CN107269724B - Semi-automatic torque coupling device - Google Patents
Semi-automatic torque coupling device Download PDFInfo
- Publication number
- CN107269724B CN107269724B CN201710445080.5A CN201710445080A CN107269724B CN 107269724 B CN107269724 B CN 107269724B CN 201710445080 A CN201710445080 A CN 201710445080A CN 107269724 B CN107269724 B CN 107269724B
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- Prior art keywords
- drilling
- spline
- shell
- upper shell
- torque coupling
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- 230000008878 coupling Effects 0.000 title claims abstract description 33
- 238000010168 coupling process Methods 0.000 title claims abstract description 33
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 2
- 230000001012 protector Effects 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 119
- 238000000034 method Methods 0.000 abstract description 22
- 230000008569 process Effects 0.000 abstract description 17
- 239000012530 fluid Substances 0.000 abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 6
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000003345 natural gas Substances 0.000 abstract description 3
- 239000003209 petroleum derivative Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 9
- 230000009471 action Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
Abstract
The invention relates to a semiautomatic torque coupling device in the field of petroleum and natural gas drilling devices. The device mainly comprises an upper shell, a protecting device, a pressure transmission hole, a pressure sensing device, a stepping motor, a fixed rib plate, a transmission shaft, a sealing device, a bypass hole, a spline shaft, a bearing, a lower shell and a spline leading-in body. In the drilling process, torque generated by ground equipment is transmitted to a drill bit at the bottom of a well along a drilling assembly, a semiautomatic torque coupling device is arranged in the drilling assembly according to a drilling design, and an operator remotely controls an internal motor to be opened or closed by using drilling fluid so as to control a spline shaft to extend or retract and lock, so that torque connection and disconnection are realized. The semiautomatic torque coupling device can effectively solve the problem of dragging pressure commonly existing in the well drilling process of complex-structure wells such as long horizontal section horizontal wells and large displacement wells, and has important significance for further reducing sliding friction resistance between a drilling tool assembly and a well wall, improving the smoothness of the well and improving the well drilling efficiency of the complex-structure wells.
Description
Technical Field
The invention relates to the fields of petroleum and natural gas drilling, coal bed gas drilling, geological exploration and mine drilling devices, in particular to a semiautomatic torque coupling device.
Background
In the drilling process of complex structure wells such as a directional well, a long horizontal section horizontal well, a high inclination well, a large displacement well and the like, torque generated by ground equipment is transmitted to a well bottom drill bit along a drill string to drive the drill bit to rotate for breaking rock, and the drilling of the complex structure well is mainly completed by combining two drilling modes of sliding drilling and compound drilling. The stable inclined well section mainly adopts compound drilling, namely the drilling tool assembly integrally rotates, at the moment, a friction pair between the drill string and the well wall belongs to rolling friction, and the friction resistance is small, so that the quick drilling is facilitated; the drilling mode of the pilot shaft section mainly adopts a sliding drilling system taking a mud motor as power to implement drilling operation in China, a power drilling tool drives a drill bit to rotate to break rock, a drill string does not rotate, but the drill string is laid down at the bottom of a well due to the action of dead weight, a friction pair between the drill string and a well wall belongs to sliding friction, so that frictional resistance is high, the drill bit is difficult to effectively apply drilling pressure, a 'decompression' phenomenon is caused, and the drilling efficiency is influenced. The foreign rotation steering drilling technology can completely overcome the friction problem during steering drilling, and research on the rotation steering drilling technology is actively carried out in China, but the foreign rotation steering drilling technology monopolizing and the limitation of key parts are not successfully applied to industrialization at present, and the comprehensive drilling cost is greatly increased only by imported or rented foreign company products. Although the integral rotary steering process of the drilling tool assembly is difficult to realize by the domestic complex structure well drilling process technology, based on the principle of the complex structure well drilling process, the drilling can be performed by adopting a method that one part of the drilling tool assembly rotates and the other part of the drilling tool assembly does not rotate (namely slides), the friction resistance in the drilling process can be greatly reduced, the influence of 'decompression' is reduced, the efficacy of the method is between that of the conventional drilling process technology and the advanced rotary steering drilling process technology, namely, the friction resistance can be further reduced compared with the conventional process technology, the drilling efficiency is improved, the cost is saved compared with the rotary steering drilling process, and the method is a practical process technology which is very suitable for the equipment conditions of the prior art in China. The analysis shows that the device has the function of connecting and disconnecting the torque of the drilling tool assembly in real time and the function of continuously transmitting the axial force, and is a key for realizing the process. Therefore, it is urgently needed to design an automatic torque coupling device which is precisely remotely controlled on the ground and can meet the drilling process requirements of wells with complex structures, and meanwhile, the automatic torque coupling device is simple in structure, low in cost and convenient to maintain.
