CN112627729B - Turbine type branch well reentry method and device - Google Patents
Turbine type branch well reentry method and device Download PDFInfo
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- CN112627729B CN112627729B CN202011502770.8A CN202011502770A CN112627729B CN 112627729 B CN112627729 B CN 112627729B CN 202011502770 A CN202011502770 A CN 202011502770A CN 112627729 B CN112627729 B CN 112627729B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000004873 anchoring Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 79
- 238000005452 bending Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/22—Handling reeled pipe or rod units, e.g. flexible drilling pipes
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
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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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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Abstract
The invention relates to a turbine type reentry method and a device for a branch well, which comprises an upper drill rod or oil pipe, a turbine section, a hydraulic anchor and a guider which are sequentially connected from top to bottom, wherein a guide hole is formed in the guider, a flexible rod penetrates through the guide hole, one end of the flexible rod is connected with a piston body, the other end of the flexible rod is connected with a guide head, the guide head can penetrate out of the guider along the guide hole, a spring is sleeved at one end of the flexible rod connected with the piston body, the piston body slides in a channel formed by the drill rod or oil pipe, an inner pipe of the turbine section and an inner cavity of the hydraulic anchor, a one-way cavity is axially formed on the top surface of the piston body, an upper pair of through holes and a lower pair of through holes are radially distributed in the one-way cavity, and the included angle of the two pairs of through holes is 90 degrees. The branch well reentry method provided by the invention is simple in operation method and rapid and efficient in identification. By using the method, the work of releasing the anchoring and guiding to other boreholes again can be finished in one time in the multilateral borehole, and the realization method is simple and reliable.
Description
Technical Field
The invention belongs to the field of drilling and production mechanical equipment in petroleum and natural gas engineering, relates to an underground operation method, and particularly relates to a method and a device for reentry of a branch well.
Background
The branch well is an effective means for improving the development efficiency of the oil field, and is a well with two or more branch well bores drilled from the side of one main well bore, so that the well spacing quantity is reduced, the development cost is reduced, and the single well yield and the oil and gas reservoir recovery ratio are improved. Because a plurality of branch well bores exist in the branch well, when various downhole tools are put into the well bottom after well completion, the various downhole tools need to re-enter the branch well bores by utilizing positioning guidance. If a plurality of branches exist in the branch well or a plurality of groups of tools need to be put in and put out, a large amount of energy and time are consumed to finish the loading and taking out work of the guiding tools, and huge consumption is caused to the underground operation cost of the oil-gas well.
Through patent search, the following related patent for disclosing invention are found
1. A multi-branch well later-period operation pipe column re-entering method (CN 101787856A) is characterized in that a guide groove is preset above a branch well hole by utilizing the principle that a guide key is matched with the guide groove, and an included angle formed by the guide groove and the branch well hole in projection on a horizontal plane is a guide angle. When a pipe column is put in, a bending guide shoe with a guide key and a certain angle is preset, and the included angle of the projection of the guide key and the bending guide shoe on the horizontal plane is equal to the guide angle. The guide key is matched with the guide groove when the pipe column is lowered, so that the bending guide shoe can be completed to enter the branch well hole, and the later-stage operation pipe column is guided to enter the branch well hole.
The method completes reentry operation of the multilateral well bore, but a guide sleeve needs to be preset in a main well bore in the early stage of operation, and the guide angle needs to be known, so that the guide sleeve needs to be conveyed into a preset position to be anchored by using a pipe column in the early stage of operation, and the guide angle is accurately measured. The operation procedures are complicated and time-consuming.
2. A selective well-bore reentry device and method (CN 104405318A) is disclosed, which is implemented by using three tools of a downhole permanent positioning tool, a main well-bore reentry guiding tool and a branch well-bore reentry guiding tool. The method comprises the steps of firstly putting an underground permanent positioning tool into a main well hole according to a certain angle, then putting the underground permanent positioning tool into the main well hole and then putting the underground permanent positioning tool into a guide tool again, enabling an annular guide inclined surface to face a branch well hole, then putting the underground permanent positioning tool into the branch well hole and then putting the underground permanent positioning tool into the guide tool again, and extending the annular guide inclined surface into the branch well hole from a side port under the guidance of the annular guide inclined surface so as to guide a post-operation pipe column to enter the branch well hole.
