CN102787804A - Device and method for drilling by using full-automatic composite material continuous pipe - Google Patents
Device and method for drilling by using full-automatic composite material continuous pipe Download PDFInfo
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- CN102787804A CN102787804A CN2011101272103A CN201110127210A CN102787804A CN 102787804 A CN102787804 A CN 102787804A CN 2011101272103 A CN2011101272103 A CN 2011101272103A CN 201110127210 A CN201110127210 A CN 201110127210A CN 102787804 A CN102787804 A CN 102787804A
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Abstract
The invention discloses a device and a method for drilling by using a full-automatic composite material continuous pipe and relates to the technical field of drilling in the oil and gas industry. The upper end of a drill is connected with an electric motor driving the drill to rotate, a composite material continuous pipe with an embedded cable is wound on a continuous pipe roller and provided with a mud flow channel, and the lower end of the composite material continuous pipe is connected with a continuous pipe connector. The continuous pipe connector, a measuring mechanism and a steering tool are connected with the electric motor sequentially. A ground power supply is connected with the measuring mechanism, the steering tool and the electric motor through the cable embedded in the composite material continuous pipe. The device and the method achieve transmission of electric power to the underground through the composite material continuous pipe, bi-direction real-time communication between the underground and the ground and drilling through the electric motor. The device and the method can be applied to the fields of underbalanced drilling, deepwater drilling, directional drilling, re-drilling of an old well and drilling of a well containing high sulfur content.
Description
Technical field
The present invention relates to oil and gas industry drilling technology field, especially a kind of all-electric composite continuous pipe bit well device and method.
Background technology
In continuous pipe bit well, carbon steel pipe continuously has higher H 2 S stress corrosion crack sensitivity, uncomfortable bench drill sulfide hydrogen stratum to the sour environment bad adaptability.Metal material is managed the wire transmission that is difficult to realize electric power and signal continuously.Existing down-hole is with boring the technological transfer rate of the middle mud-pulse of radio data transmission method (MWD), electromagnetic wave remote measurement and drilling rod sonic transmissions far below wire transmission speed.
In the directed drilling operation, be Controlling Borehole Trajectory, need frequently make a trip, to change the angle of bend of BHA (BHA) and adjustment down-hole motor, cause continuously pipe generation fatigue failure too early, shortened continuous pipe application life.
The screw rod of the routine of extensive use and turbine motor utilize mud pressure as power in the directed drilling, can produce remarkable pressure drop, influence efficiency of breaking rock.Screw motor is to control rotating speed indirectly through the variation of slurry fluid, must limit mud speed rate and circulating pressure, and the stall phenomenon is difficult to avoid.Self produce dither during screw motor work, can't realize counter-rotating, screw motor receives the mud type restriction big in addition, is not suitable for the high compression ratio drilling fluid.
Summary of the invention
An object of the present invention is to provide a kind of all-electric composite continuous pipe bit well device.
Another object of the present invention provides a kind of all-electric composite continuous pipe bit well method.
The deficiency that drilling rig provided by the invention and the boring method that utilizes this drilling rig have overcome prior art realizes that the composite continuous pipe is to downhole transmitted electric power, down-hole and ground bidirectional real-time communication, electro-motor drilling well and control drill bit guiding.The present invention can be widely used under balance pressure drilling, deepwater drilling, directed drilling, old well heavily bores and field such as high sour well drilling well.
In order to solve above technical problem; The present invention realizes through adopting following technical scheme mode: a kind of all-electric composite continuous pipe bit well device; Drill bit upper end connects and drives the electro-motor that drill bit rotates, comprise the composite continuous pipe of embedded cable, continuously manage cylinder, ground power supply, continuously union, measure downhole parameters measuring mechanism, change the steering tool of bit heading.The composite continuous pipe is provided with the mud runner.The composite continuous pipe is wound on the continuous pipe cylinder, and the lower end of composite continuous pipe connects continuous union.Union, measuring mechanism, steering tool are connected in series with electro-motor successively continuously.Ground power supply is connected with measuring mechanism, steering tool and electro-motor through the embedded cable of composite continuous pipe.
Be serially connected with mud pressure sensor, azimuth sensor, deviation sensor, three axis accelerometer, bit weight sensor, torque sensor, drilling fluid density sensor, bottom hole temperature (BHT) sensor, hole diameter sensor, formation resistivity measuring instrument, neutron porosity measuring instrument and natural gamma parameter measurement instrument through lead in the measuring mechanism of the present invention.
