays well casing column to include sand control packer 1 successively from top to bottom, adjust long light pipe 2, sand control screen
3rd, sand setting light pipe 4, flushing tool 5.Washover pipe includes washing pipe 6, vibration flusher 7, rinses insertion tool 8.
Wherein, sand control packer 1 is located at the top of sand control pipe, stays well casing column and insulates sand control for fixing sand control and stays well
Annular space between tubing string and pit shaft.Specifically, the upper wellbore can be provided with the surface pipe a of predetermined length, the table
Protective casing b is provided in layer casing a.The protective casing b adjusts long light pipe 2 to form the first annular space with described.The anti-sand seal
It can be arranged in the protective casing b and first annular space adjusted between long light pipe 2 every device 1.
It is described to adjust long light pipe 2 between sand control packer 1 and sand control screen 3, by the way that the long light pipe 2 of appropriate tune is selected to grow
Degree can adjust sand control packer 1 and be located at suitable position in pit shaft.
The sand control screen 3, which is located at, to be adjusted between long light pipe 2 and sand sediment pipe.Sand control screen 3 has filtering function, can be by ground
Entrained sand is blocked in outside screen casing in layer production fluid, so as to achieve the purpose that sand control.Specifically, the sand control screen 3 can
With face oil reservoir pay interval, in order to which oil reservoir pay interval production fluid is quickly and accurately imported in pit shaft.
In addition, when having the interlayer of more than predetermined thickness in pay interval, it is additionally provided in the sand control screen 3 and institute
State the light pipe that interlayer faces.Specifically, for there is the well of thicker interlayer in pay interval, can also be added in sand control screen 3
Light pipe, to isolate not fuel-displaced interlayer.Wherein, the predetermined thickness can be according to adaptability such as actual interlayer geological conditions
Selection, specifically, the application does not make specific limit herein.
The sand setting light pipe 4 plays between sand control screen 3 and flushing tool 5 and collects what sand control screen 3 can not filter out
The effect of micro-solid particle, the sand setting light pipe 4 can extend the Sand-washing cycle of oil well.Theoretically, the length of the sand setting light pipe 4
The longer the better for degree, but considers follow-up facilitate and act pit shaft by the screen sand control tubing string, and the length of the sand setting light pipe 4 can be
Between 10 meters to 30 meters.
The flushing tool 5 is located at the bottom that sand control stays well casing column, which is internally provided with switching mechanism, raw
Chan Shi mechanisms are closed, and switching mechanism is opened when rinsing the insertion of insertion tool 8 docking in place, and sand control stays well casing outer shroud
Sky 9 inside flush pipe with being connected.
Plain tubing can be used in the washing pipe 6 or other job execution tubing strings, washing pipe 6 are connected to well always from ground well head
Bottom flushing tool 5 is the main composition of washover pipe.
The bottommost for rinsing insertion tool 8 and being located at washover pipe, rinses insertion tool 8 and matches with flushing tool 5,
After being inserted in place, the switching mechanism inside flushing tool 5 can be opened, sand control is made to stay inside the outer annular space 9 of well casing column and flush pipe
It is connected.Specifically, can be provided with holding section in the switching mechanism of the flushing tool 5, the flushing insertion tool 8 can be with
It is provided with and the matched plug division in the holding section, when plug division is inserted into the holding section, the switching mechanism opening.Into
One step, when the holding section is extracted in the plug division, the switching mechanism can close.
The vibration flusher 7 is mounted on washover pipe, between sand control packer 1 and flushing insertion tool 8, one
The vibration flusher 7 of fixed number amount uniformly installation at regular intervals, to play uniform preferable vibrating effect.Specifically, vibration
Flusher 7 can be provided with runner 70, and the runner 70 can be located at outside the washing pipe 6.When well-flushing fluid flows through vibration washing
During the runner 70 of device, the liquid pressure Reeb of certain frequency can be generated, vibratory impulse is carried out to the layer of sand c for staying annular space 9 outside well casing column,
Layer of sand c is loosened, improves flush efficiency of the flushing fluid to layer of sand c.The middle part of the vibration flusher 7 is set in the washing pipe
On 6.
Fig. 4 and Fig. 5 are referred to, the washing pipe 6 is connected to the flushing tool 5 in shaft bottom from ground well head always, described
Rinsing unfreezing circulation path is：The washover pipe and sand control stay interior annular space between well casing column to the hole of the sand control screen 3
Clearance flow to the sand control screen 3 and pit shaft outer annular space 9 to the flushing tool 5 to the washover pipe in, finally to ground.
