CN110863788A - Hydraulic bendable pen point device - Google Patents
Hydraulic bendable pen point device Download PDFInfo
- Publication number
- CN110863788A CN110863788A CN201911259465.8A CN201911259465A CN110863788A CN 110863788 A CN110863788 A CN 110863788A CN 201911259465 A CN201911259465 A CN 201911259465A CN 110863788 A CN110863788 A CN 110863788A
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- Prior art keywords
- bendable
- piston rod
- cam
- seat
- hydraulic
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- 238000003825 pressing Methods 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 230000008439 repair process Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 2
- 208000010392 Bone Fractures Diseases 0.000 description 7
- 210000002445 nipple Anatomy 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 208000007356 Fracture Dislocation Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000013589 supplement Substances 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
- E21B29/10—Reconditioning of well casings, e.g. straightening
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)
- Earth Drilling (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a hydraulic bendable pen point device which comprises an upper section fixing part and a lower section bendable deflection part, wherein the upper section fixing part comprises an upper barrel body, an upper joint and an upper connector, the upper joint and the upper connector are respectively in threaded connection with the upper end and the lower end of the upper barrel body, a hollow piston rod is connected in the upper barrel body in a sliding mode, a first nozzle is fixedly installed at the upper end of the piston rod, a spring is sleeved on the piston rod, the two ends of the spring are respectively in elastic contact with the piston rod and the upper barrel body, a cam seat is fixedly installed at the upper portion of an inner hole of the upper connector body, a cam is rotatably installed in the cam seat through a cam pin, and a supporting. The invention can realize the change of the lower part angle of the tool under different pump pressures, can once find the lower fracture of the oil casing of the faulted well and complete the cementing plugging operation, not only can improve the repair rate of the faulted well and reduce the well repair cost, but also has very important significance for the repair of the faulted oil and gas well in the oil field.
Description
Technical Field
The invention relates to a hydraulic bendable pen point device, and belongs to the technical field of well repairing tools.
Background
The hydraulic bendable pen point device is used for an oil field well repairing operation tool, and can cause damage of a plurality of underground oil casings in the middle and later periods of oil field exploitation, and damage conditions such as corrosion perforation of a pipe column, necking down of the pipe column, and dislocation of the pipe column exist. The pipe column dislocation is that the stratum rock slides under the action of shearing stress due to long production time, the oil casing is sheared to damage the oil casing, the fracture dislocation and translation phenomena are caused, and in order to successfully exploit underground oil and gas resources, the damaged pipe column needs to be repaired. The corrosion of the pipe column can supplement and connect the damaged part, the necking of the pipe column can perform expansion operation at the necking part of the inner hole, and the well repair of the broken pipe column is the well repair operation with the largest difficulty, low success rate and high cost, and particularly, no effective method is provided for the large-displacement broken well at present. In order to find the large-displacement translational fracture and perform repairing connection or blocking on the lower fracture, a special fracture searching tool is needed, and therefore a new tool, namely a hydraulic bendable pen point device, is developed for repairing the large-displacement fractured well.
Disclosure of Invention
Aiming at the problems of high difficulty, low success rate and high cost in the repair operation of the large-displacement fractured well, the invention provides the hydraulic bendable pen point device which is ingenious in structure, convenient to use, safe and reliable.