The present invention also is being connected with the automatically controlled propeller that the driving drill bit moves along well continuously between union and the measuring mechanism.Also be connected with the automatically controlled disconnected device that takes off continuously between union and the automatically controlled propeller.Between ground power supply and composite continuous pipe, also be connected with the ground electrical power transformer, between composite continuous pipe and measuring mechanism, also be connected with the down-hole power transformer.
The present invention also comprises ground monitoring device, ground communications processor and downhole communication processor.On ground, the ground monitoring device is connected through lead with the ground communications processor.In the down-hole, downhole communication processor and measuring mechanism, steering tool, automatically controlled propeller, automatically controlledly disconnectedly take off device and electro-motor is connected through lead.The ground communications processor is connected with the downhole communication processor through the embedded cable of composite continuous pipe.
The present invention also is provided with the unidirectional one way valve that passes through of control mud between steering tool and electro-motor.Ground also is provided with slush pump, and the outlet opening of slush pump is connected with the upper end of composite continuous pipe.The well head place also is provided with the injection head of clamping composite continuous pipe on ground.
During practice of construction, injection head clamping and lift the composite continuous pipe is transferred to the down-hole with drill bit.Mud is discharged by slush pump, is delivered to downhole drill bit through the mud runner of composite continuous pipe, and by the bit nozzle ejection, the landwaste tubing string is also taken along returning to ground on the annular space of tubing string and the borehole wall in the bottom-hole cleaning, and one way valve is controlled the mud one-way flow.In the down-hole, the electrical motor driven drill bit rotates, and automatically controlled impeller driven drill bit moves along well, and the gravity of automatically controlled propeller or down-hole string applies the pressure of the drill to drill bit.Measuring mechanism image data, downhole communication processor are that communication signal is uploaded in real time with the survey data code conversion.The downhole communication processor receives the control instruction that underground passes simultaneously, and according to control instruction, electro-motor changes drill speed; Steering tool changes drill bit advancing direction; Automatically controlled propeller changes the pressure of the drill, automatically controlledly disconnectedly takes off device and breaks off according to control instruction, to separate composite continuous pipe and drill bit.On ground, the ground communications processor receives the communication signal and the decoding of uploading, and the ground monitoring device shows survey data, according to survey data, and transmission control system instruction under the ground communications processor.Carry out two-way real-time communication through the embedded cable of composite continuous pipe between down-hole and the ground, cable while transferring electric power and communication signal that the composite continuous pipe is embedded.To delivered downhole, electric power flows to measuring mechanism, steering tool, automatically controlled propeller, automatically controlled disconnected take off device and electro-motor to the electric power of ground power supply again after down-hole power transformer transformation after ground electrical power transformer transformation.
Utilize a kind of all-electric composite continuous pipe bit well method of this drilling rig to be:
(1) utilize the composite continuous pipe to be lowered to drill bit;
(2) utilize the electrical motor driven drill bit to rotate, utilize automatically controlled propeller to apply the pressure of the drill to drill bit;
(3) in the down-hole, utilize the measuring mechanism image data, survey data is uploaded to ground in real time; Receive the control instruction that underground passes, utilize electro-motor to change drill speed, utilize steering tool to change drill bit advancing direction, utilize automatically controlled propeller to change the pressure of the drill, utilize and automatically controlledly disconnectedly take off device and separate compound continuous pipe and drill bit;
(4) on ground, receive the survey data of uploading, and to electro-motor, steering tool, automatically controlled propeller and the automatically controlled disconnected transmission control system instruction under the device of taking off;
Utilize the embedded cable of composite continuous pipe to be the delivered downhole ground electrical power.
Carry out two-way real-time communication through the embedded cable of composite continuous pipe between down-hole and the ground.The transmission of electric power and communication signal is carried out simultaneously between down-hole and the ground.To delivered downhole, electric power carries out transformation after being transported to the down-hole to the electric power of ground power supply again after transformation.