During specific unfreezing, to the washover pipe and sand control stay well casing column between interior annular space inject flushing liquor so that shake
Dynamic flusher 7 generates liquid pressure Reeb, and vibration punching is carried out to the layer of sand c of the outer annular space 9 between the sand control screen 3 and casing
It hits；Flushing liquor is flow to the outer annular space 9 of the sand control screen 3 and pit shaft by the hole on the sand control screen 3 and is rushed simultaneously
Sand；Flushing liquor is entered by the flushing tool 5 in the washover pipe with sand, finally returns to ground.
To sum up, a kind of screen sand control tubing string provided by the invention, by set the sand control that matches stay well casing column and
Washover pipe can periodically clean the layer of sand c of sand control pipe and mineshaft annulus using washover pipe, rinse after layer of sand c in fact
Existing sand control pipe unfreezing, achievees the purpose that the quick unfreezing fishing of screen sand control tubing string.
Referring to Fig. 6, based on the screen sand control tubing string provided in the above embodiment, present invention also provides a kind of correspondences
Releasing method, specifically, it can include：
Step S10：When sand control stays well casing column that sand card occurs, tripping in washover pipe in well casing column is stayed to the sand control, it is real
The existing washover pipe stays well casing column to dock with the sand control；
Step S12：After the washover pipe stays well casing column to dock in place with sand control, rinse insertion tool 8 and open flushing
The switching mechanism of instrument 5 makes the sand control that the annular space outside well casing column be stayed to be connected with the inside of the washover pipe, is formed and rinses solution
Card circulation path；
Step S14：The annular space between well casing column is stayed to inject flushing liquor to the washover pipe and sand control so that vibration is rinsed
Device 7 generates liquid pressure Reeb, and the layer of sand c of annular space 9 outside well casing column is stayed to carry out vibratory impulse to the sand control；Sand grains passes through institute in well
It states flushing unfreezing circulation path and returns to ground.
After the completion of unfreezing is rinsed, this method can also include：Act the washover pipe, the switching on and shutting down of flushing tool 5
Structure is again switched off, and tripping in fishing tool unseals sand control packer 1, and tubing string is disposably pulled out.
Under a specific implement scene, please refer to shown in Fig. 1 to Fig. 5, using screen casing provided herein
When sand control pipe carries out field conduct：
For sand output well, can first tripping in sand control well casing column is stayed to carry out sand control.
As shown in Figure 1, sand control stays well casing column to include sand control packer 1 successively from top to bottom, adjust long light pipe 2, sand control screen
3rd, sand setting light pipe 4, flushing tool 5.Sand control packer 1 is located at the top that sand control stays well casing column, plays fixed sand control and stays well casing column
And insulate the effect that sand control stays well casing column and mineshaft annulus.Long light pipe 2 is adjusted between sand control packer 1 and sand control screen 3, is led to
It crosses and selects appropriate adjusting optical tube length that can adjust sand control packer 1 to be located at suitable position in pit shaft.Sand control screen 3, which is located at, to be adjusted
Between long light pipe 2 and sand sediment pipe, 3 face oil reservoir pay interval of sand control screen, sand control screen 3 plays filtering function and (produces stratum
Go out stratum entrained in liquid to be blocked in outside screen casing, so as to achieve the purpose that sand control).Sand setting light pipe 4 is located at 3 He of sand control screen
Between flushing tool 5, play the role of collecting the micro-solid particle that sand control screen 3 can not filter out, rushing for oil well can be extended
The sand cycle.Flushing tool 5 is located at the bottom that sand control stays well casing column, tool interior design switching mechanism, and mechanism, which is in, during production closes
Closed state.
Oil well production for a period of time after, by the reservoir sand of screen casing filtering, annular space between pit shaft forms layer of sand outside screen casing
C, as shown in Figure 2.
It, can be with tripping in washover pipe just when thering is screen casing blocking, screen sand control failure, oil well to need to adjust the situations such as layer for the moment
Row rinses unfreezing, as shown in Figure 3.
As shown in figure 3, washover pipe includes washing pipe 6, vibration flusher 7, rinses insertion tool 8.Washing pipe 6 can be used commonly
Oil pipe or other job execution tubing strings, washing pipe 6 are connected to shaft bottom flushing tool 5 always from ground well head, are the masters of washover pipe
It forms.Rinse the bottommost that insertion tool 8 is located at washover pipe.It vibrates flusher 7 to be mounted on washover pipe, positioned at sand control
Between packer 1 and flushing insertion tool 8, the uniformly installation at regular intervals of a certain number of vibration flushers 7.
