CN110130847B - Cable transmission downhole gear type tapping tool - Google Patents
Cable transmission downhole gear type tapping tool Download PDFInfo
- Publication number
- CN110130847B CN110130847B CN201910326272.3A CN201910326272A CN110130847B CN 110130847 B CN110130847 B CN 110130847B CN 201910326272 A CN201910326272 A CN 201910326272A CN 110130847 B CN110130847 B CN 110130847B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 19
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 16
- 239000010720 hydraulic oil Substances 0.000 claims description 15
- 238000003801 milling Methods 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004891 communication Methods 0.000 abstract description 3
- 239000002343 natural gas well Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 7
- 238000004873 anchoring Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 241000242541 Trematoda Species 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
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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
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
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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
- E21B23/14—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for displacing a cable or a cable-operated tool, e.g. for logging or perforating operations in deviated wells
-
- 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
-
- 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
- E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of petroleum and natural gas well completion, and particularly relates to a cable transmission underground gear type tapping tool which is characterized by comprising a tapper assembly arranged in a sleeve, an anchor connected with the tapper assembly through a pressing joint, and a hydraulic driving mechanism respectively connected with the tapper assembly and the anchor. The electric gear type casing windowing tool is safe, environment-friendly and efficient, is suitable for an electric gear type casing windowing tool of a production well, can realize the communication between the inside of a casing and the stratum, realizes the radial horizontal hole opening of the casing, has no damage to the casing, has no pollution to the stratum, has high construction efficiency and short period, and can realize multiple casing hole opening operations after the tool is put in one time.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas well completion, and particularly relates to a cable transmission underground gear type tapping tool.
Background
After drilling, a casing needs to be put in and cement is injected to seal and fix the well wall, and in order to achieve the purpose that reservoir oil gas flows into a shaft, the casing, a cement ring and a stratum close to the outside of the casing need to be hooked. At present, the common casing and stratum hooking mode at home and abroad is a shaped charge perforation mode, and the mode has the defects that high-temperature and high-pressure energy is generated in the perforation process, great impact is formed on a shaft, the casing and a cement sheath are inevitably damaged, the strength of the casing is reduced, and the service life of the casing is prolonged. Furthermore, the perforation can form a compaction effect on the surrounding stratum, the permeability of the reservoir is influenced, and the perforation fluid can pollute the surrounding stratum. In addition, gunpowder and shaped materials used in perforation belong to hazardous chemicals, and the storage and transportation cost is high. In addition to the hot processing technology of perforation, universal joint perforating technology appears in recent years, and the universal joint perforating technology adopts a hydraulic motor to drive a universal shaft to grind, mill and perforate a sleeve, and belongs to a cold processing technology. The technology has the advantages of high power, high construction cost and certain limitation in application, and has the defects of needing to pull up and pull down an oil pipe for operation and needing to be matched with a pump truck for construction.
Disclosure of Invention
The invention aims to provide a safe, environment-friendly and efficient cable transmission downhole gear type tapping tool, which realizes radial horizontal tapping of a casing and provides a new technical means for a production well to penetrate the casing.
The purpose of the invention is realized by the following technical scheme:
the invention discloses a cable transmission underground gear type tapping tool, which is characterized by comprising a tapper assembly arranged in a sleeve, an anchor connected with the tapper assembly through a pressing joint, and a hydraulic driving mechanism respectively connected with the tapper assembly and the anchor,
the hydraulic driving mechanism comprises a driving mechanism I and a driving mechanism II, the driving mechanism I comprises a micro motor, a cable connected with the micro motor, a hydraulic pump connected with the micro motor, a hydraulic oil tank connected with the hydraulic pump, an oil delivery pipe and an oil return pipe which are arranged on the hydraulic oil tank, the oil delivery pipe is connected with the anchor,
the driving mechanism II comprises a hydraulic motor, a three-way pipeline connected with the hydraulic motor, an overflow pipe connected with the three-way pipeline, a sidewall contact device connected with the three-way pipeline, and a transmission shaft connected with the hydraulic motor, a protective pipe is arranged outside the driving mechanism II,
the hole digger assembly comprises a body, a gland arranged on the body, a jacking piston arranged on the body, a spline shaft connected with the jacking piston through a connecting sleeve, a milling head arranged at the shaft end of the spline shaft, a big gear connected with the spline shaft, a small gear meshed with the big gear, a rolling bearing arranged between the gland and the big gear and respectively connected with the gland and the big gear, the jacking piston is connected with the connecting sleeve through a screw,
the transmission shaft is connected with the pinion,
the body in be equipped with several kinds of channels that flow through, including feed liquor hole and return liquid hole, the feed liquor hole with defeated oil pipe be connected, return liquid hole with return oil pipe be connected.
