CN113738299A - Downhole pipe column cutting tool - Google Patents
Downhole pipe column cutting tool Download PDFInfo
- Publication number
- CN113738299A CN113738299A CN202110951015.6A CN202110951015A CN113738299A CN 113738299 A CN113738299 A CN 113738299A CN 202110951015 A CN202110951015 A CN 202110951015A CN 113738299 A CN113738299 A CN 113738299A
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- CN
- China
- Prior art keywords
- gear shaft
- cutter
- transmission
- motor
- cutting
- 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.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 79
- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 230000033001 locomotion Effects 0.000 claims abstract description 14
- 238000003801 milling Methods 0.000 claims abstract description 14
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 238000004873 anchoring Methods 0.000 claims abstract description 9
- 239000000725 suspension Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Drilling And Boring (AREA)
Abstract
The invention discloses a downhole tubular column cutting tool which comprises an anchoring electric cylinder, an anchoring mechanism, a push broach electric cylinder, a tool shell, a motor shell, a hollow shaft downhole motor, a multistage planetary gear reducer, a cutting head rotating support, a cutter rotating transmission gear shaft, a spiral spline shaft, a cutter gear shaft frame, a transmission gear shaft, a guide cone, a milling disc, a cutter gear shaft suspension, a cutting head shell, a sawtooth-shaped push block, a cutter autorotation transmission hollow gear shaft, a cutter revolution transmission hollow shaft and a motor transmission wheel. The low-speed end of the motor drives the whole cutting head to revolve at a low speed through the multi-stage planetary reducer, and the high-speed end of the motor drives the transmission gear shaft and the cutter gear shaft to rotate at a high speed so as to drive the cutter to rotate at a high speed. The push-type electric cylinder pushes the sawtooth-shaped slide block to drive the spiral spline shaft to enable the cutter to complete the feeding motion. The invention can continuously cut the underground pipe column, has no pollution to the bottom of the well, and greatly improves the efficiency of pipe column cutting operation.
Description
Technical Field
The invention relates to a tool for cutting an underground pipeline, and belongs to the technical field of mechanical engineering or oil and gas engineering.
Background
Accidents such as drilling jamming of an oil pipe and a casing pipe column can occur in the well repairing process, the conventional oil well is usually unlocked in a mode of lifting the pipe column, but when the purpose cannot be achieved by the conventional unlocking means, the underground pipe column needs to be cut off to unlock the oil well.
The current common means for cutting off the underground pipe column comprise modes of mechanical cutting, energy-gathering cutting, chemical cutting and the like. The energy-gathering cutting utilizes special explosives to spray high-energy metal powder out so as to cut off the pipe column, and the pipe column cut by the mode is uneven in cutting, is not beneficial to subsequent recovery work and can cause pollution to the environment. Chemical cutting is to ignite an explosive bag mixed with mixed chemical agents and catalysts with current to expand chemical substances around, so that a pipe column is corroded to achieve the purpose of cutting, the cutting is not uniform due to homoaggregation, and the used chemical agents have extremely strong toxicity and can cause environmental pollution. The mechanical cutting is that the cutting tool of mechanical type is put down in the pit, thereby utilizes hydraulic pressure or electricity to drive the expansion cutter to cut the tubular column in the pit when rotary tool, and this kind of method is harmless to the environment, and the section after the cutting is even level and smooth, and cutting operation time is short, how to design a reliable mechanical cutting tool in pipeline narrow and small space, has important meaning to tubular column cutting in the pit of well workover in-process.
Disclosure of Invention
The invention aims to cut a pipe column by using a mechanical disc-shaped cutting structure, so that the environment is less polluted, the difficulty of workover recovery operation after cutting is reduced, and the cutting efficiency of the pipe column is improved.