The technical scheme of the invention is as follows: a hydraulic bendable pen point device comprises an upper section fixing part and a lower section bendable deflection part, wherein the upper section fixing part comprises an upper barrel body, an upper joint and an upper connector, the upper joint and the upper connector are respectively in threaded connection with the upper end and the lower end of the upper barrel body, a hollow piston rod is connected in the upper barrel body in a sliding mode, a first nozzle is fixedly installed at the upper end of the piston rod, a spring is sleeved on the piston rod, two ends of the spring are respectively in elastic contact with the piston rod and the upper barrel body, a cam seat is fixedly installed at the upper portion of an inner hole of the upper connector body, a cam is rotatably installed in the cam seat through a cam pin, and a supporting seat; the lower bendable deflection part comprises a bendable short section which is rotatably arranged in the ball pressing seat through a short section pin and a lower connecting body which is connected with the lower end of the bendable short section through threads, the upper end of the bendable short section is in sliding fit with the cam through an inclined plane, a ball head which takes the short section pin as the center is arranged on the bendable short section, the ball head is simultaneously in sliding fit with the supporting seat and the ball pressing seat through spherical surfaces, an inner hole at the lower part of the ball pressing seat is an eccentric hole which extends to a second inner spherical surface, a lower barrel is in threaded connection with the lower end of the lower connecting body, a limiting seat is in threaded connection with the lower end of the lower barrel, a pen point which penetrates through the limiting seat is arranged in the lower barrel, the pen point is simultaneously in sliding fit with the lower barrel and the limiting seat, a second nozzle is fixedly arranged in the inner hole at the upper end of the pen point, the inner wall of the lower part of the lower barrel is provided with annular saw-shaped inverse teeth matched with the annular saw-shaped orthodontic teeth, the outer wall of the upper part of the pen point is provided with a shear pin groove, the outer wall of the lower barrel is in threaded connection with a shear pin, and the lower end of the shear pin is embedded into the shear pin groove.
Furthermore, a first inclined plane is arranged on the cam, a second inclined plane is arranged at the upper end of the bendable short section, and the first inclined plane is in sliding fit with the second inclined plane.
Furthermore, be provided with first interior sphere and second interior sphere on the inner wall of supporting seat and ball seat respectively, the bulb is simultaneously with first interior sphere and the interior sphere sliding fit of second.
Furthermore, a first elastic check ring tightly attached to the first nozzle is installed in an inner hole at the upper end of the piston rod, and a second elastic check ring tightly attached to the second nozzle is installed in an inner hole at the upper end of the pen point.
Furthermore, the side walls of the upper cylinder body and the lower cylinder body are respectively provided with a first balance hole and a second balance hole.
Furthermore, a blocking ring groove is formed in the outer wall of the pen point and located at the lower end of the elastic opening locking ring, and a half blocking ring is fixedly installed in the blocking ring groove.
Furthermore, a hard alloy layer is welded on the lower end face of the limiting seat.
Due to the adoption of the technical scheme, the invention has the advantages that: the hydraulic bendable pen point device provided by the invention deflects and bends the lower part of the tool under the condition of low pump pressure, bends at different angles under different pump pressures, shears the shear pin under high pump pressure, and extends outwards and deeply into the inner hole of the lower fracture tubular column, so that well repairing operations such as cementing plugging are realized. Therefore, the invention can realize the angle change of the lower part of the tool under different pump pressures, can once realize the finding of the lower fracture of the oil casing of the faulted well and the completion of the cementing plugging operation, not only can improve the repair rate of the faulted well and reduce the well repair cost, but also has very important significance for the repair of the faulted oil and gas well in the oil field.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the structure of the circular saw type orthodontic tooth engaged with the circular saw type counter tooth.
