CN113802983B - Method for removing rock debris bed of horizontal well - Google Patents
Method for removing rock debris bed of horizontal well Download PDFInfo
- Publication number
- CN113802983B CN113802983B CN202111110355.2A CN202111110355A CN113802983B CN 113802983 B CN113802983 B CN 113802983B CN 202111110355 A CN202111110355 A CN 202111110355A CN 113802983 B CN113802983 B CN 113802983B
- Authority
- CN
- China
- Prior art keywords
- back reaming
- speed
- top drive
- horizontal well
- drilling fluid
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000011435 rock Substances 0.000 title claims abstract description 43
- 238000005553 drilling Methods 0.000 claims abstract description 95
- 239000012530 fluid Substances 0.000 claims abstract description 49
- 238000005520 cutting process Methods 0.000 claims abstract description 26
- 239000004576 sand Substances 0.000 claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 230000003449 preventive effect Effects 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims description 3
- 238000000518 rheometry Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 206010042530 Superficial injury of eye Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
- E21B3/022—Top drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a method for removing a horizontal well cuttings bed, which comprises the steps of putting a drilling tool connected with a top drive device into a horizontal well, starting a drilling pump to circulate drilling fluid, adjusting 6-turn reading of drilling fluid rheological property, and carrying sand with the drilling fluid for flowback; starting the back reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulation displacement, the circulation time, the back reaming lifting speed and the back reaming well section, and taking preventive measures to prevent complex situations in the back reaming operation process; and (5) completing the removal of rock debris of the horizontal well. The invention is used for solving the problem of difficult sand removal of the horizontal well, adopts the back reaming process, and can effectively remove the rock debris bed and prevent the complex situation by optimizing parameters.
Description
Technical Field
The invention relates to the technical field of petroleum drilling, in particular to a method for removing a horizontal well cuttings bed.
Background
Effective removal of cuttings has been a challenge for horizontal wells and highly deviated wells. The current means for removing the rock cuttings are mainly to increase the circulation time, short-distance tripping, adding a plurality of rock cuttings bed breakers in the downhole drilling tool, and the like. The means have the problems that rock scraps are difficult to clean in a horizontal well, complex conditions such as lost circulation, overflow and well wall instability are easy to induce, and hidden dangers are brought to smooth construction of subsequent operations (drilling, logging and casing).
At present, the inverted reaming measure is not applied to the sand removal of a horizontal well, and related parameters and measures during inverted reaming cannot meet the requirements of cleaning a shaft, so that the sand removal effect is poor, and even secondary underground complex conditions and accidents are caused.
Therefore, the inventor provides a method for removing the rock debris bed of the horizontal well by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide a method for removing a rock debris bed of a horizontal well, which solves the problem of difficult sand removal of the horizontal well.
The object of the invention is achieved by a method of removing a bed of cuttings from a horizontal well, comprising,
A drilling tool connected with the top drive device is arranged in a horizontal well, a drilling pump is started to circulate drilling fluid, 6-turn reading of the rheological property of the drilling fluid is adjusted, and the drilling fluid carries sand and returns to the drainage; starting the back reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulation displacement, the circulation time, the back reaming lifting speed and the back reaming well section, and taking preventive measures to prevent complex situations in the back reaming operation process; and (5) completing the removal of the rock debris bed of the horizontal well.
In a preferred embodiment of the present invention, the method for removing the cuttings bed of the horizontal well comprises the following steps:
step a, a drilling tool connected with a top drive device of a wellhead is arranged in a horizontal well;
Step b, starting a drilling pump to circulate drilling fluid, adjusting 6-turn reading of drilling fluid rheological property, and adjusting and optimizing circulation time: the sand returning condition is observed circularly, two times of large rock debris tide are needed to be seen, and the sand returning is clean;
step c, starting the back reaming operation: adjusting the top drive rotating speed and the circulation displacement when the back reaming operation starts, lifting the drilling tool while rotating, and simultaneously keeping a pump-on circulation state to carry out back reaming;
d, in the process of the back reaming operation, the rock debris bed is completely taken out from the lower side of the shaft, the top drive rotating speed is adjusted according to the pump pressure and the torque, the speed of lifting on the back reaming is adjusted, and preventive measures are implemented;
And e, back reaming to the end of the well depth, and performing conventional tripping after at least one delay time.