The technical scheme adopted by the invention is as follows: a downhole tubular column cutting tool comprises a power supply, an anchoring electric cylinder, an anchoring mechanism, a push broach electric cylinder, a tool shell, a motor shell, a hollow shaft downhole motor, a multistage planet gear reducer, a cutting head rotating support, a cutting head shell, a cutter rotating transmission gear shaft, a spiral spline shaft, a transmission gear shaft sleeve, a cutter gear shaft frame, a transmission gear shaft, a cutter gear shaft sleeve, a guide cone, an end cover, a milling disc, a cutter gear shaft suspension, a cutting head shell, a zigzag push block, a cutter autorotation transmission hollow gear shaft, a cutter revolution transmission hollow shaft and a motor transmission wheel. The method is characterized in that: the two ends of the motor shell are respectively provided with threads, wherein the left thread of the motor shell is used for connecting the motor shell with the tool shell, the right thread of the motor shell is used for connecting the motor shell with the cutting head rotating support, and the middle position close to the right is provided with a speed reducer threaded hole for connecting the multistage planet wheel speed reducer with the motor shell through threads. The left thread of the cutter gear shaft frame is used for installing a transmission gear shaft sleeve, the right thread of the cutter gear shaft frame is used for installing a cutter gear shaft sleeve, a threaded hole is formed in the left position and used for installing a set screw to fix the circumferential positions of the transmission gear shaft sleeve and the cutter gear shaft frame, and the gear shaft hole of the cutter gear shaft frame is used for installing a cutter gear shaft and a transmission gear shaft respectively.
The motor output shaft rotates to enable the motor driving wheel to rotate synchronously, the right end of the motor driving wheel is connected with the multi-stage planetary gear reducer to further drive the cutter revolution transmission hollow shaft connected with the multi-stage planetary gear reducer, and the cutter revolution transmission hollow shaft transmits rotation to the cutting head shell and the cutter gear shaft suspension through screw connection, so that low-speed revolution of the cutting head is achieved.
The motor driving wheel is connected with the cutter autorotation transmission hollow gear shaft through a spline, the cutter autorotation transmission hollow gear shaft is used for transmitting the rotation of the motor to the cutter autorotation transmission gear shaft through gear meshing, the cutter autorotation transmission gear shaft drives the transmission gear shaft to rotate so as to drive the cutter gear shaft to rotate, the milling disc is arranged on the cutter gear shaft and rotates together to complete the autorotation of the cutter, and the autorotation of the cutter and the revolution of the cutting head simultaneously complete the rotary motion of pipe column cutting.
The push broach electric cylinder is connected with the sawtooth-shaped push block through threads, the sawtooth-shaped push block is in threaded engagement with the spiral spline shaft, axial movement of the sawtooth-shaped push block is converted into circumferential rotation of the transmission gear shaft sleeve, the transmission gear shaft sleeve drives the cutter gear shaft frame to rotate, and then the transmission gear shaft, the cutter gear shaft sleeve, the milling disc and the cutter gear shaft are driven to rotate together by taking the spiral spline shaft as a center to generate radial displacement, and feeding movement of the cutting device is completed. After the revolution of the cutting head and the autorotation of the cutter reach the speed required by cutting the pipe column, the feed motion of the cutting device drives the milling disc to be close to the pipe wall of the pipe column so as to finish the cutting process of the pipe column.
Drawings
FIG. 1 is an overall schematic view of a downhole string cutting apparatus
FIG. 2 is a schematic view of the cutting system
FIG. 3 is a schematic view of the structure of the motor housing
FIG. 4 is a schematic structural view of a tool gear carrier
In the figure: 1. a power source. 2. The electric cylinder is anchored. 3. An anchoring mechanism. 4. A push broach electric cylinder. 5. A tool housing. 6. Motor housing, motor housing left hand thread 6a, reduction gear screw hole 6b, motor housing right side screw thread 6 c. 7. A hollow shaft downhole motor. 8. Multistage planet wheel reduction gear. 9. The cutting head rotates the support. 10. A cutting head housing. 11. The cutter rotates to drive the gear shaft. 12. A helical spline shaft. 13. The transmission gear axle sleeve. 14. A tool gear shaft bracket, a tool gear shaft bracket left thread 14a, a threaded hole 14b, a tool gear shaft hole 14c, a transmission gear shaft hole 14d, a tool gear shaft hole 14c, and a tool gear shaft bracket right thread 14 e. 15. A gear shaft is driven. 16. Cutter gear shaft cover. 17. And (5) guiding a cone. 18. And (4) end covers. 19. And (5) milling the disc. 20. A cutter gear shaft. 21. Tool gear shaft suspension. 22. A cutting head housing. 23. A sawtooth-shaped push block. 24. The cutter autorotation drives the hollow gear shaft. 25. The cutter revolution transmission hollow shaft. 26. A motor driving wheel.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