Compared with prior art, the invention has the beneficial effects as follows: the present invention has adopted the composite continuous pipe to replace metal material to manage continuously, transmits pulling force, moment of torsion and the mud runner is provided.With carbon steel continuously pipe compare, composite continuous pipe weight is lighter, has good fatigue behaviour and corrosion stability, but self-lubricating, abrasion resistance, pliability are good, use more economical.Manage continuously than carbon steel and titanium alloy, the composite continuous pipe is stronger to hydrogen sulfide containing sour environment adaptive capacity.
The present invention embeds cable in compound continuous pipe; When electro-motor, measuring apparatus and steering tool transmit electric power; Can also real-time wired both-way communication passage be provided for down-hole and ground; Down-hole and ground transmit and receive data simultaneously, and the wire transmission speed of communication signal reaches 200Kb/s.
Electro-motor has increased the controllability and the flexibility of BHA (BHA), has reduced the number of times that makes a trip that causes because of the adjustment BHA, and rotating speed is not influenced by drilling fluid.The counter-rotating of realization drill bit, drill bit more is prone to trip out.Know the underground survey data in real time through the ground monitoring device,, better formulate decision-making, also help to realize geosteering and formation evaluation the continuous feedback of borehole status, moment of torsion, the pressure of the drill and variation of lithological.Through instructing wire transmission, in time change drilling parameter, control electro-motor and steering tool, change bit heading, in time change well track, when guaranteeing that well keeps level and smooth and improves wellbore quality, brill reaches target zone as early as possible.Compare with screw motor; Electro-motor is avoided stall through setting current valve limit and the pressure of the drill valve limit; Intrinsic low frequency vibration characteristic promotes that further well is level and smooth, and electro-motor be applicable to the inflation and the high compression ratio drilling fluid, implement overall process under-balance drilling technology and deepwater drilling easily.
Description of drawings
Fig. 1 is the structural representation of drilling rig of the present invention and method.
Fig. 2 is the BHA structural representation of drilling rig of the present invention and method.
Mark among the figure:
1, injection head, 2, the composite continuous pipe, 3, drill bit, 4, the ground monitoring device, 5, ground power supply; 6, ground communications processor, 7, the ground electrical power transformer, 8, manage cylinder continuously, 9, slush pump, 10, union continuously; 11, down-hole power transformer, 12, the downhole communication processor, 13, the automatically controlled disconnected device that takes off, 14, automatically controlled propeller; 15, measuring mechanism, 16, steering tool, 17, one way valve, 18, electro-motor.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed description.
With reference to Figure of description 1 and accompanying drawing 2; The invention discloses a kind of all-electric composite continuous pipe bit well device; Drill bit 3 upper ends connect to drive the electro-motor 18 that drill bit 3 rotates, the present invention includes the composite continuous pipe 2 of embedded cable, continuously manage cylinder 8, continuously union 10, measure downhole parameters measuring mechanism 15, change the steering tool 16 of bit heading.Composite continuous pipe 2 is provided with the mud runner, and the mud runner communicates with the nozzle of drill bit 3.Composite continuous pipe 2 is wound on the continuous pipe cylinder 8, and the lower end of composite continuous pipe 2 connects continuous union 10.Union 10, measuring mechanism 15, steering tool 16 are connected in series with electro-motor 18 successively continuously.Vertically be provided with cable passage in the union 10 continuously, composite continuous pipe 2 embedded cables pass the cable passage of continuous union 10.Ground power supply 5 is connected with measuring mechanism 15, steering tool 16 and electro-motor 18 through composite continuous pipe 2 embedded cables.
Be serially connected with mud pressure sensor, azimuth sensor, deviation sensor, three axis accelerometer, bit weight sensor, torque sensor, drilling fluid density sensor, bottom hole temperature (BHT) sensor, hole diameter sensor, formation resistivity measuring instrument, neutron porosity measuring instrument and natural gamma parameter measurement instrument through lead in the measuring mechanism 15.