In a preferred embodiment of the invention, in step b and step c, 6-turn readings of top drive rotational speed and drill fluid flow are obtained according to the P-HAR algorithm, wherein P-HAR value = wellbore diameter 2 ≡drill diameter 2, the wellbore diameter is in inches and the drill diameter is in inches.
In a preferred embodiment of the present invention,
When the P-HAR is more than 6.5, the lowest top drive rotating speed is 120 revolutions per minute;
when the P-HAR is more than or equal to 3.25 and less than or equal to 6.5, the lowest top drive rotating speed is 120 revolutions per minute;
When the P-HAR is less than 3.25, the lowest top drive rotating speed is 60-70 revolutions per minute.
In a preferred embodiment of the present invention,
When the P-HAR is more than 6.5, the top drive rotating speed is 180 revolutions per minute;
when the P-HAR is less than 3.25, the top drive rotating speed is 120 revolutions per minute.
In a preferred embodiment of the present invention,
When P-HAR < 3.25, 6-revolution reading= (0.8-1.0) x wellbore diameter;
when P-HAR is not less than 3.25, 6-turn reading= (1.0-1.2) x wellbore diameter.
In a preferred embodiment of the present invention, in step c, the circulating displacement is determined according to the drilling fluid annulus return speed, and the minimum drilling fluid annulus return speed is 0.75m/s.
In a preferred embodiment of the invention, the drilling fluid annulus return velocity is 1.0m/s.
In a preferred embodiment of the present invention, in the step d, when the back reaming operation is performed, after the pump pressure and the torque are stabilized, the speed of the back reaming operation is increased from the initial speed to the first speed; when high torque occurs, the back reaming speed is slowed down.
In a preferred embodiment of the present invention, the initial speed is 3m/min and the first speed is 6m/min.
In a preferred embodiment of the present invention, in step d, the preventive measures include: when the pressure is build up or the torque fluctuation is large, the drilling tool is moved downwards, and after the pumping pressure and the torque are stable, the back reaming operation is resumed; when the phenomenon of serious pump holding occurs, the pump is stopped immediately, the pressure is released, and the drilling tool is moved downwards to relieve the pump holding condition.
In a preferred embodiment of the present invention, in step e, the conventional tripping operation is performed to a formation-stabilizing interval with a first angle of inclination, and to an interval with an inclination of 0 ° to the first angle.
In a preferred embodiment of the present invention, the first angle is 30 °.
Therefore, the method for removing the horizontal well cuttings bed has the following beneficial effects:
According to the method for removing the rock debris bed of the horizontal well, disclosed by the invention, the 6-turn reading of the rheological property of the drilling fluid is circularly regulated, the rock debris bed of the horizontal well is cleaned by adopting the back reaming process, and the prevention measures of complex situations are adopted in the process by optimizing the parameters such as the top driving rotating speed, the circulating displacement, the circulating time and the back reaming lifting speed, so that the rock debris can be effectively removed and the complex occurrence can be prevented; the method provides safe well protection for subsequent construction, particularly special operation (such as casing, electrical measurement, screen-off, sliding sleeve-on and the like).
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
Fig. 1: the method is a state diagram of the back reaming and drilling process in the method for removing the cuttings bed of the horizontal well.
Fig. 2: is a schematic cross-sectional view of fig. 1 when the drilling fluid is ideal.
Fig. 3: the schematic cross-section of figure 1 is when the drilling fluid is too thick.
Fig. 4: the schematic cross-section of fig. 1 is when the drilling fluid is too dilute.
Fig. 5: is a state diagram at the time of conventional tripping.
Fig. 6: is a state diagram of cuttings migration in the method for removing the cuttings bed of the horizontal well.