1. As shown in fig. 1-4, a downhole tubular column mechanical cutting tool is composed of a power supply 1, an anchoring electric cylinder 2, an anchoring mechanism 3, a push-type broach electric cylinder 4, a tool housing 5, a motor housing 6, a hollow shaft downhole motor 7, a multi-stage planetary reducer 8, a cutting head rotating support 9, a cutting head housing 10, a cutter rotating transmission gear shaft 11, a spiral spline shaft 12, a transmission gear shaft sleeve 13, a cutter gear shaft frame 14, a transmission gear shaft 15, a cutter gear shaft sleeve 16, a lead cone 17, an end cover 18, a milling disc 19, a cutter gear shaft 20, a cutter gear shaft suspension 21, a cutting head housing 22, a sawtooth-shaped push block 23, a cutter rotation transmission hollow gear shaft 24, a cutter revolution transmission hollow shaft 25 and a motor driving wheel 26. The method is characterized in that: both ends have screw thread 6a and 6c respectively about motor housing 6, and wherein motor housing left side screw thread 6a is used for connecting being connected between motor housing and the tool case 5, and motor housing right side screw thread 6c is used for being connected of motor housing and cutting head runing rest 9, is equipped with reduction gear screw hole 6b on the step in motor housing (6) and is used for the threaded connection between multistage planet wheel reduction gear and the motor casing. The left end and the right end of a cutter gear shaft frame 14 are respectively provided with threads, a left thread 14a of the cutter gear shaft frame is used for installing a transmission gear shaft sleeve 13, a right thread 14e of the cutter gear shaft frame is used for installing a cutter gear shaft sleeve 16, a threaded hole 14b is formed in the left position and used for installing a set screw to fix the circumferential positions of the transmission gear shaft sleeve 13 and the cutter gear shaft frame 14, and gear shaft holes 14c and 14d of the cutter gear shaft frame are respectively used for installing a cutter gear shaft 20 and a transmission gear shaft 15.
The cutting motion of the cutter is divided into three parts: 1. revolution of cutting head, 2 rotation of cutter, 3 feeding of cutter.
The output shaft of the motor 7 rotates to enable the motor driving wheel 26 to synchronously rotate, the right end of the motor driving wheel 26 is connected with the multi-stage planetary gear reducer 8, and then the cutter revolution transmission hollow shaft 25 connected with the multi-stage planetary gear reducer 8 is driven, the cutter revolution transmission hollow shaft 25 transmits rotation to the cutting head shell 10 and the cutter gear shaft suspension 21 through screw connection, and therefore low-speed revolution of the cutting head is achieved.
The motor driving wheel 26 is connected with the cutter rotation driving hollow gear shaft 24 through a spline, the cutter rotation driving hollow gear shaft 24 drives the rotation of the motor to be transmitted to the cutter rotation driving gear shaft 11 through gear meshing, the cutter rotation driving gear shaft 11 drives the driving gear shaft 15 to rotate so as to drive the cutter gear shaft 20 to rotate, the milling disc 19 is installed on the cutter gear shaft 20 to rotate together to complete the rotation of the cutter, and the rotation of the cutter and the revolution of the cutting head simultaneously perform the rotation motion for completing the cutting of the tubular column.
The push broach electric cylinder 4 is connected with a sawtooth-shaped push block 23 through threads, the sawtooth-shaped push block 23 is in threaded engagement with the spiral spline shaft 12, axial movement of the sawtooth-shaped push block 23 is converted into circumferential rotation of the transmission gear shaft sleeve 13, the transmission gear shaft sleeve drives the cutter gear shaft frame 14 to rotate, and then the transmission gear shaft 15, the cutter gear shaft sleeve 16, the milling disc 19 and the cutter gear shaft 20 are driven to rotate together by taking the spiral spline shaft 12 as a center so as to generate radial displacement, and feeding movement of the cutting device is completed. After the revolution of the cutting head and the rotation of the cutter reach the speed required by cutting the pipe column, the feed motion of the cutting device drives the milling disc 19 to be close to the pipe wall of the pipe column so as to finish the cutting process of the pipe column.
The above-described embodiments are intended to be illustrative of the present patent and not to limit the scope of the patent, and any equivalent changes and modifications that may be made by one skilled in the art without departing from the spirit and principles of the patent are intended to be covered by the present patent system.