The sidewall contact device comprises a sidewall contact unit and a centering unit.
The anchor is internally provided with a filter cartridge which comprises an inner cylinder and an outer cylinder, and a hydraulic oil filter screen is arranged between the inner cylinder and the outer cylinder.
And a throttle valve is arranged on the liquid inlet hole.
The big gear and the small gear are bevel gears.
The invention has the advantages that:
(1) the cable transmission downhole gear type perforating tool is safe, environment-friendly and efficient, is suitable for an electric gear type casing windowing tool of a production well, can realize the communication between the inside of a casing and a stratum, realizes the radial horizontal perforation of the casing, has the diameter of a perforated hole not less than 30mm, is regular in perforated hole, has no damage to the casing, has no pollution to the stratum, has high construction efficiency and short period, and is suitable for the perforating operation of various steel-grade and wall-thickness casings; the tool can realize multiple casing tapping operations by one-time running, and a technical means is provided for the production well to penetrate the casing;
(2) the cable transmission downhole gear type tapping tool disclosed by the invention is conveyed by a cable to be lowered into a well, only a logging winch is matched with a minor repair operation machine, the construction is simple and convenient, the construction cost is low, an electric mode is adopted, the operation efficiency is high, the tool performance is reliable, and the tapping operation on casings with various sizes and wall thicknesses can be completed; with the deep development of oil fields, the technology can be widely applied.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the hole cutter assembly of the present invention.
Fig. 3 is a schematic structural diagram of the driving mechanism ii of the present invention.
FIG. 4 is a schematic view of the windowing process of the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1-4, the cable transmission downhole gear type tapping tool of the invention is characterized by comprising a tapper assembly 10 arranged in a casing 13, an anchor 8 connected with the tapper assembly 10 through a pressure joint 9, hydraulic driving mechanisms respectively connected with the tapper assembly 10 and the anchor 8,
the hydraulic driving mechanism comprises a driving mechanism I and a driving mechanism II, the driving mechanism I comprises a micro motor 2, a cable 1 connected with the micro motor 2, a hydraulic pump 3 connected with the micro motor 2, a hydraulic oil tank 4 connected with the hydraulic pump 3, an oil delivery pipe 5 and an oil return pipe 6 arranged on the hydraulic oil tank 4, the oil delivery pipe 5 is connected with the anchor 8,
the driving mechanism II comprises a hydraulic motor 11, a three-way pipeline 17 connected with the hydraulic motor 11, an overflow pipe 15 connected with the three-way pipeline 17, a sidewall contact 12 connected with the three-way pipeline 17, a transmission shaft 16 connected with the hydraulic motor 11, a protective pipe 14 is arranged outside the driving mechanism II,
the hole digger assembly 10 comprises a body 10-3, a gland 10-9 arranged on the body 10-3, a jacking piston 10-4 arranged on the body 10-3, a spline shaft 10-12 connected with the jacking piston 10-4 through a connecting sleeve 10-6, a milling head 10-11 arranged at the shaft end of the spline shaft 10-12, a big gear 10-13 connected with the spline shaft 10-12, a small gear 10-7 engaged with the big gear 10-13, a rolling bearing 10-10 arranged between the gland 10-9 and the big gear 10-13 and respectively connected with the gland 10-9 and the big gear 10-13, wherein the jacking piston 10-4 is connected with the connecting sleeve 10-6 through a screw 10-5,
the transmission shaft 16 is connected with the pinion 10-7,
the body 10-3 is internally provided with a plurality of overflowing passages comprising a liquid inlet hole 10-1 and a liquid return hole 10-8, the liquid inlet hole 10-1 is connected with the oil pipeline 5, and the liquid return hole 10-8 is connected with the oil return pipe 6.