The labels in the figures are: 1-upper joint, 2-upper cylinder, 3-piston rod, 4-spring, 5-upper connector, 6-cam, 7-cam, 8-cam seat, 9-support seat, 10-bendable short section, 11-short section pin, 12-ball seat, 13-lower connector, 14-adjusting pad, 15-pen point, 16-elastic split locking ring, 17-split half stop ring, 18-lower cylinder, 19-limit seat, 20-shear pin, 21-first nozzle, 22-first elastic stop ring, 23-first balance hole, 24-first inclined plane, 25-second inclined plane, 26-first inner spherical plane, 27-second inner spherical plane, 28-ball head, 29-eccentric hole, 30-shear pin groove, 31-circular saw type orthodontic tooth, 32-retaining ring groove, 33-annular saw-shaped reverse tooth, 34-second balance hole, 35-hard alloy layer, 36-second nozzle and 37-second elastic retainer ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
The embodiment of the invention comprises the following steps: the hydraulic bendable pen point device is shown in fig. 1 and comprises an upper section fixing part and a lower section bendable deflection part, wherein the upper section fixing part comprises an upper barrel 2, an upper joint 1 and an upper connector 5 which are respectively connected with the upper end and the lower end of the upper barrel 2 in a threaded manner, a hollow piston rod 3 is connected in the upper barrel 2 in a sliding manner, a first nozzle 21 is fixedly installed at the upper end of the piston rod 3, a spring 4 is sleeved on the piston rod 3, two ends of the spring 4 are respectively in elastic contact with the piston rod 3 and the upper barrel 2, a cam seat 8 is fixedly installed at the upper part of an inner hole of the upper connector 5, a cam 6 is rotatably installed in the cam seat 8 through a cam pin 7, and a supporting seat 9 and a ball pressing seat; the lower section bendable deflection part comprises a bendable short section 10 which is rotatably installed in the ball pressing seat 12 through a short section pin 11 and a lower connecting body 13 which is connected to the lower end of the bendable short section 10 in a threaded mode, a first inclined plane 24 is arranged on the cam 6, a second inclined plane 25 is arranged at the upper end of the bendable short section 10, and the first inclined plane 24 is in sliding fit with the second inclined plane 25. The bendable short joint 10 is provided with a ball head 28 taking the short joint pin 11 as a center, the inner walls of the supporting seat 9 and the ball pressing seat 12 are respectively provided with a first inner spherical surface 26 and a second inner spherical surface 27, and the ball head 28 is in sliding fit with the first inner spherical surface 26 and the second inner spherical surface 27. The inner hole at the lower part of the ball pressing seat 12 is an eccentric hole 29 extending to the second inner spherical surface 27, the lower end of the lower connecting body 13 is in threaded connection with the lower barrel 18, the lower end of the lower barrel 18 is in threaded connection with the limiting seat 19, the pen tip 15 penetrating through the limiting seat 19 is installed in the lower barrel 18, the pen tip 15 is in sliding fit with the lower barrel 18 and the limiting seat 19 at the same time, the second nozzle 36 is fixedly installed in the inner hole at the upper end of the pen tip 15, the elastic opening locking ring 16 is sleeved outside the pen tip 15, the outer wall of the elastic opening locking ring 16 is provided with an annular saw-shaped positive tooth 31, the inner wall at the lower part of the lower barrel 18 is provided with an annular saw-shaped negative tooth 33 matched with the annular saw-shaped positive tooth 31, the outer wall at the upper part of the pen tip 15 is provided with a shear pin groove 30, the outer wall of the lower barrel 18. A first elastic check ring 22 closely attached to the first nozzle 21 is arranged in an inner hole at the upper end of the piston rod 3, and a second elastic check ring 37 closely attached to the second nozzle 36 is arranged in an inner hole at the upper end of the pen point 15, so that the nozzles are prevented from sliding in the working process. The side walls of the upper cylinder 2 and the lower cylinder 18 are respectively provided with a first balance hole 23 and a second balance hole 34. A ring blocking groove 32 is formed in the outer wall of the pen tip 15 and located at the lower end of the elastic opening locking ring 16, a half-dividing retaining ring 17 is fixedly installed in the ring blocking groove 32, and the elastic opening locking ring 16 is prevented from moving on the pen tip 15 through the half-dividing retaining ring 17. A hard alloy layer 35 is welded on the lower end face of the limiting seat 19.