Claims (5)
1. A downhole tubular column cutting tool comprises a power supply (1), an anchoring electric cylinder (2), an anchoring mechanism (3), a push broach electric cylinder (4), a tool shell (5), a motor shell (6), a hollow shaft downhole motor (7), a multi-stage planet gear reducer (8), a cutting head rotating support (9), a cutting head shell (10), a cutter rotating transmission gear shaft (11), a spiral spline shaft (12) and a transmission gear shaft sleeve (13), the cutter gear grinding machine comprises a cutter gear shaft frame (14), a transmission gear shaft (15), a cutter gear shaft sleeve (16), a guide cone (17), an end cover (18), a milling disc (19), a cutter gear shaft (20), a cutter gear shaft suspension (21), a cutting head shell (22), a sawtooth-shaped push block (23), a cutter autorotation transmission hollow gear shaft (24), a cutter revolution transmission hollow shaft (25) and a motor transmission wheel (26). The method is characterized in that: both ends have screw thread (6a) (6c) respectively about motor housing (6), wherein motor housing left hand thread (6a) are used for connecting being connected between motor housing and instrument shell (5), and motor housing right hand thread (6c) are used for being connected of motor housing and cutting head runing rest (9), are equipped with reduction gear screw hole (6b) on motor housing (6) the step and are used for the threaded connection between multistage planet wheel reduction gear and the motor casing.
2. A downhole string cutting tool according to claim 1, wherein: the left end and the right end of a cutter gear shaft frame (14) are respectively provided with threads, a left thread (14a) of the cutter gear shaft frame is used for installing a transmission gear shaft sleeve (13), a right thread (14e) of the cutter gear shaft frame is used for installing a cutter gear shaft sleeve (16), a threaded hole (14b) is formed in the position close to the left and is used for installing a set screw to fix the circumferential positions of the transmission gear shaft sleeve (13) and the cutter gear shaft frame (14), and gear shaft holes (14c) and (14d) of the cutter gear shaft frame are respectively used for installing a cutter gear shaft (20) and a transmission gear shaft (15).
3. A downhole string cutting tool as claimed in claim 1, wherein: an output shaft of the motor (7) rotates to enable a motor driving wheel (26) to synchronously rotate, the right end of the motor driving wheel (26) is connected with a multi-stage planetary gear reducer (8) for transmission, the motor transmission is transmitted to a cutter revolution transmission hollow shaft (25) through speed reduction, and the cutter revolution transmission hollow shaft (25) is connected through screws to transmit the rotation to a cutting head shell (10) and a cutter gear shaft suspension (21) so as to realize low-speed revolution of the cutting head.
4. A downhole string cutting tool as claimed in claim 1, wherein: the motor driving wheel (26) is connected with the cutter rotation driving hollow gear shaft (24) through a spline, the cutter rotation driving hollow gear shaft (24) enables the rotation of a motor to be meshed through a gear, the rotation of the motor is transmitted to the cutter rotation driving gear shaft (11), the cutter rotation driving gear shaft (11) drives the driving gear shaft (15) to rotate so as to drive the cutter gear shaft (20) to rotate, the milling disc (19) is installed on the cutter gear shaft (20) to rotate together to complete the rotation of the cutter, and the rotation of the cutter and the revolution of the cutting head simultaneously complete the rotation motion of pipe column cutting.