As shown in figure 4, being inserted into insertion tool 8 is rinsed inside flushing tool 5, realize that washover pipe stays well casing with sand control
Column docks.After docking in place, rinse insertion tool 8 and open switch inside flushing tool 5, make sand control stay the outer annular space 9 of well casing and
It is connected inside flush pipe.At this point, injecting flushing liquor from ground by annular space, flushing liquor flows through vibration 7 external flow passage 70 of flusher,
And promote to vibrate flusher 7 and vibrate, generate the liquid pressure Reeb of certain frequency, to stay the layer of sand c of annular space 9 outside well casing column into
Row vibratory impulse is loosened layer of sand c, reduces the rubbing action between sand；Flushing liquor is flow to by the hole on screen casing simultaneously
The annular space of screen casing and pit shaft is rinsed layer of sand c.Flushing liquor enters punching with sand by the flushing hole of flushing tool 5
Tubing string inner passage is washed, is finally recycled to ground, realizes the flushing unfreezing function that well casing column is stayed to sand control.
After flushing, reach flushing effect as shown in Figure 5, play out washover pipe, 5 internal switch of flushing tool at this time
Mechanism is again switched off.Tripping in fishing tool unseals sand control packer 1, and tubing string is disposably pulled out.
On the whole, screen sand control tubing string provided herein and its releasing method have the following technical effect that：
1) sand control of the invention stays well casing post part to form simple, and construction is simple；
2) the washover pipe part of the invention is formed simple, is easy to light maintenance Job Operations；
3) function being rinsed to 9 layer of sand c of annular space outside screen casing can be achieved using the invention, relieve screen sand control tubing string
The risk being stuck realizes the salvaging of screen sand control tubing string underload, fast salvaging and controllable salvaging；
4) the flushing unfreezing sand control pipe, fishing only need light maintenance job mix to construct, greatly reduce screen casing
The salvage expenses of sand control pipe.
Herein cited any digital value all include between lower limiting value to upper limit value with the lower value of an incremented and
The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20
To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
68th, 43 to 51,30 to 32 is equivalent.For being less than 1 value, it is 0.0001,0.001,0.01,0.1 suitably to think a unit.
These are only intended to the example clearly expressed, it is believed that the numerical value enumerated between minimum and peak is possible to
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all scopes all include all numbers between endpoint and endpoint.It is used together with scope
" about " or " approximation " be suitable for two endpoints of the scope.Thus, " about 20 to 30 " are intended to covering " about 20 to about
30 ", including at least the endpoint indicated.
All articles and reference disclosed herein, including patent application and publication, for various purposes by helping
Draw and be hereby incorporated by.Describe combination term " substantially by ... forms " should including identified element, ingredient, component or step with
And other elements, ingredient, component or step essentially without the basic novel feature for influencing the combination.Use term "comprising"
Or " comprising " describes the combination of element here, ingredient, component or step it is also contemplated that substantially by these elements, ingredient, portion
The embodiment that part or step are formed.Here by using term " can with ", it is intended to illustrate described that " can with " includes
What attribute is all optional.
Multiple element, ingredient, component or step can be provided by single integrated component, ingredient, component or step.Optionally
Ground, single integrated component, ingredient, component or step can be divided into separated multiple element, ingredient, component or step.It is used for
The open "a" or "an" for describing element, ingredient, component or step is not said to exclude other elements, ingredient, component
Or step.
Above-mentioned each embodiment in this specification is described by the way of progressive, identical between each embodiment
Similar portion is cross-referenced, and what each embodiment stressed is and other embodiment difference.
The foregoing is merely several embodiments of the invention, although disclosed herein embodiment as above, institute
Content is stated only to facilitate the embodiment for understanding the present invention and using, is not intended to limit the present invention.Any institute of the present invention
Belong to those skilled in the art, do not depart from disclosed herein spirit and scope on the premise of, can be in embodiment
Formal and details on make any modification and variation, but the scope of patent protection of the present invention still must be with appended claims
Subject to the scope that book is defined.
Claims (10)
1. a kind of screen sand control tubing string, which is characterized in that including：Sand control stays well casing column and washover pipe, wherein,
The sand control stays well casing column to include successively from top to bottom：Sand control packer adjusts long light pipe, sand control screen, sand setting light pipe, punching
Instrument is washed, the flushing tool is provided with switching mechanism；
The washover pipe includes：Washing pipe, the vibration flusher being arranged on the washing pipe, with the flushing tool is mating rushes
Insertion tool is washed, the flushing insertion tool can open the switching mechanism when being inserted into the flushing tool；
When the sand control stays well casing column that sand card occurs, washover pipe described in tripping in, the punching in well casing column are stayed to the sand control
The switching mechanism that insertion tool opens the flushing tool is washed, the sand control stays annular space and the washover pipe outside well casing column
Inside connection, forms and rinses unfreezing circulation path.