Disclosure of Invention
The invention aims to furthest reduce the influence of friction resistance, fully exert the function of the traditional slurry power motor under the condition of no rotary steering drilling equipment, change the conventional full-sliding drilling mode into a partial rotary drilling mode, improve the efficiency of steering drilling construction operation, reduce the drilling cost, further improve the well body quality and the drilling safety of a well with a complex structure such as a directional well, a long horizontal section horizontal well, a high-inclination well, a large displacement well and the like, and provide a semiautomatic torque coupling device for the construction sites of petroleum and natural gas drilling, geological exploration and mine drilling.
The technical scheme adopted for solving the technical problems is as follows:
1. the semiautomatic torque coupling device comprises an upper shell 1, a protection device 2, a pressure sensing device 4, a stepping motor 5, a transmission shaft 7, a spline shaft 11 and a lower shell 14, wherein: the upper shell 1 and the lower shell 14 are coaxially and rotatably connected to form an outer shell, an inner convex edge is arranged at the middle section of the upper shell 1, and a spline groove is arranged on the inner wall of the joint part of the upper shell 1 and the lower shell 14 below the inner convex edge; the protecting device 2 is a barrel-shaped body with a closed upper end and an open lower end, a convex edge is internally projected at the lower end of the barrel-shaped body, the outside of the protecting device 2 is fixed above the inner convex edge of the upper shell 1 through a rib plate 6, a diversion channel is formed between the protecting device 2 and the upper shell 1, and a pressure transmission hole 3 is formed at the top or the outer side of the protecting device 2; the pressure sensing device 4 and the stepping motor 5 are fixed in the protecting device 2 below the pressure transmission hole 3; the transmission shaft 7 is connected to the lower end of the stepping motor 5; the upper part of the spline shaft 11 is provided with an outer convex edge and an inner blind plate, the outer convex edge of the spline shaft 11 is axially and limitedly matched with the inner convex edge of the lower end of the protecting device 2, the inner blind plate is axially and limitedly matched with the transmission shaft 7, the middle part of the spline shaft is provided with a bypass hole 9, a diversion channel between the protecting device 2 and the upper shell 1 and a central through hole below the blind plate of the spline shaft 11 are communicated through the bypass hole, the joint of the spline shaft 11 and the transmission shaft 7 adopts screw pair matching, the lower part of the spline shaft 11 is a diameter expanding section, the outer wall of the diameter expanding section is provided with a spline, and the spline forms plug-in matching with a spline groove on the inner wall of the joint of the upper shell 1 and the lower shell 14.
The above scheme further includes:
the upper shell 1 and the lower shell 14 are connected through a bearing 12 to form rotary sealing fit.
The spline guide 15 is formed at the top of the spline groove of the lower housing 14.
Sealing devices are respectively arranged at the joint parts of the spline shaft 11, the protection device 2, the upper shell 1 and the lower shell 14.
The space between the transmission shaft 7 and the spline shaft 11 is filled with lubricating oil.
The contact surfaces of the upper shell 1 and the lower shell 14 are embedded with wear-resistant sheets.