The method can selectively guide the operation pipe string to enter the main well bore or the branch well bore, but a positioning tool needs to be put in and positioned in the early stage of operation, so that operation construction is complicated and time-consuming. In addition, after the branch well bore re-entering operation is finished, a permanent positioning tool is still left in the main well bore, so that inconvenience is brought to other construction operations of the main well bore in the future.
3. A selective reentry method and apparatus (CN 1932231A) of the branched well, said method comprises making the selective reentry apparatus produce certain angle bending along certain direction by way of pressure drop, and then lower and rotate and reentry the tubular column slowly; the apparatus of the present invention guides the work string into the lateral wellbore when the bending lateral force conforms the bending orientation of the apparatus to the lateral wellbore.
The method is easy to implement, a guide device is not needed to be preset, the construction process is simplified, and the operation pipe column can be guided to enter the branch well hole to complete subsequent construction operation. But has the following disadvantages: (1) The time for the reentrant device to enter the branch well can not be judged, and the lower pipe column is easily twisted off under the rotating state of the upper pipe column; (2) After the reentrant device guides the reentrant pipe column to enter the branch well bore, the reentrant device is still positioned in the branch well bore and at the front end of the well bore, so that other construction operations in the branch well bore are not changed, and if repeated operations are required, the reentrant device needs to be lifted down for many times.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method and a device for reentry of a branch well, which are simple in operation method and rapid and efficient in identification. By using the method, the work of releasing the anchoring and guiding to other boreholes again can be finished in one time in the multilateral borehole, and the realization method is simple and reliable.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a device for reentering a branch well comprises an upper drill rod or oil pipe, a turbine section, a hydraulic anchor and a guider which are sequentially connected from top to bottom, wherein a guide hole is formed in the guider, a flexible rod penetrates into the guide hole, one end of the flexible rod is connected with a piston body, the other end of the flexible rod is connected with a seeker, the seeker can penetrate out of the guider along the guide hole, a spring is sleeved at one end of the flexible rod connected with the piston body, the piston body slides in a channel formed by the drill rod or oil pipe, an inner pipe of the turbine section and an inner cavity of the hydraulic anchor, a one-way cavity is axially formed in the top surface of the piston body, an upper pair of through holes and a lower pair of through holes are radially distributed in the one-way cavity, the upper through hole is used for starting the turbine, the lower through hole is used for anchoring and pressure relief of the hydraulic anchor, and the included angle between the two pairs of through holes is 90 degrees.
And, the turbine festival include stator group, rotor group, stator group be fixed in turbine outer tube inner wall including turbine outer tube, stator, rotor group include turbine inner tube, rotor, the rotor is fixed in turbine inner tube outer wall, rotor and stator meshing are equipped with into cistern and income liquid hole in turbine inner tube lower part, liquid can flow into the turbine festival through going into the cistern and going into the liquid hole, be equipped with out the liquid hole on turbine outer tube upper portion, liquid can flow out the turbine festival through going out the liquid hole.
And the stator group also comprises an outer tube end cover, one end of the turbine outer tube is connected with the outer tube end cover through threads, and the other end of the turbine outer tube is connected with the drill rod or the oil tube through threads.
And the rotor set also comprises an inner tube end cover, one end of the inner tube end cover is connected with the inner tube of the turbine through threads, and the other end of the inner tube end cover is connected with the hydraulic anchor through thread meshing.
The stator set and the rotor set are connected by upper and lower limit bearings.