Continuously be connected with automatically controlled propeller 14 between union 10 and the measuring mechanism 15, automatically controlled propeller 14 applies the pressure of the drill and promotion drill bit 3 for drill bit 3 and moves along well, and automatically controlled propeller 14 is connected with ground power supply 5 through composite continuous pipe 2 embedded cables.Between continuous union 10 and automatically controlled propeller 14, be provided with the automatically controlled disconnected device 13 that takes off, automatically controlled disconnected take off device logical 13 composite continuous pipe 2 embedded cables be connected with ground power supply 5.Between ground power supply 5 and composite continuous pipe 2, also be connected with ground electrical power transformer 7, between composite continuous pipe 2 and measuring mechanism 15, also be connected with down-hole power transformer 11 through cable through cable.On ground, ground monitoring device 4 and ground communications processor 6 are connected through lead.In the down-hole, downhole communication processor 12 and measuring mechanism 15, steering tool 16, automatically controlled disconnected device 13 and the electro-motor 18 of taking off are connected through lead.Ground communications processor 6 is connected with downhole communication processor 12 through composite continuous pipe 2 embedded cables.Between steering tool 16 and electro-motor 18, also be provided with the unidirectional one way valve that passes through 17 of control mud.Ground is provided with slush pump 9, and the outlet opening of slush pump 9 is connected with the upper end mud runner of composite continuous pipe 2.The well head place is provided with the injection head 1 of clamping composite continuous pipe 2 on ground.
During practice of construction, injection head 1 clamping and lift composite continuous pipe 2 is transferred to the down-hole with drill bit 3.Mud is discharged the mud runner that the back gets into composite continuous pipe 2 by slush pump 9, and then by the ejection of drill bit 3 nozzles, landwaste is also taken along returning to ground one way valve 17 control mud one-way flow on the annular space of the tubing string and the borehole wall in the bottom-hole cleaning.In the down-hole, electro-motor 18 drives drill bits 3 and rotates, and automatically controlled propeller 14 drives drill bit 3 and moves along well, and automatically controlled propeller 14 applies the pressure of the drill for drill bit 3, perhaps applies the pressure of the drill for drill bit 3 by the gravity of down-hole string.Measuring mechanism 15 image data, downhole communication processor 12 are that communication signal is uploaded in real time with the survey data code conversion.Downhole communication processor 12 receives the control instruction that underground passes simultaneously; According to control instruction; Electro-motor 18 changes drill bit 3 rotating speeds, and steering tool 16 changes drill bit 3 directions of advance, and automatically controlled propeller 14 changes the pressure of the drill; The automatically controlled disconnected device 13 that takes off breaks off according to control instruction, separates composite continuous pipe 2 and drill bit 3.On ground, ground communications processor 6 receives the communication signal and the decoding of uploading, and ground monitoring device 4 shows survey data, according to survey data, and 6 times transmission control system instructions of ground communications processor.Carry out two-way real-time communication through composite continuous pipe 2 embedded cables between down-hole and the ground, the transmission of electric power and communication signal is carried out simultaneously between down-hole and the ground.The electric power of ground power supply 5 after ground electrical power transformer 7 transformations through the embedded cable of composite continuous pipe 2 to delivered downhole, electric power flows to measuring mechanism 15, steering tool 16, automatically controlled propeller 14, automatically controlled disconnected take off device 13 and electro-motor 18 again after down-hole power transformer 11 transformations.
The invention discloses a kind of all-electric composite continuous pipe bit well method:
The first step utilizes composite continuous pipe 2 to be lowered to comprise the BHA of drill bit 3, electro-motor 18, steering tool 16, measuring mechanism 15 and automatically controlled propeller 14.
Second step, utilize electro-motor 18 to drive drill bit 3 and rotate, utilize automatically controlled propeller 14 to apply the pressure of the drill to drill bit 3;
The 3rd step, in the down-hole, utilize measuring mechanism 15 image data, survey data is uploaded to ground in real time; Receive the control instruction that underground passes, utilize electro-motor 18 to change drill bit 3 rotating speeds, utilize steering tool 16 to change drill bit 3 directions of advance, utilize automatically controlled propeller 14 to change the pressure of the drill; When drill bit is met card, utilize the automatically controlled disconnected device 13 that takes off to separate composite continuous pipe 2 and drill bit 3, realize tripping out of composite continuous pipe 2.
The 4th step; On ground, receive the survey data of uploading, according to survey data adjustment mud density, viscosity and ph value; Outlet pump pressure through regulating slush pump 9 is adjusted bottom pressure, and to electro-motor 18, steering tool 16, automatically controlled propeller 14 and the automatically controlled disconnected 13 times transmission control system instructions of device of taking off.
Utilize the electric power of the embedded cable of composite continuous pipe 2 for delivered downhole ground power supply 5.
Carry out two-way real-time communication through composite continuous pipe 2 embedded cables between down-hole and the ground.The transmission of electric power and communication signal is carried out simultaneously between down-hole and the ground.