In the well drilling process of the complex structure, the semiautomatic torque coupling device is arranged in the drilling tool assembly according to the drilling design, when the drilling is carried out on a stable well section, ground operators input drilling fluid with pressure pulse frequency characteristics into the drilling tool assembly by using a drilling pump, when the drilling fluid enters the semiautomatic torque coupling device, the drilling fluid sequentially passes through an annulus between a protecting device and an upper shell, a side hole of the spline shaft, a lower shell and a drilling tool at the lower part, finally reaches a bottom hole, meanwhile, pressure pulse signals contained in the drilling fluid are transmitted to a pressure sensing device through a pressure transmission hole, after the pressure sensing device receives signals, a stepping motor is triggered to rotate so as to drive a transmission shaft to rotate, as a screw pair is matched between the transmission shaft and the spline shaft, the spline shaft starts to move downwards, under the guiding action of the spline guiding body of the lower shell, the spline shaft enters a lower shell spline, the spline shaft is also in spline matched with an upper shell, an anti-disengaging structure is designed between the upper part of the spline shaft and the protecting device, when the anti-disengaging structure contacts, namely, the spline shaft moves downwards to the lower shell and the lower shell, and simultaneously, the drilling fluid is completely connected with the upper shell through the upper shell, the upper shell and the upper shell is completely rotates, the drilling tool is closed, and the torque is completely transmitted to the upper shell through the upper shell, and the drilling tool is completely through the upper shell, and the upper shell is completely rotates, and the upper shell is completely, and the drilling shell is completely closed, and the drilling part is closed, and the drilling device is in the state, and the drilling device is completely is closed, and the drilling well is in the state The bearing between the upper shell and the lower shell, the lower shell is transmitted to the lower drilling tool until the drill bit; when the guiding well section is subjected to sliding drilling, according to the same operation method, only an operator utilizes different pressure signals contained in drilling fluid input by a drilling pump, after receiving the signals, a pressure sensing device in a semiautomatic torque coupling device triggers a stepping motor to drive a transmission shaft to reversely rotate so as to drive a spline shaft to upwards move, when the spline shaft moves upwards to a top dead center, the spline shaft is separated from a spline of a lower shell, the matching is released, a bypass hole on the spline shaft is completely opened, the drilling fluid flowing pressure is reduced, the ground drilling pump pressure is reduced, and therefore the semiautomatic torque coupling device can be judged to be in a separated state, and because a bearing is arranged between an upper shell and a lower shell, the upper shell can independently rotate relative to the lower shell, namely, the semiautomatic torque coupling device cannot transmit torque of an upper drilling tool to a lower drilling tool, but still can continuously transmit axial force, at the moment, the upper drilling tool realizes rotary drilling, and the lower drilling tool realizes sliding drilling, and achieves the purposes of keeping the guiding tool face stable and reducing the drilling friction resistance.
The on-site underground test result shows that the drilling efficiency can be averagely improved by 75.6% -96.8% by utilizing the semiautomatic torque coupling device, the drilling quality accords with the design standard, the purpose of completing the drilling construction of the well with the complex structure with low cost and high efficiency on the basis of the existing domestic equipment and process technology is achieved, the overseas technical monopoly is broken, and the powerful technical support is provided for improving the technical level and the international market competitiveness of the well with the complex structure in China.
Meanwhile, the semiautomatic torque coupling device has the characteristics of simple structural design, reliable performance, convenient operation and the like.
Drawings
FIG. 1 is a schematic diagram of a semi-automatic torque coupling device according to the present invention.
FIG. 2 is a schematic cross-sectional view of a semi-automatic torque coupling device A-A of the present invention.
Fig. 3 is a schematic diagram of the lower housing spline structure of the semiautomatic torque coupling device of the present invention.
In the figure: 1-upper shell, 2-protector, 3-pressure transmission hole, 4-pressure sensor, 5-step motor, 6-rib plate, 7-transmission shaft, 8-sealing device, 9-bypass hole, 10-sealing device, 11-spline shaft, 12-bearing, 13-sealing device, 14-lower shell and 15-spline lead-in body.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, the semiautomatic torque coupling device mainly comprises an upper housing 1, a protection device 2, a pressure transmission hole 3, a pressure sensing device 4, a stepping motor 5, a fixed rib plate 6, a transmission shaft 7, a sealing device 8, a bypass hole 9, a spline shaft 11, a bearing 12, a lower housing 14 and a spline lead-in body 15. The protecting device 2 is fixed inside the upper shell 1, the pressure sensing device 4 and the stepping motor 5 are arranged inside the protecting device 2, the pressure sensing device is arranged at the upper end of the stepping motor 5, the transmission shaft 7 is arranged at the lower end of the stepping motor 5, the fixed rib plate 6 is arranged between the protecting device 2 and the upper shell 1, the pressure transmission hole 3 is processed at the upper part of the protecting device 2, the transmission shaft 7 is connected to the upper part of the spline shaft 11, the sealing device 8 is arranged between the spline shaft 11 and the protecting device 2, the bypass hole 9 is processed on the spline shaft 11, the sealing device 10 is arranged between the spline shaft 11 and the upper shell 1, the bearing 12 and the sealing device 13 are arranged between the upper shell 1 and the lower shell 14, and the spline lead-in body 15 is processed at the upper part of the spline of the lower shell 14.