The sidewall contact 12 comprises a contact unit 12-1 and a righting unit 12-2.
The anchor 8 is internally provided with a filter cartridge 7, the filter cartridge 7 comprises an inner cylinder and an outer cylinder, and a hydraulic oil filter screen is arranged between the inner cylinder and the outer cylinder.
The liquid inlet hole 10-1 is provided with a throttle valve 10-2.
The big gear 10-13 and the small gear 10-7 are bevel gears.
The invention is realized by the following technical scheme:
firstly, the gear type trepanning tool is put into a sleeve, the gear type trepanning tool is lowered to the target depth through a winch cable 1, an instruction is sent to a control unit of the underground micro trepanning tool in an electric control mode, and an underground direct current motor drives a hydraulic pump 3 to work through a speed reducer to pump hydraulic oil with certain pressure. The anchor 8 anchors the drilling tool on the casing 13, and simultaneously the jacking piston 10-4 is pushed to jack up by hydraulic pressure, so that the milling head 10-11 extends out in the radial horizontal direction to provide drilling weight for the milling head 10-11. The hydraulic motor 11 is arranged at the lower end of the hydraulic driving micro-hole opening tool, the hydraulic motor 11 drives the milling head 10-11 to rotate to cut the sleeve 13 through the gear pair, a micro hole with the diameter of about 35mm is formed in the sleeve 13, the jacking piston 10-4 is retracted under the hydraulic action after the window opening is completed, the milling head 10-11 is retracted into the tool, and the one-time sleeve window opening operation is completed. Through adjusting the lowering depth of the winch cable 1, the tool can be lowered for one time to realize multiple windowing operations of the casing 13 at different depths.
The upper end of the hydraulic tapping tool is connected with a cable 1 through a bridle; the balance protection cylinders are arranged outside the micro motor 2 and the control unit and are used for protecting the motor and components; the hydraulic pump 3 is through the hydraulic oil that inhales in the hydraulic tank 4, carry high-pressure hydraulic oil to hole digger assembly 10 through defeated oil pipe 5, and hole digger assembly 10 accessible hydraulic pressure force realizes the trompil operation to sleeve pipe 13. The anchor 8 has an anchoring function, and can realize anchoring of the hole-drilling tool by high pressure; a filter cylinder 7 is arranged in the anchor 8, the filter cylinder 7 consists of an inner cylinder and an outer cylinder, and a layer of filter screen with a certain mesh number is wrapped between the inner cylinder and the outer cylinder to play a role in filtering impurities of the hydraulic oil; the upper end of the pressing joint 9 is connected with the anchor 8, the lower end of the pressing joint is connected with the body 16 of the tapping tool through the hexagon socket head cap screw, and the pressing joint 9 can provide a flow passage for the tapping tool assembly.
The structure of the hole digger assembly 10 is shown in figure 2, a plurality of flow-through channels are arranged in a body 16 of the hole digger and comprise a liquid inlet hole 10-1 and a liquid return hole 10-8, hydraulic oil reaches the bottom of a jacking piston 10-4 through the liquid inlet hole 10-1, and the jacking piston 10-4 jacks under the hydraulic action to provide hole drilling pressure for a milling head 10-11. The liquid inlet hole 10-1 is provided with a throttle valve 10-2 which can adjust the thrust of the piston. The jacking piston 10-4 is connected with the connecting sleeve 10-6 through a screw 10-5, the upper end of the connecting sleeve 10-6 is connected with a spline shaft 10-12, the spline shaft 10-12 is in clearance fit with a large gear 10-13, and a rolling bearing 10-10 is arranged between the large gear 10-13 and a gland 10-9, so that the large gear 10-13 can rotate along the axis. The end of the spline shaft 10-12 is connected with the milling head 10-11, so that the jack-up piston 10-4 pushes the spline shaft 10-12 to extend out. After the hole is opened, the jacking piston 10-4 can be pushed to retract by pressing in the direction of the liquid return hole 10-8 (namely the oil sleeve annulus), and the retraction of the milling head 10-11 is realized. As shown in figure 3, a hydraulic motor 11 provides power for opening holes, hydraulic oil enters the hydraulic motor 11 through a liquid inlet hole 10-1, a flow-through pipe 15 and a three-way pipeline 17, the power of the hydraulic motor 11 is transmitted to a milling head 10-11 through a transmission shaft 16, a small gear 10-7 and a large gear 10-13 which are bevel gear pairs according to a certain rotating speed ratio, and the milling head 10-11 can realize the hole opening operation vertical to the inner wall of a sleeve 13 under stable drilling pressure and proper rotating speed.