The electric power of ground power supply 5 to delivered downhole, flows to measuring mechanism 15, steering tool 16, automatically controlled propeller 14, automatically controlled disconnected take off device 13 and electro-motor 18 in down-hole power again after down-hole power transformer 11 transformations after ground electrical power transformer 7 transformations.
Claims (12)
1. all-electric composite continuous pipe bit well device; Comprise drill bit (3) and drive the electro-motor (18) that drill bit (3) rotates, it is characterized in that: also comprise the composite continuous pipe (2) of embedded cable, continuously manage cylinder (8), ground power supply (5), continuously union (10), measure downhole parameters measuring mechanism (15), change the steering tool (16) of bit heading; In the composite continuous pipe (2) is the mud runner; Composite continuous pipe (2) is wound on the continuous pipe cylinder (8), and the lower end of composite continuous pipe (2) connects continuous union (10); Union (10), measuring mechanism (15), steering tool (16) are connected in series with electro-motor (18) successively continuously; Ground power supply (5) is connected with measuring mechanism (15), steering tool (16) and electro-motor (18) through the embedded cable of composite continuous pipe (2).
2. all-electric composite continuous pipe bit well device according to claim 1 is characterized in that: be serially connected with mud pressure sensor, azimuth sensor, deviation sensor, three axis accelerometer, bit weight sensor, torque sensor, drilling fluid density sensor, bottom hole temperature (BHT) sensor, hole diameter sensor, formation resistivity measuring instrument, neutron porosity measuring instrument and natural gamma parameter measurement instrument through lead in the said measuring mechanism (15).
3. all-electric composite continuous pipe bit well device according to claim 2 is characterized in that: between said continuous union (10) and measuring mechanism (15), also be connected with and drive the automatically controlled propeller (14) that drill bit (3) moves along well.
4. all-electric composite continuous pipe bit well device according to claim 3 is characterized in that: between said continuous union (10) and automatically controlled propeller (14), also be connected with the automatically controlled disconnected device (13) that takes off.
5. all-electric composite continuous pipe bit well device according to claim 4 is characterized in that: between said ground power supply (5) and composite continuous pipe (2), also be connected with ground electrical power transformer (7); Between said composite continuous pipe (2) and measuring mechanism (15), also be connected with down-hole power transformer (11).
6. according to claim 4 or 5 described all-electric composite continuous pipe bit well devices, it is characterized in that: also comprise ground monitoring device (4), ground communications processor (6) and downhole communication processor (12); On ground, ground monitoring device (4) is connected through lead with ground communications processor (6); In the down-hole, downhole communication processor (12) and measuring mechanism (15), steering tool (16), automatically controlled propeller (14), automatically controlledly disconnectedly take off device (13) and electro-motor (18) is connected through lead; Ground communications processor (6) is connected with downhole communication processor (12) through the embedded cable of composite continuous pipe (2).
7. all-electric composite continuous pipe bit well device according to claim 6 is characterized in that: between said steering tool (16) and electro-motor (18), also be provided with the control unidirectional one way valve that passes through of mud (17).
8. all-electric composite continuous pipe bit well device according to claim 6 is characterized in that: also comprise slush pump (9), the outlet opening of slush pump (9) is connected with the upper end of said composite continuous pipe (2).
9. all-electric composite continuous pipe bit well device according to claim 6, it is characterized in that: the well head place also is provided with the injection head (1) of clamping composite continuous pipe (2) on ground.
10. all-electric composite continuous pipe bit well method is characterized in that:
The first step utilizes composite continuous pipe (2) to be lowered to drill bit (3);
Second step, utilize electro-motor (18) to drive drill bit (3) and rotate, utilize automatically controlled propeller (14) to apply the pressure of the drill to drill bit (3);
The 3rd step, in the down-hole, utilize measuring mechanism (15) image data, survey data is uploaded to ground in real time; Receive the control instruction that underground passes; Utilize electro-motor (18) to change drill bit (3) rotating speed; Utilize steering tool (16) to change drill bit (3) direction of advance, utilize automatically controlled propeller (14) to change the pressure of the drill, utilize the automatically controlled disconnected device (13) that takes off to separate composite continuous pipe (2) and drill bit (3);
The 4th step on ground, received the survey data of uploading, and to electro-motor (18), steering tool (16), automatically controlled propeller (14) and the automatically controlled disconnected transmission control system instruction under the device (13) of taking off;
Utilizing the embedded cable of composite continuous pipe (2) is the delivered downhole ground electrical power.