In the well drilling process of the well with the complex structure, the semiautomatic torque coupling device is arranged in the drilling tool assembly according to the drilling design, when the drilling tool assembly is subjected to compound drilling in a stable well section, a ground operator inputs drilling fluid with pressure pulse frequency characteristics into the drilling tool assembly by using a drilling pump, and when the drilling fluid enters the semiautomatic torque coupling device, the drilling fluid sequentially passes through an annulus between the protecting device 2 and the upper shell 1, a bypass hole 9 of the spline shaft 11, a central hole in the spline shaft and the lower shell 14, and then flows to a lower drilling tool, and finally reaches a well bottom drill bit.
Meanwhile, a pressure pulse signal contained in the drilling fluid is transmitted to the pressure sensing device 4 through the pressure transmission hole, after the pressure sensing device 4 receives the signal, the stepping motor 5 is triggered to rotate, and then the transmission shaft 7 is driven to rotate, because the transmission shaft 7 and the spline shaft 11 are in spiral pair fit, the spline shaft 11 starts to move downwards, under the guiding action of the lower shell spline guiding body 15, the spline shaft 11 enters the lower shell spline, and spline fit is also achieved between the spline shaft 11 and the upper shell 1. An anti-drop structure is designed between the upper part of the spline shaft 11 and the protecting device 2, when the anti-drop structure is in contact, namely, the spline shaft 11 descends to a lower dead point, complete matching is realized between the spline shaft 11 and a spline of the lower shell 14, meanwhile, the overflow area of the bypass hole 9 on the spline shaft 11 is shielded by the inner member of the upper shell 1 and is reduced, but is not completely closed, the reduction of the overflow area can cause the increase of the drilling fluid flowing pressure, the pressure of a ground drilling pump is increased, the semi-automatic torque coupling device can be judged to be in a closed state according to the phenomenon, the torque transmitted by the upper drilling tool is transmitted to the lower drilling tool through a spline pair formed among the upper shell 1, the spline shaft 11 and the lower shell 14, so that the drilling bit is driven to rotate to break the rock, and the axial force of the upper drilling tool is also transmitted to the lower drilling tool through the bearing 12 between the upper shell 1 and the lower shell 14 until the drilling bit.
When the guiding well section is subjected to sliding drilling, according to the same operation method, only an operator uses the difference of pressure signals contained in drilling fluid input by a drilling pump, after receiving the signals, the pressure sensing device 4 in the semiautomatic torque coupling device triggers the stepping motor 5 to drive the transmission shaft to reversely rotate so as to drive the spline shaft 11 to move upwards, when the spline shaft 11 moves upwards to a top dead center, the spline shaft 11 is separated from the lower shell 14, the cooperation is released, the bypass hole 9 on the spline shaft 11 is completely opened, the drilling fluid flowing pressure is reduced, and the ground drilling pump pressure is reduced, so that the semiautomatic torque coupling device can be judged to be in a separation state. Because the bearing 12 is arranged between the upper shell 1 and the lower shell 14, the upper shell 1 can rotate independently relative to the lower shell 14, namely, the semiautomatic torque coupling device can not transmit the torque of the upper drilling tool to the lower drilling tool, but still can continuously transmit the axial force, at the moment, the upper drilling tool realizes rotary drilling, and the lower drilling tool realizes sliding drilling, so that the aims of keeping the guiding tool surface stable and reducing the drilling friction resistance are achieved.
Claims (6)
1. Semi-automatic torque coupling device, including last casing (1), protector (2), pressure sensing device (4), step motor (5), transmission shaft (7), spline shaft (11) and lower casing (14), characterized by: the upper shell (1) and the lower shell (14) are coaxially and rotatably connected in a sealing way to form an outer shell, an inner convex edge is arranged at the middle section of the upper shell (1), and a spline groove is formed in the inner wall of the joint part of the upper shell (1) and the lower shell (14) below the inner convex edge; the protecting device (2) is a barrel-shaped body with a closed upper end and an open lower end, an inner convex edge is arranged at the lower end of the protecting device, the outside of the protecting device (2) is fixed above the inner convex edge of the upper shell (1) through a rib plate (6), a diversion channel is formed between the protecting device (2) and the upper shell (1), and a pressure transmission hole (3) is formed at the top or the outer side of the protecting device (2); the pressure sensing device (4) and the stepping motor (5) are fixed in the protective device (2) below the pressure transmission hole (3); the transmission shaft (7) is connected to the lower end of the stepping motor (5); the upper portion of the spline shaft (11) is provided with an outer convex edge and an inner blind plate, the outer convex edge of the spline shaft is in axial limiting fit with the inner convex edge of the lower end of the protecting device (2), the inner blind plate is in axial limiting fit with the transmission shaft (7), the middle of the inner blind plate is provided with a bypass hole (9), a diversion channel between the protecting device (2) and the upper shell (1) and a central through hole below the blind plate of the spline shaft (11) are communicated, a joint of the spline shaft (11) and the transmission shaft (7) is in spiral pair fit, the lower portion of the spline shaft (11) is an expanding section, a spline is arranged on the outer wall of the expanding section, and the spline and a spline groove on the inner wall of the joint of the upper shell (1) and the lower shell (14) form plug-in fit.