Moreover, the using method of the device comprises the following steps:
(1) When the re-entering device is put into a target position, liquid is pumped into the pipe column to push the piston to descend;
(2) When the seeker butts against the sleeve, liquid is continuously pumped, so that the pressure in the sleeve is continuously increased, and the liquid continuously pushes the piston to move downwards and compress the spring;
(3) When the piston moves downwards to the upper through hole and is communicated with the liquid inlet groove of the inner pipe of the turbine, liquid in the cavity of the piston flows into the turbine section through the liquid inlet groove and the liquid inlet hole, the pressure in the upper pipe is reduced, the piston stops moving downwards, liquid is continuously pumped into the pipe column, the pressure of the liquid in the pipe column is kept balanced with the counterforce of the spring on the piston, and the position of the piston is unchanged;
(4) When liquid is continuously pumped into the pipe column, the liquid flows into a gap between the stator and the rotor of the turbine section through the pipe column, the piston cavity, the upper through hole, the liquid inlet groove of the inner pipe of the turbine and the liquid inlet hole of the inner pipe of the turbine, pushes the rotor to rotate, flows out from the liquid outlet hole of the outer pipe of the turbine and flows to the ground through the shaft and the annular space of the pipe column;
(5) When liquid flows to push the rotor to rotate, the inner pipe of the turbine drives the piston and the guider, the guide head and the like in the lower pipe column to rotate together, at the moment, the upper pipe column and the outer pipe of the turbine do not rotate, only the lower pipe column of the turbine section rotates under the action of the liquid, and meanwhile, the pipe column is lifted;
(6) When the seeker enters a branch well hole, the pressure in the pipe is greater than the reaction force of the piston, the piston continues to move downwards, the upper through hole and the liquid inlet groove are staggered, liquid in the pipe column stops entering the turbine section, the turbine section stops working, and the rotor and the turbine inner pipe stop rotating;
(7) The pressure in the pipe continuously pushes the piston to move downwards until the lower through hole is communicated with a hydraulic anchor flow passage, and the hydraulic anchor is hydraulically anchored;
(8) And then, the pressure is pumped continuously, the piston is pushed to move downwards, and the bypass port is opened continuously for pressure relief.
The direction of the liquid reaction force received by the stator is the fastening direction of the threaded connection between the turbine outer pipe and the upper pipe column.
The invention has the advantages and positive effects that:
1. compared with CN 10178787856A, the device does not need to be positioned and prefabricated before the device is arranged. The invention utilizes the pipe column to directly put in the device, directly finishes the positioning of the guider in the guiding process, takes out the guiding head after the guider is anchored to finish the guiding operation, and the whole process can be finished only by putting in and taking out the pipe column once. The operation process is saved, and the time is saved.
2. Compared with CN104405318A, the invention does not need to put in a permanent positioning tool. After the guiding operation is finished, the anchoring of the guider can be released, and the reentry guiding operation of the next branch well bore is continuously finished. No material consumption of the underground device, cost saving and simple operation.
3. Compared with CN1932231A, the invention does not need to place the guide head at the front end of the reentry pipe column, and the reentry guide method is more reasonable, safe and reliable. The invention utilizes the turbine section to identify and judge the state of the guide head, thereby not only protecting the safety of the reentry pipe column, but also identifying whether the guide head enters the branch well. In the method, the guider and the guide head are put into the main shaft together, and the guide head is aligned with the branch well and accurately anchors the position of the guider. After the seeker is taken out, various tools can be put into the reentry pipe column according to the construction operation requirements, and the reentry pipe column is not limited by the front seeker.
4. Compared with the prior art represented by CN 10178787856A, CN104405318A and CN1932231A, the invention can carry out reentry guiding operation in the radial branch well and the ultra-short radius branch well. Because the branch well bores of the radial branch well and the branch well with the ultra-short radius are smaller, the bent guide shoes or the prefabricated bent guide heads adopted by the technology cannot enter smoothly, and large-size or complex tools cannot smoothly complete required operation in small-diameter well bores. The method provided by the invention can utilize the coiled tubing (the tool is a common tool for drilling and completing the radial horizontal well and has the diameter of about 1-2 inches) to complete the reentry guiding operation in the radial branch well and the ultra-short radius branch well of the small-diameter well, and the method is simple and reliable.