In the figure:
1. Drilling tool; 2. a horizontal well; 3. rock debris; 4. a drilling fluid high flow rate zone; 5. a dead zone; 6. and an adhesive coupling region.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
The specific embodiments of the invention described herein are for purposes of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The invention provides a method for removing a horizontal well cuttings bed, which comprises the steps of placing a drilling tool 1 connected with a top drive device in a horizontal well 2 (an original drilling tool in the horizontal well can be used or a new drilling tool in the horizontal well can be used), starting a drilling pump (not shown in the drawing in the prior art) to circulate drilling fluid, adjusting a 6-turn reading of drilling fluid rheological property (a specific range is determined by a P-HAR rule), and carrying sand with the drilling fluid to carry out flowback; starting the back reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulation displacement, the circulation time, the back reaming lifting speed and the back reaming well section, and taking preventive measures to prevent complex situations in the back reaming operation process; and (5) completing the removal of the rock debris bed of the horizontal well.
According to the method for removing the rock debris bed of the horizontal well, disclosed by the invention, the 6-turn reading of the rheological property of the drilling fluid is circularly regulated, the rock debris of the horizontal well is removed by adopting the back reaming process, and the prevention measures of complex situations are adopted in the process by optimizing the parameters such as the top driving rotating speed, the circulation displacement, the circulation time and the back reaming lifting speed, so that the rock debris bed is effectively removed and the complex occurrence can be prevented; the method provides safe well protection for subsequent construction, particularly special operation (such as casing, electrical measurement, screen-off, sliding sleeve-on and the like).
Further, the method for removing the rock debris bed of the horizontal well comprises the following steps:
Step a, a drilling tool connected with a top drive device of a wellhead is placed in a horizontal well, an original drilling tool in the horizontal well can be used, a new drilling tool 1 can be connected with the top drive device (in the prior art, not shown in the figure) of the wellhead, and the drilling tool 1 is lowered into the horizontal well 2;
step b, starting a drilling pump to circulate drilling fluid, adjusting a 6-turn reading of the rheological property of the drilling fluid (a specific range is determined by a P-HAR rule), and adjusting and optimizing the circulation time: the sand returning condition is observed circularly, two times of large rock debris tide are needed to be seen, and the sand returning is clean;
specifically, in the present embodiment, sand is returned through the vibrating screen.
A 6-turn reading of the drilling fluid rheology is derived according to the P-HAR (Hole-Pipe Area Ratio) rule, where P-HAR value = borehole diameter 2 +.drilling tool diameter 2, the borehole diameter in inches and the drilling tool diameter in inches. Stirring the rock debris from the lower side of the well bore to the high flow rate region of the upper side of the well bore, and acting as a film of drilling fluid (mud) formed around the drilling tool, which film may be referred to as "viscous coupling"; while the high-speed rotation of the drilling tool is only one essential factor for forming a 'viscous coupling area', the other factor is a 6-turn reading in the rheological property of the drilling fluid; the reading number of 6 turns represents the fluid performance of an annular area between an open hole section and a drilling tool, when drilling fluid (slurry) is in an ideal state, a drilling fluid high-flow-rate area 4 and a blind area 5 of a shaft section are moderate, a viscous coupling area 6 is moderate, and a cross section schematic diagram of the back reaming operation is shown in figure 2; if the drilling fluid (slurry) is too thick, the viscous coupling area 6 is larger, the viscous coupling effect is good, but the high flow rate area 4 of the drilling fluid is smaller, the blind area 5 of the section of the shaft is too large, and the rock debris 3 cannot enter the high flow rate area on the high side of the shaft, as shown in fig. 3; if the drilling fluid (mud) is too thin, the viscous coupling area 6 is smaller, the viscous coupling effect is poor, the high flow rate area 4 of the drilling fluid is larger, the blind area 5 of the section of the shaft is smaller, and the rock fragments 3 cannot be stirred into the high flow rate area, as shown in fig. 4; the following rule is derived from the experiment:
when P-HAR < 3.25, 6-revolution reading= (0.8-1.0) x wellbore diameter;
when P-HAR is not less than 3.25, 6-turn reading= (1.0-1.2) x wellbore diameter.