2. screen sand control tubing string as described in claim 1, which is characterized in that the vibration flusher is located at sand control packing
Between device and the flushing insertion tool.
3. screen sand control tubing string as claimed in claim 2, which is characterized in that the number of the vibration flusher is more to be multiple
A vibration flusher, which is spaced a predetermined distance, to be uniformly arranged on the washing pipe.
4. screen sand control tubing string as claimed in claim 3, which is characterized in that the vibration flusher is provided with runner, described
Runner is located at outside the washing pipe, and when fluid flows through the runner, the vibration flusher can generate the liquid pressure of preset frequency
Reeb.
5. screen sand control tubing string as described in claim 1, which is characterized in that the sand control screen face oil reservoir pay interval.
6. screen sand control tubing string as claimed in claim 5, which is characterized in that thickness is big when having in the oil reservoir pay interval
When the interlayer of predetermined thickness, the light pipe faced with the interlayer is additionally provided in the sand control screen.
7. screen sand control tubing string as described in claim 1, which is characterized in that the length of the sand setting light pipe is 10 meters to 30 meters
Between.
8. screen sand control tubing string as described in claim 1, which is characterized in that the washing pipe is connected to well always from ground well head
The flushing tool at bottom, the flushing unfreezing circulation path are：The washover pipe and sand control stay the inner ring between well casing column
The hole of sky to the sand control screen flow to the outer annular space of the sand control screen and pit shaft to the flushing tool to the flushing
In tubing string, finally to ground.
9. a kind of releasing method based on screen sand control tubing string described in claim 1, which is characterized in that it includes：
When sand control stays well casing column that sand card occurs, tripping in washover pipe in well casing column is stayed to the sand control, realizes the flush pipe
Column stays well casing column to dock with the sand control；
After the washover pipe stays well casing column to dock in place with sand control, the switching on and shutting down that insertion tool opens flushing tool are rinsed
Structure makes the sand control that the annular space outside well casing column be stayed to be connected with the inside of the washover pipe, is formed and rinses unfreezing circulation path；
The annular space between well casing column is stayed to inject flushing liquor to the washover pipe and sand control so that vibration flusher generates liquid pressure
Reeb stays the sand control layer of sand of annular space outside well casing column to carry out vibratory impulse；Sand grains is cycled by the flushing unfreezing in well
Access returns to ground.
10. releasing method as claimed in claim 9, which is characterized in that after the completion of unfreezing is rinsed, further include：
Acting the washover pipe, the switching mechanism of flushing tool is again switched off, and tripping in fishing tool unseals sand control packer,
And tubing string is disposably pulled out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711178575.2A CN108119106A (en) | 2017-11-23 | 2017-11-23 | Screen sand control tubing string and its releasing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711178575.2A CN108119106A (en) | 2017-11-23 | 2017-11-23 | Screen sand control tubing string and its releasing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108119106A true CN108119106A (en) | 2018-06-05 |
Family
ID=62227939
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711178575.2A Pending CN108119106A (en) | 2017-11-23 | 2017-11-23 | Screen sand control tubing string and its releasing method |
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|---|---|
| CN (1) | CN108119106A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863899A (en) * | 2021-09-30 | 2021-12-31 | 新疆赢华石油技术服务有限公司 | Gas-proof sand-proof pumping aid for oil well |
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| WO2014019154A1 (en) * | 2012-08-01 | 2014-02-06 | 思达斯易能源技术(集团)有限公司 | Well flushing valve |
| CN203476272U (en) * | 2013-10-17 | 2014-03-12 | 张永光 | Hydraulic jet flow continuous vibration unfreezing device |
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|---|---|---|---|---|
| WO2014019154A1 (en) * | 2012-08-01 | 2014-02-06 | 思达斯易能源技术(集团)有限公司 | Well flushing valve |
| CN203476272U (en) * | 2013-10-17 | 2014-03-12 | 张永光 | Hydraulic jet flow continuous vibration unfreezing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863899A (en) * | 2021-09-30 | 2021-12-31 | 新疆赢华石油技术服务有限公司 | Gas-proof sand-proof pumping aid for oil well |
| CN113863899B (en) * | 2021-09-30 | 2023-03-28 | 新疆赢华石油技术服务有限公司 | Gas-proof sand-proof pumping aid for oil well |
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