The working principle of the invention is as follows:
before use, a certain distance is forged and milled at the staggered joint, and a sufficient deflection space is reserved for the hydraulic bendable pen point device during deflection bending. Connecting a hydraulic bendable pen point device at the lower part of a drill rod, feeding the tool hydraulic bendable pen point device into a forging and milling position with staggered ports by a drill, starting a pump and gradually increasing the pump pressure, when a fluid to be pumped flows through a first nozzle 21 on a piston rod 3, the fluid generates a certain pressure drop through the throttling action of the first nozzle 21, a first balance hole 23 of an upper cylinder body 2 is connected with an external annular space, the upper end surface of the piston rod 3 is a high pressure area of the fluid in the inner diameter of the tool, a step part of the piston rod 3 where a spring 4 is installed is connected with the external annular space through the first balance hole 23 to form a low pressure area, so that pressure difference also exists at two ends of the piston rod 3, the piston rod 3 can be pushed to compress the spring 4 to move downwards, when the lower part of the piston rod 3 is jointed with a cam 6 to continue to move downwards, the cam 6 rotates along a cam pin 7, and the pressure of a first inclined surface 24 of the cam 6, first inclined plane 24 and second inclined plane 25 relative slip to drive bendable nipple joint 10 and take place to rotate along stub pin 11, make first interior sphere 26 on the supporting seat 9 and press the second interior sphere 27 on the ball seat 12 simultaneously and take place to slide with the bulb 28 on the bent nipple joint 10, pump pressure increases along with the drilling, bendable nipple joint 10 deflects the angle increase, reach the biggest declination when bendable nipple joint 10 and the eccentric orfice 29 laminating of pressing ball seat 12, the bendable nipple joint 10 drives the bendable portion of turning of hypomere and also takes place to deflect in the in-process of deflecting. When the pumping pressure is gradually increased, the drill rod is tentatively rotated and lifted and lowered in a short distance, and when the lowering distance is increased, the lower part of the limiting seat 19 can be judged to be deep into the inner hole of the lower pipe, so that the lower fracture of the fault-finding broken pipe is completed. The pumping pressure is continuously increased, a certain pressure difference also exists at the two ends of the pen point 15 similarly, when the pumping pressure reaches a certain value, the shear pin 20 is sheared under the action of the pressure difference, the pen point 15 is pushed to move downwards, when the half-separating retaining ring 17 is attached to the upper end face of the limiting seat 19, the maximum moving stroke of the pen point 19 moving downwards is completed, referring to fig. 2, at the moment, the elasticity of the elastic opening locking ring 16 is released in a bound mode, the annular saw-shaped positive teeth 31 on the outer wall of the elastic opening locking ring 16 are meshed with the annular saw-shaped reverse teeth 33 on the lower barrel 18, the pen point 15 can be prevented from moving upwards when being pressed, at the moment, the front end of the pen point 15 penetrates into the deep inner diameter of the lower fracture of the pipe. When the pump is stopped, the compressed spring 4 is elastically released to push the piston rod 3 to move upwards, the pressure acting on the cam 6 is relieved, the drill rod is lifted upwards, and the lower section bendable deflection part is retracted after deflecting by an angle under the action of gravity, so that the whole well repairing operation can be completed by taking out the drill.
