CN113802983A - Method for removing horizontal well debris bed - Google Patents
Method for removing horizontal well debris bed Download PDFInfo
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- CN113802983A CN113802983A CN202111110355.2A CN202111110355A CN113802983A CN 113802983 A CN113802983 A CN 113802983A CN 202111110355 A CN202111110355 A CN 202111110355A CN 113802983 A CN113802983 A CN 113802983A
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000005553 drilling Methods 0.000 claims abstract description 99
- 239000012530 fluid Substances 0.000 claims abstract description 49
- 239000011435 rock Substances 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 18
- 230000003449 preventive effect Effects 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000000518 rheometry Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 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
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- 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
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- 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
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- 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
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Abstract
The invention relates to a method for removing a horizontal well detritus 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 rheological property of the drilling fluid, and carrying sand in the drilling fluid for flowback; starting the inverted reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulating discharge capacity, the circulating time, the inverted reaming lifting speed and the inverted reaming well section, and taking preventive measures in the inverted reaming operation process to prevent complex situations; and finishing the removal of the horizontal well rock debris. The horizontal well sand removal device is used for solving the problem that horizontal wells are difficult to remove sand, and the horizontal well sand removal device adopts an inverted reaming process, and can effectively remove the detritus bed and prevent complex conditions from occurring 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 detritus bed.
Background
The effective removal of rock debris has been a difficult point for horizontal wells and highly deviated wells. The current means of removing cuttings are mainly increasing the cycle time, tripping the drill in short distance, adding a plurality of cuttings bed breakers in the downhole drilling tool, etc. The measures have the problem that rock debris is difficult to clean in the horizontal well, and are easy to induce complex conditions such as lost circulation, overflow, borehole wall instability and the like, so that hidden dangers are brought to smooth construction of subsequent operations (drilling, well logging and casing running).
At present, the back reaming measure is not applied to horizontal well sand removal, and related parameters and measures during back reaming cannot meet requirements for shaft cleaning, 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 horizontal well cuttings bed by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
Disclosure of Invention
The invention aims to provide a method for clearing a horizontal well detritus bed, which solves the problem that horizontal well sand removal is difficult.
The object of the invention is achieved by a method for removing a horizontal well cuttings bed, comprising,
a drilling tool connected with the top drive device is placed in a horizontal well, a drilling pump is started to circulate drilling fluid, the 6-turn reading of the rheological property of the drilling fluid is adjusted, and the drilling fluid is carried with sand and is discharged back; starting the inverted reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulating discharge capacity, the circulating time, the inverted reaming lifting speed and the inverted reaming well section, and taking preventive measures in the inverted reaming operation process to prevent complex situations; and finishing the removal of the horizontal well debris bed.
In a preferred embodiment of the present invention, the method for removing the horizontal well debris bed includes the following steps:
step a, a drilling tool connected with a top drive device of a wellhead is placed in a horizontal well;
b, starting a drilling pump to circulate the drilling fluid, adjusting the 6-turn reading of the rheological property of the drilling fluid, and adjusting and optimizing the circulation time: circularly observing the sand return condition, wherein large rock debris tide needs to be observed twice, and the sand return condition is clean;
step c, starting the back reaming operation: adjusting the top drive rotating speed and the circulating discharge capacity when the back reaming operation is started, lifting the drilling tool while rotating, and simultaneously keeping the pump-on circulating state to back reaming;
d, in the process of the back reaming operation, the rock debris bed is completely taken out from the lower edge of the shaft, and the top drive rotating speed, the back reaming lifting speed and preventive measures are adjusted according to the pump pressure and the torque;
and e, reversely reaming to the end well depth, circulating at least one delay time, and then performing conventional tripping.
In a preferred embodiment of the invention, in steps b and c, a 6-revolution reading of the top drive rotation speed and drilling fluid rheology is obtained according to the P-HAR rule, where P-HAR is the borehole diameter2Diameter of drilling tool2The borehole diameter is in inches and the tool 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 r/min.
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 r/min.
In a preferred embodiment of the present invention,
when P-HAR < 3.25, 6 turns reading (0.8-1.0) x wellbore diameter;
when P-HAR is greater than or equal to 3.25, 6 turns reading (1.0-1.2) x borehole diameter.