Drawings
FIG. 1 is a structural view of the present apparatus;
FIG. 2 is a block diagram of a turbine section;
FIG. 3a is a block diagram of the outer tube of the turbine;
FIG. 3b isbase:Sub>A cross-sectional view taken along line A-A of FIG. 3base:Sub>A;
FIG. 4a is a block diagram of the inner tube of the turbine;
FIG. 4B is a cross-sectional view taken along line B-B of FIG. 4 a;
FIG. 5 is a schematic view (initial) of the working state of the apparatus of the present method;
FIG. 6 is a schematic view of the working state of the apparatus of the method (pressurization, piston propulsion, and the seeker abutting against the borehole wall);
FIG. 7 is a schematic view showing the operation state of the apparatus of the present method (continuing to move down the spring to compress and open the turbine);
FIG. 8 is a schematic view showing the operation of the apparatus according to the present method (rotating the lifting column);
FIG. 9 is a schematic view of the operation of the apparatus of the present method (addressing successful piston downstroke turbine closure);
FIG. 10 is a schematic view of the working state of the device of the present method (continuing to start the anchoring of the hydraulic anchor device in a downward direction);
FIG. 11 is a schematic view of the working state of the apparatus of the present method (continuing to move downward to open the bypass system for pressure relief);
FIG. 12 is a schematic view of the working state of the device (coiled tubing fishing) in the method.
Detailed Description
The present invention is further illustrated by the following specific examples, which are merely illustrative and not 2 limiting, and the scope of the present invention is not limited thereby.
A device for reentry into a branch well comprises an upper drill pipe or oil pipe 1, a turbine section 27, a hydraulic anchor 13, a guider 14 and a lower centralizer 17 which are sequentially connected from top to bottom. A centralizer 22 is sleeved outside the turbine section, an arc-shaped guide hole 16 is formed in the guider, a flexible rod 18 penetrates through the guide hole, one end of the flexible rod is connected with a piston body 21, and the other end of the flexible rod is connected with a guide head 15. The guide head can penetrate out of the guide device along the guide hole. And a spring 20 is sleeved at one end of the flexible rod connected with the piston body, and the piston body slides in a channel consisting of a drill rod or an oil pipe, a turbine section inner pipe, an upper centralizer inner cavity and a hydraulic anchor inner cavity. The top surface of the piston body is axially provided with a one-way cavity 24, an upper pair of through holes and a lower pair of through holes are radially distributed in the one-way cavity, the upper through hole 25 is used for starting the turbine, the lower through hole is used for anchoring and releasing the hydraulic anchor, and in order to avoid that the lower through hole is firstly communicated with the turbine in the descending process, the included angle between the two pairs of through holes is designed to be 90 degrees.
The turbine section include stator group, rotor group, stator group include turbine outer tube 2, stator 4, outer tube end cover 11, sealing ring 10, stator spacing ring 7, wherein turbine outer tube one end passes through threaded connection with drilling rod or oil pipe, the other end passes through threaded connection with the outer tube end cover, the stator is fixed in the outer tube inner wall, the sealing ring plays sealed and spacing function. The rotor set comprises a turbine inner tube 6, a rotor 5 and a rotor limiting ring 8, the rotor is fixed on the outer wall of the inner tube, the rotor is meshed with the stator, one end of the turbine inner tube is connected with an inner tube end cover 12 through threads, and the inner tube end cover is connected with the hydraulic anchor through threads in a meshed mode. The stator set is connected with the rotor set through upper and lower limiting bearings 3 and 9, and the upper and lower limiting bearings are used for transmitting axial force and realizing circumferential relative motion. The upper part of the outer pipe of the turbine is provided with a liquid outlet 26, and liquid can flow out of the turbine section through the liquid outlet. The lower part of the inner pipe of the turbine is provided with a liquid inlet groove and a liquid inlet hole 23, and liquid can flow into the turbine section through the liquid inlet groove and the liquid inlet hole.
A method for re-entering a branch well takes a radial horizontal well as an example, and comprises the following steps:
(1) When the re-entering device is put into the target position, liquid is pumped into the pipe column to push the piston to descend.
(2) When the guide head is abutted to the sleeve, the liquid is continuously pumped, so that the pressure in the sleeve is continuously increased. The liquid continues to push the piston down and compress the spring.