Claims (7)
1. The utility model provides a but hydraulic pressure nib device of buckling, includes upper segment fixed part and the bendable deflection portion of hypomere, its characterized in that: the upper-section fixing part comprises an upper barrel (2), an upper joint (1) and an upper connector (5), wherein the upper joint (1) and the upper connector (5) are respectively in threaded connection with the upper end and the lower end of the upper barrel (2), a hollow piston rod (3) is connected in the upper barrel (2) in a sliding mode, a first nozzle (21) is fixedly installed at the upper end of the piston rod (3), a spring (4) is sleeved on the piston rod (3), two ends of the spring (4) are respectively in elastic contact with the piston rod (3) and the upper barrel (2), a cam seat (8) is fixedly installed on the upper portion of an inner hole of the upper connector (5), a cam (6) is rotatably installed in the cam seat (8) through a cam pin (7), and a supporting seat (9) and a ball pressing; the lower bendable deflection part comprises a bendable short section (10) which is rotatably arranged in a ball pressing seat (12) through a short section pin (11) and a lower connecting body (13) which is connected with the lower end of the bendable short section (10) through a thread, the upper end of the bendable short section (10) is in slide fit with a cam (6) through an inclined plane, a ball head (28) which takes the short section pin (11) as the center is arranged on the bendable short section (10), the ball head (28) is simultaneously in slide fit with a supporting seat (9) and the ball pressing seat (12) through a spherical surface, an inner hole at the lower part of the ball pressing seat (12) is an eccentric hole (29) which extends to a second inner spherical surface (27), a lower barrel body (18) is in threaded connection with the lower end of the lower connecting body (13), a limiting seat (19) is in threaded connection with the lower end of the lower barrel body (18), a pen tip (15) which penetrates through the limiting seat (19) is arranged in the lower barrel body (18), and the pen tip (, the pen point is characterized in that a second nozzle (36) is fixedly mounted in an inner hole in the upper end of the pen point (15), an elastic opening locking ring (16) is sleeved outside the pen point (15), an annular saw-type orthodontic tooth (31) is arranged on the outer wall of the elastic opening locking ring (16), an annular saw-type counter tooth (33) matched with the annular saw-type orthodontic tooth (31) is arranged on the inner wall of the lower portion of the lower barrel (18), a shear pin groove (30) is formed in the outer wall of the upper portion of the pen point (15), a shear pin (20) is connected to the outer wall of the lower barrel (18) in a threaded mode, and the lower end of the shear pin (20) is embedded into the shear.
2. The hydraulic bendable pen tip device of claim 1, wherein: the cam (6) is provided with a first inclined plane (24), the upper end of the bendable short section (10) is provided with a second inclined plane (25), and the first inclined plane (24) is in sliding fit with the second inclined plane (25).
3. The hydraulic bendable pen tip device of claim 1, wherein: the inner walls of the supporting seat (9) and the ball pressing seat (12) are respectively provided with a first inner spherical surface (26) and a second inner spherical surface (27), and the ball head (28) is in sliding fit with the first inner spherical surface (26) and the second inner spherical surface (27) at the same time.
4. The hydraulic bendable pen tip device of claim 1, wherein: a first elastic retainer ring (22) tightly attached to the first nozzle (21) is installed in an inner hole in the upper end of the piston rod (3), and a second elastic retainer ring (37) tightly attached to the second nozzle (36) is installed in an inner hole in the upper end of the pen point (15).
5. The hydraulic bendable pen tip device of claim 1, wherein: the side walls of the upper barrel body (2) and the lower barrel body (18) are respectively provided with a first balance hole (23) and a second balance hole (34).
6. The hydraulic bendable pen tip device of claim 1, wherein: and a ring blocking groove (32) is formed in the outer wall of the pen point (15) and is positioned at the lower end of the elastic opening locking ring (16), and a half-dividing ring (17) is fixedly installed in the ring blocking groove (32).