Examples
The drilling operation is carried out on a 2000 m depth 51/2 'oil layer casing (N80, wall thickness 9.19), firstly, the ground debugging of a 51/2' drilling tool is completed, the drilling tool is put into the casing from a well head, the drilling tool is lowered to the target depth through a winch cable 1, and the depth is calibrated through logging magnetic positioning. Cable 1 be single core cable can, with the butt joint of instrument controller and cable 1, ground is passed through the controller and is sent the instruction to downhole tool, and the signal of telecommunication passes through cable 1 and transmits control unit in the instrument, starts hydraulic pump 3 and is just suppressing 10Mpa from defeated oil pipe 5, and 8 flukes of the anchor on the instrument stretch out and on the casing pipe 13 with the construction tubular column anchoring, and hydraulic drive hydraulic pressure horse 11 works simultaneously, and the trompil instrument carries out casing pipe 13 windowing. The windowing time is generally 5min, the pump pressure is reduced by 2Mpa when windowing is successful, the pressure sensor receives a feedback signal at the moment, the reverse pressure of 10Mpa is realized by changing the opening and closing state of the electromagnetic valve, the jacking piston 10-4 is pushed to retreat, the windowing milling head 10-11 is retracted into the tool, and the windowing operation of one hole is completed. And if the hole drilling operation is required to be carried out at the position 1m above the first hole, operating the winch to lift the cable 1 by a certain height and calibrating the depth, repeating the first hole construction step, lifting the cable 1 by the winch after the hole drilling is finished, and lifting out the gear type micro hole drilling tool.
The cable transmission downhole gear type perforating tool is safe, environment-friendly and efficient, is suitable for an electric gear type casing windowing tool of a production well, can realize the communication between the inside of the casing 13 and the stratum, realizes the radial horizontal perforation of the casing 13, has the diameter of a perforated hole not less than 30mm, is regular in perforated hole, has no damage to the casing 13, has no pollution to the stratum, has high construction efficiency and short period, and is suitable for the perforating operation of various steel-grade and wall-thickness casings 13; the drilling operation of the casing 13 can be realized for many times by one-time running of the tool, and a technical means is provided for the production well to penetrate the casing 13; the cable 1 is used for conveying and descending into a well, only the logging winch is matched with a minor repair operation machine, construction is simple and convenient, construction cost is low, an electric mode is adopted, operation efficiency is high, tool performance is reliable, and hole opening operation on the casing pipes 13 with various sizes and wall thicknesses can be completed; with the deep development of oil fields, the technology can be widely applied.