Step c, starting the back reaming operation: adjusting the top drive rotating speed and the circulation displacement when the back reaming operation starts, lifting the drilling tool while rotating, and simultaneously keeping a pump-on circulation state to carry out back reaming;
reaming is a term of petroleum drilling, which means that in order to ensure the rounding of a borehole, a drill bit with the same diameter as the original borehole must be used to perform up-and-down and rotation movements in the borehole. This operation of trimming the wellbore is known as reaming.
The drilling is needed when the drilling is blocked, before the casing is put or in a well section where well deviation is easy to occur. The undercut is the operation of lifting the drilling tool while rotating.
Specifically, the top drive speed is derived according to the P-HAR (Hole-Pipe Area Ratio) rule (as described above), and the magnitude of the P-HAR value determines the speed of the speed required to clean the borehole.
The P-HAR rule about rotation speed and rheological property is not only suitable for the process of cleaning the rock debris bed by reversely scratching the eyes, but also suitable for drilling and circulating working conditions, and can also effectively reduce the accumulation of the rock debris bed in the well.
Typically, when P-HAR > 6.5, the minimum top drive speed is 120 rpm; the optimal top drive rotating speed is 180 revolutions per minute;
when the P-HAR is more than or equal to 3.25 and less than or equal to 6.5, the lowest top drive rotating speed is 120 revolutions per minute;
When the P-HAR is less than 3.25, the lowest top drive rotating speed is 60-70 rpm, and the optimal top drive rotating speed is 120 rpm.
The wellbore diameter is in inches and the drill diameter is in inches.
In the step c, the size of the circulating displacement is determined according to the drilling fluid annulus return speed of the well bore annulus, the minimum drilling fluid annulus return speed is 0.75m/s, and the optimal drilling fluid annulus return speed is 1.0m/s.
Step d, in the process of the back reaming operation, the rock debris 3 is completely brought up from the bottom of the well, the top drive rotating speed is adjusted according to the pump pressure and the torque, the speed of lifting the back reaming is adjusted, and preventive measures are implemented;
During operation, the wellbore low-side cuttings are brought into the high-flow-rate zone 4 of drilling fluid by high-speed agitation of the drilling tool and circulated out of the wellbore.
As shown in FIG. 5, when the conventional elevator is tripped, the drilling tool passes through the cuttings bed itself without rotation or circulation, and the cuttings are laid on the lower side of the borehole. As shown in fig. 1 and 2, when the back-reaming and tripping out are performed, the drilling tool rotates and circulates in the tripping out process, and the rock cuttings are completely carried up from the bottom of the well, and the rock cuttings are deposited in the position near the lower drilling tool assembly after being moved to form a rock cuttings dome.
In the step d, when the back reaming operation is performed, after the pump pressure and the torque are stable, the upward lifting speed of the back reaming operation is increased from the initial speed to the first speed; when high torque occurs, the back reaming speed is slowed down. The pump pressure was carefully observed to prevent signs of pump holding.
In one embodiment of the present invention, the initial rate of the upward rate of the undercut is 3m/min, and after the pump pressure and torque are stabilized, the upward rate of the undercut is increased to a first rate of 6m/min.
In step d, the precautions include: when the pressure is build up (namely annular blockage phenomenon) or torque fluctuation is large, the drilling tool is moved downwards, and after the pumping pressure and torque are stable, the back reaming operation is resumed; when serious pump-holding phenomenon occurs, the pump is stopped immediately, the pressure is released, the drilling tool is moved downwards to relieve the pump-holding condition, and special people are arranged to prepare for pressure release.
And e, back reaming to the end of the well depth, and performing conventional tripping after at least one delay time. The state of the rock debris moving in the well is shown in fig. 6;
Specifically, the back reaming operation is carried out to a stratum stable well section with the first angle of well deviation and a well section with the first angle of well deviation from 0 DEG to the first angle, so that conventional tripping is carried out.