5. A downhole string cutting tool as claimed in claim 1, wherein: the electric push broach cylinder (4) is connected with the sawtooth-shaped push block (23) through threads, the sawtooth-shaped push block (23) is in threaded engagement with the spiral spline shaft (12), axial movement of the sawtooth-shaped push block (23) is converted into circumferential rotation of the transmission gear shaft sleeve (13), the transmission gear shaft sleeve drives the cutter gear shaft frame (14) to rotate, and then the transmission gear shaft (15), the cutter gear shaft sleeve (16), the milling disc (19) and the cutter gear shaft (20) rotate together by taking the spiral spline shaft (12) as a center to generate radial displacement, and feeding movement of the cutting device is completed. After the revolution of the cutting head and the autorotation of the cutter reach the speed required by cutting the pipe column, the feed motion of the cutting device drives the milling disc (19) to approach the pipe wall of the pipe column so as to finish the cutting process of the pipe column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110951015.6A CN113738299A (en) | 2021-08-18 | 2021-08-18 | Downhole pipe column cutting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110951015.6A CN113738299A (en) | 2021-08-18 | 2021-08-18 | Downhole pipe column cutting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113738299A true CN113738299A (en) | 2021-12-03 |
Family
ID=78731712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110951015.6A Pending CN113738299A (en) | 2021-08-18 | 2021-08-18 | Downhole pipe column cutting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738299A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263220A (en) * | 2022-09-23 | 2022-11-01 | 西南石油大学 | Cutting tool in chuck anchoring type production string |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080236828A1 (en) * | 2007-03-26 | 2008-10-02 | Baker Hughes Incorporated | Tubular cutting device |
| CN101550811A (en) * | 2009-05-08 | 2009-10-07 | 深圳远东石油工具有限公司 | Lifting full water depth outer suspension clutch unlock underwater well head cutting recovery combined tool |
| CN103089181A (en) * | 2013-01-14 | 2013-05-08 | 中国石油大学(华东) | Hydraulic cutter in pipe |
| WO2017084226A1 (en) * | 2015-11-19 | 2017-05-26 | 北京美高科技发展有限公司 | Cable-type electrohydraulic control pipe cutting tool |
| US20190211641A1 (en) * | 2017-11-15 | 2019-07-11 | Terydon, Inc. | Down well pipe cutter having a plurality of cutting heads |
| CN211008532U (en) * | 2019-06-13 | 2020-07-14 | 中石化石油工程技术服务有限公司 | Electric cutting execution system for underground pipe column |
| CN111997554A (en) * | 2020-09-16 | 2020-11-27 | 中国海洋石油集团有限公司 | Deep well oil casing cutting tool |
| CN112081550A (en) * | 2019-06-13 | 2020-12-15 | 中石化石油工程技术服务有限公司 | Electric cutting execution system for underground pipe column |
| CN112815047A (en) * | 2019-11-17 | 2021-05-18 | 中石化石油工程技术服务有限公司 | Planetary gear reducer for electric cutting of underground pipe column |
| CN113182571A (en) * | 2021-04-30 | 2021-07-30 | 西南石油大学 | Underground milling cutter type oil pipe cutting device |
-
2021
- 2021-08-18 CN CN202110951015.6A patent/CN113738299A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080236828A1 (en) * | 2007-03-26 | 2008-10-02 | Baker Hughes Incorporated | Tubular cutting device |
| CN101550811A (en) * | 2009-05-08 | 2009-10-07 | 深圳远东石油工具有限公司 | Lifting full water depth outer suspension clutch unlock underwater well head cutting recovery combined tool |
| CN103089181A (en) * | 2013-01-14 | 2013-05-08 | 中国石油大学(华东) | Hydraulic cutter in pipe |
| WO2017084226A1 (en) * | 2015-11-19 | 2017-05-26 | 北京美高科技发展有限公司 | Cable-type electrohydraulic control pipe cutting tool |
| US20190211641A1 (en) * | 2017-11-15 | 2019-07-11 | Terydon, Inc. | Down well pipe cutter having a plurality of cutting heads |
| CN211008532U (en) * | 2019-06-13 | 2020-07-14 | 中石化石油工程技术服务有限公司 | Electric cutting execution system for underground pipe column |
| CN112081550A (en) * | 2019-06-13 | 2020-12-15 | 中石化石油工程技术服务有限公司 | Electric cutting execution system for underground pipe column |
| CN112815047A (en) * | 2019-11-17 | 2021-05-18 | 中石化石油工程技术服务有限公司 | Planetary gear reducer for electric cutting of underground pipe column |
| CN111997554A (en) * | 2020-09-16 | 2020-11-27 | 中国海洋石油集团有限公司 | Deep well oil casing cutting tool |
| CN113182571A (en) * | 2021-04-30 | 2021-07-30 | 西南石油大学 | Underground milling cutter type oil pipe cutting device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263220A (en) * | 2022-09-23 | 2022-11-01 | 西南石油大学 | Cutting tool in chuck anchoring type production string |
| CN115263220B (en) * | 2022-09-23 | 2022-12-13 | 西南石油大学 | Cutting tool in chuck anchoring type production pipe column |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211203 |
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| WD01 | Invention patent application deemed withdrawn after publication |