11. all-electric composite continuous pipe bit well method according to claim 10 is characterized in that: carry out two-way real-time communication through the embedded cable of composite continuous pipe (2) between down-hole and the ground; The transmission of electric power and communication signal is carried out simultaneously between down-hole and the ground.
12., it is characterized in that according to claim 10 or 11 described all-electric composite continuous pipe bit well methods: ground electrical power after transformation to delivered downhole; Electric power carries out transformation after being transported to the down-hole again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101272103A CN102787804A (en) | 2011-05-17 | 2011-05-17 | Device and method for drilling by using full-automatic composite material continuous pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101272103A CN102787804A (en) | 2011-05-17 | 2011-05-17 | Device and method for drilling by using full-automatic composite material continuous pipe |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422004A (en) * | 2015-11-25 | 2016-03-23 | 中国石油集团钻井工程技术研究院 | Continuous tube electric control directional device based on hollow brushless motor |
| CN107288545A (en) * | 2016-04-01 | 2017-10-24 | 中国石油化工股份有限公司 | A kind of boring method |
| CN107366509A (en) * | 2017-06-23 | 2017-11-21 | 西安石油大学 | Self-powered based on gas underbalance well drilling can deflecting bit |
| CN108643883A (en) * | 2018-03-30 | 2018-10-12 | 中国石油集团长城钻探工程有限公司 | A kind of continuous pipe drilling tool power supply and communication system |
| CN109138836A (en) * | 2017-06-19 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of intelligent drilling system and method |
| CN109854166A (en) * | 2019-03-06 | 2019-06-07 | 长江大学 | A kind of double buffering bit pressure automatic control tool for motor-driven drilling |
| CN111441720A (en) * | 2020-05-16 | 2020-07-24 | 杰瑞能源服务有限公司 | Coiled tubing electric drilling device |
| CN112228045A (en) * | 2020-11-18 | 2021-01-15 | 中国石油天然气集团有限公司 | Drilling hole diameter measuring system suitable for working conditions while drilling |
| SE1951523A1 (en) * | 2019-12-20 | 2021-06-21 | Epiroc Rock Drills Ab | A method performed by a control device for changing a drill bit in a rock drilling unit, a control device of a rockdrilling unit, a rock drilling unit and a rock drilling rig |
| CN114075926A (en) * | 2020-08-03 | 2022-02-22 | 万晓跃 | Short-radius directional drilling tool and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108643883A (en) * | 2018-03-30 | 2018-10-12 | 中国石油集团长城钻探工程有限公司 | A kind of continuous pipe drilling tool power supply and communication system |
| CN109854166A (en) * | 2019-03-06 | 2019-06-07 | 长江大学 | A kind of double buffering bit pressure automatic control tool for motor-driven drilling |
| CN109854166B (en) * | 2019-03-06 | 2020-04-28 | 长江大学 | Double-buffering drilling pressure automatic control tool for electric drilling |
| SE1951523A1 (en) * | 2019-12-20 | 2021-06-21 | Epiroc Rock Drills Ab | A method performed by a control device for changing a drill bit in a rock drilling unit, a control device of a rockdrilling unit, a rock drilling unit and a rock drilling rig |
| SE543995C2 (en) * | 2019-12-20 | 2021-10-19 | Epiroc Rock Drills Ab | A method performed by a control device for changing a drill bit in a rock drilling unit, a control device of a rockdrilling unit, a rock drilling unit and a rock drilling rig |
| CN111441720A (en) * | 2020-05-16 | 2020-07-24 | 杰瑞能源服务有限公司 | Coiled tubing electric drilling device |
| CN114075926A (en) * | 2020-08-03 | 2022-02-22 | 万晓跃 | Short-radius directional drilling tool and method |
| CN112228045A (en) * | 2020-11-18 | 2021-01-15 | 中国石油天然气集团有限公司 | Drilling hole diameter measuring system suitable for working conditions while drilling |
| CN112228045B (en) * | 2020-11-18 | 2021-10-22 | 中国石油天然气集团有限公司 | Drilling hole diameter measuring system suitable for working conditions while drilling |
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Application publication date: 20121121 |