2. The semiautomatic torque coupling device according to claim 1, characterized in that: the upper shell (1) and the lower shell (14) are connected through a bearing (12) to form rotary sealing fit.
3. The semiautomatic torque coupling device according to claim 2, characterized in that: a spline lead-in body (15) is processed at the top of a spline groove of the lower shell (14).
4. A semiautomatic torque coupling device according to claim 1 or 2 or 3, characterized in that: sealing devices are respectively arranged at the joint parts of the spline shaft (11) and the protective device (2), and the upper shell (1) and the lower shell (14).
5. A semiautomatic torque coupling device according to claim 1 or 2 or 3, characterized in that: the space between the transmission shaft (7) and the spline shaft (11) is filled with lubricating oil.
6. A semiautomatic torque coupling device according to claim 1 or 2 or 3, characterized in that the contact surfaces of the upper housing (1) and the lower housing (14) are each provided with wear strips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445080.5A CN107269724B (en) | 2017-06-14 | 2017-06-14 | Semi-automatic torque coupling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710445080.5A CN107269724B (en) | 2017-06-14 | 2017-06-14 | Semi-automatic torque coupling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107269724A CN107269724A (en) | 2017-10-20 |
| CN107269724B true CN107269724B (en) | 2023-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710445080.5A Active CN107269724B (en) | 2017-06-14 | 2017-06-14 | Semi-automatic torque coupling device |
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| Country | Link |
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| CN (1) | CN107269724B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113090683B (en) * | 2021-04-15 | 2022-03-15 | 西南石油大学 | Mechanical oil gas drilling tool clutch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0520578A2 (en) * | 1991-06-27 | 1992-12-30 | Anadrill International SA | Surface adjustable bent housing |
| CN102747958A (en) * | 2012-07-23 | 2012-10-24 | 中国石油大学(华东) | Compound vibrating well-drilling tool |
| CN103510871A (en) * | 2012-06-21 | 2014-01-15 | 中国石油化工股份有限公司 | Complex structural well drag-reduction wrenching-reduction compound drilling method |
| CN105257212A (en) * | 2015-11-03 | 2016-01-20 | 西南石油大学 | Drilling tool with spinning coupling function and operating method of drilling tool |
| CN205370438U (en) * | 2015-12-31 | 2016-07-06 | 西南石油大学 | Gas drilling screw rod drilling tool of gas drive liquid self -loopa |
| CN207049216U (en) * | 2017-06-14 | 2018-02-27 | 中石化石油工程技术服务有限公司 | Semi-automatic torque couple device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7607496B2 (en) * | 2007-03-05 | 2009-10-27 | Robert Charles Southard | Drilling apparatus and system for drilling wells |
| US8789589B2 (en) * | 2009-12-21 | 2014-07-29 | Schlumberger Technology Corporation | Coiled tubing orienter tool with differential lead screw drive |
-
2017
- 2017-06-14 CN CN201710445080.5A patent/CN107269724B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0520578A2 (en) * | 1991-06-27 | 1992-12-30 | Anadrill International SA | Surface adjustable bent housing |
| CN103510871A (en) * | 2012-06-21 | 2014-01-15 | 中国石油化工股份有限公司 | Complex structural well drag-reduction wrenching-reduction compound drilling method |
| CN102747958A (en) * | 2012-07-23 | 2012-10-24 | 中国石油大学(华东) | Compound vibrating well-drilling tool |
| CN105257212A (en) * | 2015-11-03 | 2016-01-20 | 西南石油大学 | Drilling tool with spinning coupling function and operating method of drilling tool |
| CN205370438U (en) * | 2015-12-31 | 2016-07-06 | 西南石油大学 | Gas drilling screw rod drilling tool of gas drive liquid self -loopa |
| CN207049216U (en) * | 2017-06-14 | 2018-02-27 | 中石化石油工程技术服务有限公司 | Semi-automatic torque couple device |
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| Publication number | Publication date |
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| CN107269724A (en) | 2017-10-20 |
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