(3) When the piston moves downwards to the upper through hole and is communicated with the liquid inlet groove of the inner pipe of the turbine (the liquid inlet groove and the lower through hole are not communicated in a direction of 90 degrees), liquid in the cavity of the piston flows into the turbine section (between the inner pipe of the turbine and the outer pipe of the turbine) through the liquid inlet groove and the liquid inlet hole, the pressure in the upper pipe is reduced, and the piston stops moving downwards. And continuously pumping liquid into the pipe column, keeping the balance between the pressure of the liquid in the pipe column and the reaction force of the spring borne by the piston, and keeping the position of the piston unchanged.
(4) When liquid is continuously pumped into the pipe column, the liquid flows into a gap between the stator and the rotor of the turbine section through the pipe column, the piston cavity, the upper through hole, the liquid inlet groove of the inner pipe of the turbine and the liquid inlet hole of the inner pipe of the turbine, the liquid pushes the rotor to rotate, then the liquid flows out from the liquid outlet hole of the outer pipe of the turbine, and flows to the ground through the shaft and the annular space of the pipe column.
(5) When the liquid flows to push the rotor to rotate, the inner tube of the turbine drives the piston and the guider, the guide head and the like in the lower tubular column to rotate together. ( At the moment, the upper pipe column and the outer turbine pipe do not rotate, and only the lower pipe column of the turbine section rotates under the action of liquid. At the same time, the pipe column is lifted. Considering that the fluid generates reaction force on the stator, in order to avoid the tripping of the outer pipe of the turbine and the upper pipe column, the direction of the liquid reaction force borne by the stator is the fastening direction of the threaded connection of the outer pipe of the turbine and the upper pipe column. )
(6) When the seeker enters the branch well, the pressure in the pipe is larger than the reaction force of the piston, and the piston continues to move downwards, so that the upper through hole and the liquid inlet groove are staggered. And (4) stopping liquid in the pipe column from entering the turbine section, and stopping the turbine section (stopping the rotor and the inner pipe of the turbine).
(7) The pressure in the pipe continuously pushes the piston to move downwards until the lower through hole is communicated with a hydraulic anchor flow passage 19, and the hydraulic anchor is hydraulically anchored.
(8) And the pump injection pressure is continued, the piston is pushed to move downwards, and the bypass port 28 is continuously opened to release the pressure.
The reentry device and the reentry method are not limited to be applied to radial horizontal wells, and can be applied to all branch well types. Because the reentry difficulty of the radial horizontal well is the greatest, the reentry process of the radial horizontal well is taken as an example for explanation.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept, and these changes and modifications are all within the scope of the present invention.
Claims (6)
1. An apparatus for reentry into a lateral, comprising: the hydraulic anchor device comprises an upper drill rod or oil pipe, a turbine section, a hydraulic anchor and a guider which are sequentially connected from top to bottom, wherein a guide hole is formed in the guider, a flexible rod penetrates through the guide hole, one end of the flexible rod is connected with a piston body, the other end of the flexible rod is connected with a guide head, the guide head can penetrate out of the guider along the guide hole, a spring is sleeved at one end of the flexible rod connected with the piston body, the piston body slides in a channel formed by the drill rod or oil pipe, an inner pipe of the turbine section and an inner cavity of the hydraulic anchor, a one-way cavity is axially formed in the top surface of the piston body, an upper pair of through holes and a lower pair of through holes are radially distributed in the one-way cavity, the upper through holes are used for starting the turbine, the lower through holes are used for anchoring and releasing the hydraulic anchor, and the included angle between the two pairs of through holes is 90 degrees.
2. The apparatus of claim 1, wherein: the turbine festival include stator group, rotor group, stator group be fixed in turbine outer tube inner wall including turbine outer tube, stator, rotor group include turbine inner tube, rotor, the rotor is fixed in turbine inner tube outer wall, rotor and stator meshing are equipped with into cistern and income liquid hole in turbine inner tube lower part, liquid can flow into the turbine festival through going into the cistern and going into the liquid hole, be equipped with out the liquid hole on turbine outer tube upper portion, liquid can flow out the turbine festival through going out the liquid hole.
3. The apparatus of claim 2, wherein: the stator group further comprises an outer tube end cover, one end of the turbine outer tube is in threaded connection with the outer tube end cover, and the other end of the turbine outer tube is in threaded connection with the drill rod or the oil pipe.