In a preferred embodiment of the present invention, in step c, the circulation displacement is determined according to the drilling fluid annulus return velocity, and the lowest drilling fluid annulus return velocity is 0.75 m/s.
In a preferred embodiment of the invention, the drilling fluid annulus return velocity is 1.0 m/s.
In a preferred embodiment of the present invention, in the step d, during the back reaming operation, after the pump pressure and the torque are stabilized, the speed of lifting the back reaming is increased from the initial speed to the first speed; when high torque occurs, the backreaming speed is slowed down.
In a preferred embodiment of the invention, the initial speed is 3m/min and the first speed is 6 m/min.
In a preferred embodiment of the present invention, in step d, the preventive measures include: when the pressure building or the torque fluctuation is large, the drilling tool is moved downwards, and the back reaming operation is recovered after the pump pressure and the torque are stable; when the pump is seriously held, the pump is immediately stopped, the pressure is relieved, 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 back reaming operation is performed to the interval of the formation-stabilized well with the well deviation of the first angle, and the interval of the well deviation of 0 ° to the first angle, and the conventional tripping operation is performed.
In a preferred embodiment of the present invention, the first angle is 30 °.
From the above, the method for removing the horizontal well detritus bed provided by the invention has the following beneficial effects:
according to the method for removing the horizontal well detritus bed, 6-turn reading of rheological property of drilling fluid is adjusted circularly, the horizontal well detritus bed is cleaned by adopting an inverted reaming process, and preventive measures of complex conditions are taken in the process by optimizing parameters such as top drive rotating speed, circulating discharge capacity, circulating time and inverted reaming lifting speed, so that detritus can be effectively removed and complexity can be prevented; provides safe well guarantee for subsequent construction, particularly special operation (such as casing, electrical measurement, screen pipe feeding, sliding sleeve feeding and the like).
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1: the method is a state diagram when drilling is carried out by back reaming in the method for removing the horizontal well debris bed.
FIG. 2: the cross-sectional view of figure 1 is shown with the drilling fluid in an ideal state.
FIG. 3: is a schematic cross-sectional view of figure 1 when the drilling fluid is too thick.
FIG. 4: is a schematic cross-sectional view of figure 1 when the drilling fluid is too dilute.
FIG. 5: is a state diagram during conventional drilling.
FIG. 6: is a state diagram of the cuttings migration in the method for clearing horizontal well cuttings beds of the present invention.
In the figure:
1. drilling tools; 2. horizontal wells; 3. cutting rock debris; 4. a drilling fluid high flow rate zone; 5. a blind area; 6. a viscous coupling region.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
The specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall 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," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique 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 present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a method for removing a horizontal well detritus bed, which comprises the following steps that a drilling tool 1 connected with a top drive device is placed in a horizontal well 2 (the original drilling tool in the horizontal well can be used, and the drilling tool can also be a drilling tool newly put into the well), a drilling pump (the prior art and not shown in the figure) is started to circulate drilling fluid, the 6-turn reading of the rheological property of the drilling fluid is adjusted (the specific range is determined by the P-HAR rule), and the drilling fluid is carried with sand and is discharged; starting the inverted reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulating discharge capacity, the circulating time, the inverted reaming lifting speed and the inverted reaming well section, and taking preventive measures in the inverted reaming operation process to prevent complex situations; and finishing the removal of the horizontal well debris bed.
According to the method for clearing the horizontal well detritus bed, 6-turn reading of rheological property of drilling fluid is adjusted circularly, the horizontal well detritus is cleared by adopting the inverted reaming process, and preventive measures of complex conditions are taken in the process by optimizing parameters such as top drive rotating speed, circulating discharge capacity, circulating time and inverted reaming lifting speed, so that the detritus bed can be effectively cleared while complexity is prevented; provides safe well guarantee for subsequent construction, particularly special operation (such as casing, electrical measurement, screen pipe feeding, sliding sleeve feeding and the like).