Claims (5)
1. A cable transmission downhole gear type tapping tool is characterized by comprising a tapper assembly arranged in a sleeve,
an anchor connected with the hole digger assembly through a pressing joint, and a hydraulic driving mechanism respectively connected with the hole digger assembly and the anchor,
the hydraulic driving mechanism comprises a driving mechanism I and a driving mechanism II, the driving mechanism I comprises a micro motor, a cable connected with the micro motor, a hydraulic pump connected with the micro motor, a hydraulic oil tank connected with the hydraulic pump, an oil delivery pipe and an oil return pipe which are arranged on the hydraulic oil tank, the oil delivery pipe is connected with the anchor,
the driving mechanism II comprises a hydraulic motor, a three-way pipeline connected with the hydraulic motor, an overflow pipe connected with the three-way pipeline, a sidewall contact device connected with the three-way pipeline, and a transmission shaft connected with the hydraulic motor, a protective pipe is arranged outside the driving mechanism II,
the hole digger assembly comprises a body, a gland arranged on the body, a jacking piston arranged on the body, a spline shaft connected with the jacking piston through a connecting sleeve, a milling head arranged at the shaft end of the spline shaft, a big gear connected with the spline shaft, a small gear meshed with the big gear, a rolling bearing arranged between the gland and the big gear and respectively connected with the gland and the big gear, the jacking piston is connected with the connecting sleeve through a screw,
the transmission shaft is connected with the pinion,
the body in be equipped with several kinds of channels that flow through, including feed liquor hole and return liquid hole, the feed liquor hole with defeated oil pipe be connected, return liquid hole with return oil pipe be connected.
2. The wireline conveyed downhole geared bore tool of claim 1, wherein the sidewall contact comprises a contact unit and a centralizer unit.
3. The tool of claim 1 wherein the anchor has a filter cartridge disposed therein, the filter cartridge comprising an inner cylinder and an outer cylinder, and a hydraulic oil filter screen disposed between the inner cylinder and the outer cylinder.
4. The cable transmission downhole geared bore hole tool of claim 1, wherein the fluid inlet port is provided with a throttle valve.
5. A cable transmissive downhole geared bore hole tool according to claim 1, wherein the gear wheel and the pinion are bevel gears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326272.3A CN110130847B (en) | 2019-04-23 | 2019-04-23 | Cable transmission downhole gear type tapping tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910326272.3A CN110130847B (en) | 2019-04-23 | 2019-04-23 | Cable transmission downhole gear type tapping tool |
Publications (2)
| Publication Number | Publication Date |
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| CN110130847A CN110130847A (en) | 2019-08-16 |
| CN110130847B true CN110130847B (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910326272.3A Active CN110130847B (en) | 2019-04-23 | 2019-04-23 | Cable transmission downhole gear type tapping tool |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114427365B (en) * | 2020-10-29 | 2024-07-19 | 中国石油化工股份有限公司 | Remote control pipe cutting device and method taking cable as transmission carrier |
| CN114922581B (en) * | 2022-05-27 | 2023-08-18 | 重庆科技学院 | Underground casing pipe continuous perforating device and working method thereof |
| CN115405265B (en) * | 2022-07-06 | 2023-07-14 | 重庆科技学院 | Electrically driven underground casing pipe continuous perforating device and working method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2344541Y (en) * | 1998-08-20 | 1999-10-20 | 马建民 | Double-pipe hydraulic power oil extraction device |
| CN101240697B (en) * | 2008-03-13 | 2010-12-01 | 上海交通大学 | Minisize down-hole lateral wall annular recess cutting implement |
| CA2746468C (en) * | 2008-12-12 | 2016-02-02 | Steinar Wasa Tverlid | Wellbore machining device |
| CN202000941U (en) * | 2011-04-20 | 2011-10-05 | 中国石油天然气股份有限公司 | Downhole casing wall tapping device for oil well |
| CN103195387B (en) * | 2013-04-16 | 2015-06-24 | 中国石油集团渤海钻探工程有限公司 | Downhole radial casing window opener |
| EP2813665A1 (en) * | 2013-06-14 | 2014-12-17 | Welltec A/S | Downhole machining system and method |
| CN104695886A (en) * | 2015-01-26 | 2015-06-10 | 中国石油集团渤海钻探工程有限公司 | Zero-radius down-hole casing drilling device and drilling method thereof |
| CN108915590B (en) * | 2018-06-15 | 2019-11-15 | 中国石油集团长城钻探工程有限公司 | The automatically controlled drilling equipment of deep penetration |
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Effective date of registration: 20201020 Address after: No. 6, liupukang, Xicheng District, Beijing 100120 Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Applicant before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |
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