4. The apparatus of claim 2, wherein: the rotor set further comprises an inner tube end cover, one end of the inner tube end cover is connected with the inner tube of the turbine through threads, and the other end of the inner tube end cover is connected with the hydraulic anchor through thread meshing.
5. The apparatus of claim 2, wherein: the stator set is connected with the rotor set through upper and lower limit bearings.
6. The apparatus of claim 1, wherein: the using method comprises the following steps:
(1) When the re-entering device is put into a target position, liquid is pumped into the pipe column to push the piston to descend;
(2) When the seeker butts against the sleeve, liquid is continuously pumped, so that the pressure in the sleeve is continuously increased, and the liquid continuously pushes the piston to move downwards and compress the spring;
(3) When the piston moves downwards to the upper through hole and is communicated with the liquid inlet groove of the inner pipe of the turbine, liquid in the cavity of the piston flows into the turbine section through the liquid inlet groove and the liquid inlet hole, the pressure in the upper pipe is reduced, the piston stops moving downwards, liquid is continuously pumped into the pipe column, the pressure of the liquid in the pipe column is kept balanced with the counterforce of the spring on the piston, and the position of the piston is unchanged;
(4) When liquid is continuously pumped into the pipe column, the liquid flows into a gap between the stator and the rotor of the turbine section through the pipe column, the piston cavity, the upper through hole, the liquid inlet groove of the inner pipe of the turbine and the liquid inlet hole of the inner pipe of the turbine, pushes the rotor to rotate, flows out from the liquid outlet hole of the outer pipe of the turbine and flows to the ground through the shaft and the annular space of the pipe column;
(5) When liquid flows to push the rotor to rotate, the inner pipe of the turbine drives the piston, the guider and the seeker in the lower pipe column to rotate together, at the moment, the upper pipe column and the outer pipe of the turbine do not rotate, only the lower pipe column of the turbine section rotates under the action of the liquid, and meanwhile, the pipe column is lifted;
(6) When the seeker enters a branch well hole, the pressure in the pipe is greater than the reaction force of the piston, the piston continues to move downwards, the upper through hole and the liquid inlet groove are staggered, liquid in the pipe column stops entering the turbine section, the turbine section stops working, and the rotor and the turbine inner pipe stop rotating;
(7) The pressure in the pipe continuously pushes the piston to move downwards until the lower through hole is communicated with a hydraulic anchor flow passage, and the hydraulic anchor is hydraulically anchored;
(8) And then, the pump is continuously used for injecting pressure, the piston is pushed to move downwards, and the bypass port is continuously opened for pressure relief.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011502770.8A CN112627729B (en) | 2020-12-18 | 2020-12-18 | Turbine type branch well reentry method and device |
| AU2021101670A AU2021101670A4 (en) | 2020-12-18 | 2021-03-31 | Method and device for reentry into turbo type multilateral well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011502770.8A CN112627729B (en) | 2020-12-18 | 2020-12-18 | Turbine type branch well reentry method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112627729A CN112627729A (en) | 2021-04-09 |
| CN112627729B true CN112627729B (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011502770.8A Active CN112627729B (en) | 2020-12-18 | 2020-12-18 | Turbine type branch well reentry method and device |
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| CN (1) | CN112627729B (en) |
| AU (1) | AU2021101670A4 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6945762B2 (en) * | 2002-05-28 | 2005-09-20 | Harbison-Fischer, Inc. | Mechanically actuated gas separator for downhole pump |
| EP2065553B1 (en) * | 2007-11-30 | 2013-12-25 | Services Pétroliers Schlumberger | System and method for drilling lateral boreholes |
| CN101660391B (en) * | 2008-08-29 | 2012-01-11 | 中国石油天然气集团公司 | Radial horizontal drilling device |
| CN103015979A (en) * | 2012-11-29 | 2013-04-03 | 中国石油集团长城钻探工程有限公司 | Tool and process for locating eye of branch well |
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2020
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| AU2021101670A4 (en) | 2021-05-20 |
| CN112627729A (en) | 2021-04-09 |
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