Further, the method for removing the horizontal well debris bed comprises the following steps:
step a, placing a drilling tool connected with a top drive device of a wellhead in a horizontal well, wherein the original drilling tool in the horizontal well can be used, or a new drilling tool 1 can be connected with the top drive device of the wellhead (the prior art and not shown in the figure), and the drilling tool 1 is put into a horizontal well 2;
b, starting a drilling pump to circulate the drilling fluid, adjusting the 6-turn reading of the rheological property of the drilling fluid (the specific range is determined by a P-HAR rule), and adjusting and optimizing the circulation time: circularly observing the sand return condition, wherein large rock debris tide needs to be observed twice, and the sand return condition is clean;
specifically, in the present embodiment, sand is returned by a vibrating screen.
A6-turn reading of the drilling fluid rheology was obtained according to the P-HAR (Hole-drill Area Ratio) rule, where P-HAR is the borehole diameter2Diameter of drilling tool2The borehole diameter is in inches and the tool diameter is in inches. Stirring the rock debris from the lower side of the shaft to a high flow rate area of the higher side of the shaft, and acting on a layer of thin film formed by the drilling fluid (mud) around the drilling tool, wherein the thin film can be called as viscous coupling; the high-speed rotation of the drilling tool is only a necessary factor for forming a viscous coupling area, and the other factor is 6-turn reading in the rheological property of the drilling fluid; the 6-turn reading represents the fluid performance of an annular area between an open hole section and a drilling tool, when drilling fluid (mud) is in an ideal state, a high flow velocity area 4 of the drilling fluid and a blind area 5 of a shaft section are moderate, a viscous coupling area 6 is moderate, and a schematic cross section diagram of reverse reaming operation is shown in figure 2; if the drilling fluid (mud) is too thick, the viscous coupling area 6 is large, the viscous coupling effect is good, but the drilling fluid high-flow-velocity area 4 is small, the dead zone 5 of the cross section of the shaft is too large, and the rock debris 3 cannot enter the high-flow-velocity area on the high side of the shaft, as shown in fig. 3; if the drilling fluid (mud) is too dilute, the viscous coupling area 6 is small, the viscous coupling effect is poor, the high flow velocity area 4 of the drilling fluid is large, the blind area 5 of the cross section of the shaft is small, and the rock debris 3 cannot be stirred to enter the high flow velocity area, as shown in fig. 4; the following rules were derived from the experiments:
when P-HAR < 3.25, 6 turns reading (0.8-1.0) x wellbore diameter;
when P-HAR is greater than or equal to 3.25, 6 turns reading (1.0-1.2) x borehole diameter.
Step c, starting the back reaming operation: adjusting the top drive rotating speed and the circulating discharge capacity when the back reaming operation is started, lifting the drilling tool while rotating, and simultaneously keeping the pump-on circulating state to back reaming;
the reaming is a term of petroleum drilling, and means that in order to ensure the roundness of a well hole during drilling, a drill bit with the same diameter as the original well hole is required to move up and down and rotate in the well. This type of wellbore conditioning operation is called reaming.
The hole needs to be reamed when the drill is in a blockage and before casing is put in or in a well section where well deviation is easy to happen. The back reaming is the operation of lifting the drilling tool while rotating.
Specifically, the top drive speed is obtained according to the P-HAR (borehole-drill Area Ratio) rule (as described above), and the magnitude of the P-HAR value determines the speed required for cleaning the borehole.
The P-HAR rule about the rotating speed and the rheological property is not only suitable for the process of cleaning the detritus bed by back reaming, but also suitable for the working conditions of drilling and circulation, and can also effectively reduce the accumulation of the detritus bed in the well hole.
In general, when the P-HAR is more than 6.5, the lowest top drive speed is 120 r/min; 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 r/min, and the optimal top drive rotating speed is 120 r/min.
The borehole diameter is in inches and the tool diameter is in inches.
In the step c, the circulation displacement is determined according to the drilling fluid annulus return speed of the borehole annulus, the lowest drilling fluid annulus return speed is 0.75m/s, and the optimal drilling fluid annulus return speed is 1.0 m/s.