In one embodiment of the invention, the first angle is 30 °. The well section with 0-30 degrees of well inclination can suspend the rock cuttings by means of the cutting force of drilling fluid, the rock cuttings can be brought out of the well bore through circulation, the cleaning efficiency of the rock cuttings is high, and inverted reaming is not needed.
In one embodiment of the invention, after two horizontal wells (the well depths are 5020m and 5034m respectively, and the horizontal section lengths are 1802 m) are drilled, the rock fragments are removed by using the original drilling tool in a reversely-reaming way, and the whole process of casing running is smooth. The completion time of the two wells is 3.87 days and 3.83 days respectively, which is far lower than the average completion time of 12 days of the blocks.
The diameter of the two wells isA 4 "drill is used. The method for removing the rock debris bed by the inverted scratch eye comprises the following steps:
(1) Drilling fluid 6 turns to reading "6";
(2) The back reaming speed of the first 120m is controlled to be 0.5-0.7m/min, and then the normal speed is controlled to be about 5 m/min;
(3) The rotation speed of the top drive is 80r/min;
(4) The circulation displacement is 16-17L/s;
(5) Chamfering the hole into the sleeve (the well depth of the 30 DEG well inclined position is 280m away from the well depth of the upper sleeve shoe);
(6) After the inverted reaming is finished, 1.5 circulating circumferential bands are cleaned, and then hanging cards are used for lifting the drill.
Therefore, the method for removing the horizontal well cuttings bed has the following beneficial effects:
According to the method for removing the rock debris bed of the horizontal well, disclosed by the invention, the 6-turn reading of the rheological property of the drilling fluid is circularly regulated, the rock debris bed of the horizontal well is cleaned by adopting the back reaming process, and the prevention measures of complex situations are adopted in the process by optimizing the parameters such as the top driving rotating speed, the circulating displacement, the circulating time and the back reaming lifting speed, so that the rock debris can be effectively removed and the complex occurrence can be prevented; the method provides safe well protection for subsequent construction, particularly special operation (such as casing, electrical measurement, screen-off, sliding sleeve-on and the like).
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (3)
1. A method for removing a horizontal well cuttings bed is characterized by comprising the following steps of,
A drilling tool connected with the top drive device is arranged in a horizontal well, a drilling pump is started to circulate drilling fluid, 6-turn reading of the rheological property of the drilling fluid is adjusted, and the drilling fluid carries sand and returns to the drainage; starting the back reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulation displacement, the circulation time, the back reaming lifting speed and the back reaming well section, and taking preventive measures to prevent complex situations in the back reaming operation process; completing the removal of the rock debris bed of the horizontal well;
The method comprises the following steps:
step a, a drilling tool connected with a top drive device of a wellhead is arranged in a horizontal well;
Step b, starting a drilling pump to circulate drilling fluid, adjusting 6-turn reading of drilling fluid rheological property, and adjusting and optimizing circulation time: the sand returning condition is observed circularly, two times of large rock debris tide are needed to be seen, and the sand returning is clean;
step c, starting the back reaming operation: adjusting the top drive rotating speed and the circulation displacement when the back reaming operation starts, lifting the drilling tool while rotating, and simultaneously keeping a pump-on circulation state to carry out back reaming;
In steps b and c, obtaining a top drive rotational speed and a 6-turn reading of drilling fluid rheology according to the P-HAR algorithm, wherein P-HAR value = borehole diameter 2 +.f. tool diameter 2, borehole diameter in inches and tool diameter in inches;