7. The hydraulic bendable pen tip device of claim 1, wherein: and a hard alloy layer (35) is welded on the lower end face of the limiting seat (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911259465.8A CN110863788B (en) | 2019-12-10 | 2019-12-10 | Hydraulic bendable nib device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911259465.8A CN110863788B (en) | 2019-12-10 | 2019-12-10 | Hydraulic bendable nib device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110863788A true CN110863788A (en) | 2020-03-06 |
| CN110863788B CN110863788B (en) | 2023-11-28 |
Family
ID=69658709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911259465.8A Active CN110863788B (en) | 2019-12-10 | 2019-12-10 | Hydraulic bendable nib device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110863788B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154243A (en) * | 1991-07-26 | 1992-10-13 | Dudman Roy L | Bent sub |
| WO1994018429A1 (en) * | 1993-02-01 | 1994-08-18 | Magne Petter Nilsen | Sealing device for sealing of holes in the wall of a pipe in a curved oil well, an anchoring device for the sealing device and a tool for mounting of the sealing device and the anchoring device |
| CN2769505Y (en) * | 2005-02-23 | 2006-04-05 | 东营凯维石油科技有限责任公司 | Expanding antileaking flushing device |
| CN102635323A (en) * | 2011-03-14 | 2012-08-15 | 大庆油田有限责任公司 | Moveable combination of guide rod and milling cone |
| CN202441299U (en) * | 2012-03-08 | 2012-09-19 | 中国石油天然气股份有限公司 | Suspended fracture stabilizer |
| CN203022683U (en) * | 2012-12-26 | 2013-06-26 | 安东石油技术（集团）有限公司 | Composite rubber sleeve packer |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined-sand-washing and forced-sand-draining device |
| CN103643901A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Directional joint for well repairing and bushing removing in oil field |
| CN104912506A (en) * | 2015-06-24 | 2015-09-16 | 长江大学 | Variable bent joint |
| CN204960840U (en) * | 2015-09-14 | 2016-01-13 | 中国石油集团长城钻探工程有限公司 | Branch's well bendable toggle instrument |
| US20160160568A1 (en) * | 2011-08-05 | 2016-06-09 | Coiled Tubing Specialties, Llc | Steerable Hydraulic Jetting Nozzle, and Guidance System for Downhole Boring Device |
| CN108412445A (en) * | 2018-05-21 | 2018-08-17 | 中国石油天然气股份有限公司 | The special long conical surface looks for channel pen tip milling cone |
| CN110374536A (en) * | 2019-08-09 | 2019-10-25 | 新疆格瑞迪斯石油技术股份有限公司 | A kind of casing firing milling tool |
| CN211287584U (en) * | 2019-12-10 | 2020-08-18 | 贵州高峰石油机械股份有限公司 | Hydraulic bendable pen point |
-
2019
- 2019-12-10 CN CN201911259465.8A patent/CN110863788B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5154243A (en) * | 1991-07-26 | 1992-10-13 | Dudman Roy L | Bent sub |
| WO1994018429A1 (en) * | 1993-02-01 | 1994-08-18 | Magne Petter Nilsen | Sealing device for sealing of holes in the wall of a pipe in a curved oil well, an anchoring device for the sealing device and a tool for mounting of the sealing device and the anchoring device |
| CN2769505Y (en) * | 2005-02-23 | 2006-04-05 | 东营凯维石油科技有限责任公司 | Expanding antileaking flushing device |
| CN102635323A (en) * | 2011-03-14 | 2012-08-15 | 大庆油田有限责任公司 | Moveable combination of guide rod and milling cone |
| US20160160568A1 (en) * | 2011-08-05 | 2016-06-09 | Coiled Tubing Specialties, Llc | Steerable Hydraulic Jetting Nozzle, and Guidance System for Downhole Boring Device |
| CN202441299U (en) * | 2012-03-08 | 2012-09-19 | 中国石油天然气股份有限公司 | Suspended fracture stabilizer |
| CN203022683U (en) * | 2012-12-26 | 2013-06-26 | 安东石油技术（集团）有限公司 | Composite rubber sleeve packer |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined-sand-washing and forced-sand-draining device |
| CN103643901A (en) * | 2013-12-03 | 2014-03-19 | 中国石油天然气股份有限公司 | Directional joint for well repairing and bushing removing in oil field |
| CN104912506A (en) * | 2015-06-24 | 2015-09-16 | 长江大学 | Variable bent joint |
| CN204960840U (en) * | 2015-09-14 | 2016-01-13 | 中国石油集团长城钻探工程有限公司 | Branch's well bendable toggle instrument |
| CN108412445A (en) * | 2018-05-21 | 2018-08-17 | 中国石油天然气股份有限公司 | The special long conical surface looks for channel pen tip milling cone |
| CN110374536A (en) * | 2019-08-09 | 2019-10-25 | 新疆格瑞迪斯石油技术股份有限公司 | A kind of casing firing milling tool |
| CN211287584U (en) * | 2019-12-10 | 2020-08-18 | 贵州高峰石油机械股份有限公司 | Hydraulic bendable pen point |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110863788B (en) | 2023-11-28 |
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