D, in the process of the back reaming operation, the rock debris 3 is completely brought up from the bottom of the well, and the top drive rotating speed, the back reaming lifting speed and the prevention measures are adjusted according to the pump pressure and the torque;
during operation, the high-speed stirring of the drilling tool is used for bringing the rock debris on the low side of the well hole to the high-flow-rate drilling fluid area 4 and circulating the rock debris out of the well hole.
As shown in fig. 5, when the conventional elevator is lifted, without rotation and circulation, the drilling tool passes through the cuttings bed itself, and the cuttings are spread on the lower side of the well bore. As shown in fig. 1 and 2, when the back-reaming hole is drilled, the drilling tool rotates and circulates in the process of being lifted out, the rock debris is completely carried up from the bottom of the well, and the rock debris is deposited in a short distance from the lower drilling tool assembly after being transported to form a rock debris dune.
In the step d, during the back reaming operation, after the pump pressure and the torque are stable, the back reaming lifting speed is increased from the initial speed to the first speed for operation; when high torque occurs, the backreaming speed is slowed down. The pump pressure was carefully observed to prevent signs of pump holding.
In one embodiment of the invention, the initial speed of the lifting speed of the back reaming is 3m/min, and after the pump pressure and the torque are stable, the lifting speed of the back reaming is increased to the first speed of 6 m/min.
In step d, the preventive measures include: when the pressure build-up (namely the annular blockage phenomenon) or the torque fluctuation is large, the drilling tool is moved downwards, and the back reaming operation is recovered after the pump pressure and the torque are stable; when the pump is seriously blocked, the pump is immediately stopped, the pressure is released, and the drilling tool is moved downwards to relieve the pump blocking condition, and a specially-assigned person is required to prepare for pressure release.
And e, reversely reaming to the end well depth, circulating at least one delay time, and then performing conventional tripping. The state of the rock debris migration in the well is shown in figure 6;
specifically, the back reaming operation is carried out until the well deviation is a stratum stable well section with a first angle and a well deviation well section with a first angle of 0 degrees, and conventional tripping is carried out.
In one embodiment of the present invention, the first angle is 30 °. The cuttings can be suspended by means of the shearing force of the drilling fluid in the well section with the well inclination of 0-30 degrees, the cuttings can be taken out of the well hole through circulation, the cleaning efficiency of the cuttings is high, and back reaming is not needed any more.
In a specific embodiment of the invention, after two horizontal wells (the well depths are 5020m and 5034m respectively, and the horizontal section length is 1802m) are drilled, the original drilling tool is used for back reaming to remove rock debris, and casing is smoothly arranged in the whole process. The completion operation time of the two wells is 3.87 days and 3.83 days respectively, which is far lower than the completion operation time of the same block which is averagely 12 days.
Two wellsBorehole diameter of
A 4 "drill was used. The method for clearing the detritus bed by drilling the hole reversely comprises the following steps:
(1) the drilling fluid has a reading of 6 after 6 revolutions;
(2) the first 120m backward reaming speed is controlled to be 0.5-0.7m/min, and the later normal speed is controlled to be about 5 m/min;
(3) the top drive rotating speed is 80 r/min;
(4) the circulation displacement is 16-17L/s;
(5) reversely reaming into the casing (the well depth of the 30-degree well deviation position is 280m from the well depth of the upper casing shoe);
(6) and after the back reaming is finished, circulating for 1.5 cycles, and taking out the sand, and then pulling out the drill by using the elevator.
From the above, the method for removing the horizontal well detritus bed provided by the invention has the following beneficial effects:
according to the method for removing the horizontal well detritus bed, 6-turn reading of rheological property of drilling fluid is adjusted circularly, the horizontal well detritus bed is cleaned by adopting an inverted reaming process, and preventive measures of complex conditions are taken in the process by optimizing parameters such as top drive rotating speed, circulating discharge capacity, circulating time and inverted reaming lifting speed, so that detritus can be effectively removed and complexity can be prevented; provides safe well guarantee for subsequent construction, particularly special operation (such as casing, electrical measurement, screen pipe feeding, sliding sleeve feeding and the like).
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (13)
1. A method for removing horizontal well detritus bed is characterized by comprising the following steps,
a drilling tool connected with the top drive device is placed in a horizontal well, a drilling pump is started to circulate drilling fluid, the 6-turn reading of the rheological property of the drilling fluid is adjusted, and the drilling fluid is carried with sand and is discharged back; starting the inverted reaming operation in the horizontal well, adjusting and optimizing the top drive rotating speed, the circulating discharge capacity, the circulating time, the inverted reaming lifting speed and the inverted reaming well section, and taking preventive measures in the inverted reaming operation process to prevent complex situations; and finishing the removal of the horizontal well debris bed.
2. The method of removing horizontal well cuttings bed of claim 1, comprising the steps of:
step a, a drilling tool connected with a top drive device of a wellhead is placed in a horizontal well;
b, starting a drilling pump to circulate the drilling fluid, adjusting the 6-turn reading of the rheological property of the drilling fluid, and adjusting and optimizing the circulation time: circularly observing the sand return condition, wherein large rock debris tide needs to be observed twice, and the sand return condition is clean;
step c, starting the back reaming operation: adjusting the top drive rotating speed and the circulating discharge capacity when the back reaming operation is started, lifting the drilling tool while rotating, and simultaneously keeping the pump-on circulating state to back reaming;
d, in the process of the back reaming operation, the rock debris bed is completely taken out from the lower edge of the shaft, and the top drive rotating speed, the back reaming lifting speed and preventive measures are adjusted according to the pump pressure and the torque;
and e, reversely reaming to the end well depth, circulating at least one delay time, and then performing conventional tripping.
3. The method for removing horizontal well cuttings bed of claim 2, wherein in steps b and c, a 6-turn reading of top drive rotation speed and drilling fluid rheology is obtained according to the P-HAR rule, wherein the P-HAR value is the borehole diameter2Diameter of drilling tool2The borehole diameter is in inches and the tool diameter is in inches.
4. The method of removing horizontal well cuttings bed of claim 3,
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 r/min.
5. The method of removing horizontal well cuttings bed of claim 4,
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 r/min.
6. The method of removing horizontal well cuttings bed of claim 3,
when P-HAR < 3.25, 6 turns reading (0.8-1.0) x wellbore diameter;
when P-HAR is greater than or equal to 3.25, 6 turns reading (1.0-1.2) x borehole diameter.
7. The method for removing the horizontal well cuttings bed according to claim 2, wherein in the step c, the circulation displacement is determined according to the return velocity of the drilling fluid annulus, and the lowest return velocity of the drilling fluid annulus is 0.75 m/s.
8. The method of removing horizontal well cuttings bed of claim 7 wherein the drilling fluid annulus return velocity is 1.0 m/s.
9. The method for removing the horizontal well detritus bed according to claim 2, wherein in step d, the lifting speed of the back reaming is increased from the initial speed to the first speed after the pump pressure and the torque are stabilized during the back reaming operation; when high torque occurs, the backreaming speed is slowed down.
10. The method of removing horizontal well cuttings bed of claim 9, wherein the initial velocity is 3m/min and the first velocity is 6 m/min.
11. The method for removing horizontal well cuttings bed of claim 2, wherein in step d, the precautionary measure comprises: when the pressure building or the torque fluctuation is large, the drilling tool is moved downwards, and the back reaming operation is recovered after the pump pressure and the torque are stable; when the pump is seriously held, the pump is immediately stopped, the pressure is relieved, and the drilling tool is moved downwards to relieve the pump holding condition.
12. The method for removing the horizontal well cuttings bed of claim 2, wherein in step e, the back reaming operation is performed to the interval of the formation stabilizing well with the well deviation at the first angle and the interval of the well deviation from 0 ° to the first angle, and the conventional tripping is performed.
13. The method of clearing a horizontal well cuttings bed of claim 12 wherein the first angle is 30 °.
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Cited By (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 |
| CN116065950A (en) * | 2022-12-08 | 2023-05-05 | 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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Cited By (4)
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| 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 |
| WO2023124870A1 (en) * | 2021-12-31 | 2023-07-06 | 中国石油天然气集团有限公司 | Horizontal well cuttings bed processing method and device |
| CN116065950A (en) * | 2022-12-08 | 2023-05-05 | 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 |
| 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 |
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| CN113802983B (en) | 2024-06-18 |
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