when the P-HAR is more than 6.5, the lowest top drive rotating speed is 120 revolutions per minute;
when the P-HAR is more than or equal to 3.25 and less than or equal to 6.5, the lowest top drive rotating speed is 120 revolutions per minute;
When the P-HAR is less than 3.25, the lowest top drive rotating speed is 60-70 revolutions per minute;
when P-HAR < 3.25, 6-revolution reading= (0.8-1.0) x wellbore diameter;
when the P-HAR is more than or equal to 3.25, 6-turn reading= (1.0-1.2) multiplied by the diameter of the well bore;
The size of the circulation displacement is determined according to the annular return speed of the drilling fluid, and the annular return speed of the lowest drilling fluid is 0.75m/s;
D, in the process of the back reaming operation, the rock debris bed is completely taken out from the lower side of the shaft, the top drive rotating speed is adjusted according to the pump pressure and the torque, the speed of lifting on the back reaming is adjusted, and preventive measures are implemented; in the step d, when the back reaming operation is performed, after the pump pressure and the torque are stable, the upward lifting speed of the back reaming operation is increased from the initial speed to the first speed; when high torque occurs, the back reaming speed is slowed down; the initial speed is 3m/min, and the first speed is 6m/min; in step d, the precautions include: when the pressure is build up or the torque fluctuation is large, the drilling tool is moved downwards, and after the pumping pressure and the torque are stable, the back reaming operation is resumed; when serious pump-holding phenomenon occurs, immediately stopping the pump, releasing pressure, and downwards moving the drilling tool to relieve the pump-holding condition;
step e, back reaming to the end of the well depth, and circulating at least one delay time before conventional tripping;
In the step e, carrying out back reaming operation until the stratum stable well section with the well inclination of a first angle and the well section with the well inclination of 0 DEG to the first angle are subjected to conventional tripping; the first angle is 30 °.
2. The method of removing a horizontal well cuttings bed of claim 1, wherein,
When the P-HAR is more than 6.5, the top drive rotating speed is 180 revolutions per minute;
when the P-HAR is less than 3.25, the top drive rotating speed is 120 revolutions per minute.
3. The method of removing a horizontal well cuttings bed of claim 1 wherein the drilling fluid annulus return rate is 1.0m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111110355.2A CN113802983B (en) | 2021-09-18 | 2021-09-18 | Method for removing rock debris bed of horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111110355.2A CN113802983B (en) | 2021-09-18 | 2021-09-18 | Method for removing rock debris bed of horizontal well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113802983A CN113802983A (en) | 2021-12-17 |
| CN113802983B true CN113802983B (en) | 2024-06-18 |
Family
ID=78896185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111110355.2A Active CN113802983B (en) | 2021-09-18 | 2021-09-18 | Method for removing rock debris bed of horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113802983B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382427A (en) * | 2021-12-31 | 2022-04-22 | 中国石油天然气集团有限公司 | Horizontal well debris bed treatment method and device |
| CN116065950B (en) * | 2022-12-08 | 2023-11-03 | 大庆石油管理局有限公司 | Intelligent drilling construction process based on oil gas development engineering driller surface layer construction |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4754819A (en) * | 1987-03-11 | 1988-07-05 | Mobil Oil Corporation | Method for improving cuttings transport during the rotary drilling of a wellbore |
| CN109162643B (en) * | 2018-10-19 | 2020-01-07 | 北京中海沃邦能源投资有限公司 | Drilling completion method for continuous shale reservoir |
| CN110230479A (en) * | 2019-06-12 | 2019-09-13 | 中国海洋石油集团有限公司 | A kind of clean control method of high angle hole oil base drilling fluid wellbore |
| CN111550185B (en) * | 2020-05-15 | 2022-06-07 | 洲际海峡能源科技有限公司 | Drilling method using screw and rotary steering tool combination system |
| CN111794700A (en) * | 2020-07-06 | 2020-10-20 | 中国石油天然气集团有限公司 | Method for removing long horizontal section detritus bed |
-
2021
- 2021-09-18 CN CN202111110355.2A patent/CN113802983B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 玛131示范区水平井井眼清洁技术研究;郭勇 等;新疆石油天然气;第15卷(第4期);第43-47页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113802983A (en) | 2021-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113802983B (en) | Method for removing rock debris bed of horizontal well | |
| US5402856A (en) | Anti-whirl underreamer | |
| CN108240196B (en) | Liner cementing method for controlling annular equivalent density of pressure sensitive stratum | |
| NO820038L (en) | PROCEDURE AND APPARATUS FOR AA REDUCE THE TENDENCE OF A DRILL STRENGTH TO ADOPT BECAUSE OF PRESSURE DIFFERENCES | |
| EP3775466B1 (en) | Wellbore drill bit nozzle | |
| CN109162643B (en) | Drilling completion method for continuous shale reservoir | |
| CN104912479A (en) | Method for drilling and completion of horizontal branched well for coal bed gas | |
| US6105675A (en) | Downhole window milling apparatus and method for using the same | |
| CN115596355A (en) | Borehole-while-drilling repairing tool and repairing method for easily-reduced stratum | |
| CN109322618B (en) | Method for completing drilling of heterogeneous shale gas well reservoir section | |
| CN107762408B (en) | Cave-making method for coal bed gas directional well | |
| CN109488212B (en) | Drilling and completion method in shale reservoir in drilling engineering | |
| CN112647849B (en) | Sea water deep drilling method for offshore drilling | |
| CN115711100A (en) | Method for finishing shaft treatment by using pointed bit milling cone | |
| Abahusayn et al. | Nikaitchuq extended-reach drilling: designing for success on the north slope of alaska | |
| CN118049159A (en) | Clean construction process method for drilling well hole of horizontal well | |
| Yang | Sidetracking process and application in Kuwait Burgan oilfield | |
| CN218644263U (en) | Drilling and scraping integrated wall scraper | |
| Alhaleem | Study the efficiency of drilling with casing operation in an Iraqi oil field | |
| CN103321576A (en) | Tubular column lowering power tractor with well grinding and repairing function | |
| Wastu et al. | CUTTING ANALYSIS ON HORIZONTAL DRIILING USING CUTTING CARRY INDEX, CUTTING TRANSPORT RATIO AND CUTTING CONCENTRATION IN ANNULUS METHOD ON A WELL G FIELD S | |
| Moellendick | Casing drilling improves mature field production, eliminates fluid losses, directionally drills wells | |
| RU2244794C1 (en) | Method for opening water-bearing horizons by a vertical well and device for realization of said method | |
| Arabi et al. | OPERATIONAL DECISION MAKING TO PREVENT STUCK-PIPE INCIDENTS IN ONE OF THE IRANIAN GAS FIELD; A CASE STUDY. | |
| Wilson | Rotation by Reciprocation Casing-Landing Technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230103 Address after: No. 1706, Shimao Building, No. 99, Mengzhuiwan Cross Street, Chenghua District, Chengdu, Sichuan 610000 Applicant after: ZHOUJI STRAIT ENERGY TECHNOLOGY Co.,Ltd. Applicant after: Intercontinental Strait Energy Technology (Beijing) Co.,Ltd. Applicant after: Intercontinental Strait Energy Technology (Wuhan) Co.,Ltd. Address before: 610051 no.1706, Shimao building, 99 mengzhuiwan Hengjie, Chenghua District, Chengdu, Sichuan Province Applicant before: ZHOUJI STRAIT ENERGY TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20231012 Address after: No. 1706, Shimao Building, No. 99, Mengzhuiwan Cross Street, Chenghua District, Chengdu, Sichuan 610000 Applicant after: ZHOUJI STRAIT ENERGY TECHNOLOGY Co.,Ltd. Applicant after: Intercontinental Strait Energy Technology (Beijing) Co.,Ltd. Address before: No. 1706, Shimao Building, No. 99, Mengzhuiwan Cross Street, Chenghua District, Chengdu, Sichuan 610000 Applicant before: ZHOUJI STRAIT ENERGY TECHNOLOGY Co.,Ltd. Applicant before: Intercontinental Strait Energy Technology (Beijing) Co.,Ltd. Applicant before: Intercontinental Strait Energy Technology (Wuhan) Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |