CN106050154B - Anti- viscous motion instrument based on flexible link - Google Patents
Anti- viscous motion instrument based on flexible link Download PDFInfo
- Publication number
- CN106050154B CN106050154B CN201610385147.6A CN201610385147A CN106050154B CN 106050154 B CN106050154 B CN 106050154B CN 201610385147 A CN201610385147 A CN 201610385147A CN 106050154 B CN106050154 B CN 106050154B
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- China
- Prior art keywords
- central tube
- ring
- lost
- connection
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
Abstract
The invention discloses for the anti-viscous motion instrument based on flexible link in oil ultradeep well drilling field, solve the problems, such as that occurring card cunning in drilling process causes efficiency of breaking rock to reduce.Its main technical schemes is：Vibration damping assembly, upper body, central enclosure, lower case pass sequentially through screw thread and are connected；Combination disk spring lower end promotes anti-lost pipe to stretch central tube, and anti-lost pipe passes through central enclosure top connection shaft shoulder axially position；Flexible lever system is left-handed, and its upper and lower side is separately fixed in the circular groove of central enclosure lower end and central tube boss upper end, and flexible link upper and lower side tilts 30 ~ 40 degree of installations, and is initially extended state；The pressure of the drill is transmitted by combination disk spring respectively during work and flexible lever system transmits torque to central tube；When central tube inverts, flexible lever system shrinks, and makes central tube compression combination disk spring axial shrinkage to reduce drill bit depth of cut, and drill bit is always in rock stratum in whole process.
Description
Technical field
The present invention relates to for the anti-viscous motion based on flexible link in oil, natural gas ultradeep well and extended reach well drilling field
Instrument.
Background technology
Recent years, with the continuous development of China's industry, oil, the demand of natural gas and yield are also increasing.
However, this situation causes the exhaustion of a large amount of Shallow Oil-Gas resources.In order to alleviate the shortage problem of China's oil resource, Ren Menkai
Begin to carry out oil exploitation to the severe field of the environmental conditions such as deep-well, ultradeep well.But shown according to exploitation field condition：Boring
During visiting ultradeep well, extended reach well, horizontal well, PDC drill bit is in drilling process, when especially running into soft or hard staggeredly stratum,
Easily there is the sliding phenomenon of card, cause drill bit and the frequent of drilling tool to suppress jump and torsional oscillation, cause drill bit to collapse tooth, damage, down-hole equipment
The damage of combination, reduce drill bit rate of penetration and efficiency of breaking rock, drilling cost increase.It is big at present in order to tackle this phenomenon
Part field solves bit freezing, bit bouncing phenomenon by the way of pulling out of hole, due to being incited somebody to action with the increase for the number that makes a trip, drilling efficiency
It can substantially reduce.
Based on this, in order to prevent drill bit from bit freezing, stick-slip and phenomenon of torsional vibration occur, the number that makes a trip is reduced, improves drilling well effect
Rate, set forth herein the anti-viscous motion instrument based on flexible link.
The content of the invention
The purpose of the present invention is：In order to solve the bit freezing, stick-slip, the brill that occur during ultradeep well and extended reach well is bored
Head and drilling tool frequently suppress jump, phenomenon of torsional vibration, improve efficiency of breaking rock, reduce the number to make a trip, extend bit life, spy provides base
In the anti-viscous motion instrument of flexible link.
In order to achieve the above object, the technical solution adopted by the present invention is：Anti- viscous motion instrument based on flexible link, mainly
By vibration damping assembly, adjusting washer, upper body, combination disk spring, anti-lost pipe, floating seal ring, dynamic seal ring, central enclosure, in
Heart pipe, lower case, flexible link, expansion bolt, self-aligning bearing combination, O-ring seal b, lock-on connection, rectangular seal f groups
Into；Characterized in that, vibration damping assembly connects including top connection, rectangular seal a, rectangular seal b, rectangular seal c, locking
Head, O-ring seal a, top absorbing ring, top retaining ring, anti-lost central tube, packing ring, middle part absorbing ring, spline joint, bottom
Retaining ring, bottom absorbing ring, rectangular seal d, sealing ring, rectangular seal e, center contact, by rectangular seal a and rectangle
Sealing ring b is separately mounted in top connection, and top absorbing ring is installed in top connection, by rectangular seal c, O-ring seals a with
Top retaining ring, which is arranged on lock-on connection, makes four to be combined as an entirety, and is connected by lock-on connection and spline joint screw thread
Connect and be fixed；The internal spline of the spline sections of top connection lower end and spline joint, which coordinates, transmits moment of torsion, top connection lower end according to
Secondary mounting gasket and middle part absorbing ring；Anti-lost central tube is fitted into top connection endoporus, by the shaft shoulder inside top connection to anti-lost
Central tube progress axially moves down spacing；Bottom retaining ring and bottom absorbing ring are installed successively in anti-lost central tube lower end, rectangle is close
After seal d and rectangular seal e is installed on sealing ring, then it is co-mounted between anti-lost central tube lower end and center contact；
Spline joint is threadedly coupled with center contact, and anti-lost central tube lower end is threadedly coupled with center contact, is fixed and is prevented that vibration damping is total
Fall under into part；In vibration damping assembly lower end, between center contact, upper body, central enclosure, lower case, lock-on connection according to
It is secondary to be connected through a screw thread；Combination disk spring, combination disk spring upper end and center contact are installed between center contact and upper body
Adjusting washer is installed between lower end boss, and axial limiting is carried out to combination disk spring upper end by center contact lower end boss；
Anti-lost pipe is installed between center contact lower end and upper body lower end inner wall, anti-lost pipe upper end under combination disk spring with terminating
Touch, and axial limiting is carried out to combination disk spring lower end；Floating is installed between anti-lost pipe outer wall and upper body lower end inner wall
Sealing ring seals to the lubricating oil in combination disk spring；It is provided between center contact lower end outer wall and anti-lost inside pipe wall dynamic
Sealing ring；Anti-lost pipe lower end is connected with central tube by screw thread, and carries out axle to anti-lost pipe by the central enclosure upper end joint shaft shoulder
It is spacing to moving down；End connector is circumferentially uniformly provided with circular groove under central enclosure, and each flexible link upper end passes through swollen in flexible lever system
Swollen bolt is respectively and fixedly installed in equally distributed each circular groove, and is integrally formed with central enclosure；In central tube lower end boss
Upper end is circumferentially uniformly provided with the circular groove corresponding with end connector circumference circular groove under central enclosure, in flexible lever system under each flexible link
End is respectively and fixedly installed in the circumferentially uniform circular groove in central tube boss upper end by expansion bolt, and forms one with central tube
Body；In flexible lever system installation, flexible lever system top and bottom are made to keep 30~40 degree of angle of inclination installation, while middle part
Certain relative distance is kept between end connector and central tube boss upper end under housing, flexible lever system is in the shape of stretching
State；Self-aligning bearing is installed between central tube boss lower end and lower case to combine, self-aligning bearing combination upper and lower side leads to respectively
Cross lower case lower end inner wall boss and lock-on connection upper end is positioned；It is threadedly coupled in lock-on connection and lower case lower end
Place's installation and O-ring seal b, rectangular seal is provided between lock-on connection inwall and central tube lower end outer wall.
The beneficial effects of the invention are as follows：(1) instrument promotes central tube to stretch by the release of upper unit combination disk spring energy
Exhibition the stretching, extension and contraction of lower device flexible link system control facilities, is turned round to its total length when shaft bottom drill bit reaction torque exceedes to set
During square, combination disk spring and flexible lever system can automatically shrink, and in contraction process, drill string shortens, and drill bit is gradually subsequently lifted shaft bottom
To full-speed state is returned to, with the reduction of moment of torsion on drilling tool, combination disk spring, which releases energy, is applied to central tube, and passes through flexibility
Lever system stretches drilling tool, and drill bit is remained in rock stratum and stably crept into；(2) axial shrinkage and flexible link of combination disk spring
The circumferential distortional energy of system mitigates drill string axial vibration and twisting vibration, extends drilling tool and bit life；(3) instrument is automatic
Shrink and stretching, extension is effectively prevented from the appearance of drill bit bit freezing phenomenon, reduces drilling tool stick-slip, reduce the number to make a trip, shorten
Drilling time, improve drilling efficiency；(4) absorbed using multistage absorbing ring and axially and radially vibrated caused by drilling tool work,
Ensure that the normal work of top drilling tool is unaffected.
Brief description of the drawings
Fig. 1 is the structural representation of the anti-viscous motion instrument of the invention based on flexible link.
In figure：1. top connection, 2. rectangular seal a, 3. rectangular seal b, 4. rectangular seal c, 5. lock-on connections,
6.O type sealing rings a, 7. top absorbing rings, 8. top retaining rings, 9. anti-lost central tubes, 10. packing rings, 11. middle part absorbing rings, 12.
Spline joint, 13. bottom retaining rings, 14. bottom absorbing rings, 15. rectangular seal d, 16. sealing rings, 17. rectangular seal e,
18. center contact, 19. adjusting washers, 20. upper bodies, 21. combination disk springs, 22. anti-lost pipes, 23. floating seal rings, 24. are moved
Sealing ring, 25. central enclosures, 26. central tubes, 27. lower cases, 28. flexible links, 29. expansion bolts, 30. self-aligning bearing groups
Conjunction, 31.O type sealing rings b, 32. lock-on connections, 33. rectangular seal f.
Fig. 2 is the front view of flexible lever system in Fig. 1 of the present invention.
In figure：25. central enclosure, 26. central tubes, 28. flexible links, 29. expansion bolts.
Embodiment
It is shown with reference to the accompanying drawings, the anti-viscous motion instrument based on flexible link, mainly by vibration damping assembly, adjusting washer 19, top
Housing 20, combination disk spring 21, anti-lost pipe 22, floating seal ring 23, dynamic seal ring 24, central enclosure 25, central tube 26, lower case
Body 27, flexible link 28, expansion bolt 29, self-aligning bearing combination 30, O-ring seal b31, lock-on connection 32, rectangular seal f33
Composition；Characterized in that, vibration damping assembly includes top connection 1, rectangular seal a2, rectangular seal b3, rectangular seal c4, lock
Tight coupling 5, O-ring seal a6, top absorbing ring 7, top retaining ring 8, anti-lost central tube 9, packing ring 10, middle part absorbing ring 11,
Spline joint 12, bottom retaining ring 13, bottom absorbing ring 14, rectangular seal d15, sealing ring 16, rectangular seal e17, in
Portion's joint 18, rectangular seal a2 and rectangular seal b3 are separately mounted in top connection 1, top absorbing ring 7 is installed to
On joint 1, rectangular seal c4, O-ring seals a6 and top retaining ring 8, which are arranged on lock-on connection 5, makes four to be combined as
One entirety, and be threadedly coupled and be fixed with spline joint 12 by lock-on connection 5；The spline sections of the lower end of top connection 1
Coordinate with the internal spline of spline joint 12 and transmit moment of torsion, the lower end of top connection 1 mounting gasket 10 and middle part absorbing ring 11 successively；Will be anti-
Fall central tube 9 to be fitted into the endoporus of top connection 1, anti-lost central tube 9 is carried out by the inside shaft shoulder of top connection 1 axially move down it is spacing；
Bottom retaining ring 13 and bottom absorbing ring 14, rectangular seal d15 and rectangular seal are installed successively in the anti-lost lower end of central tube 9
After e17 is installed on sealing ring 16, then it is co-mounted between the anti-lost lower end of central tube 9 and center contact 18；Spline joint 12
It is threadedly coupled with center contact 18, the anti-lost lower end of central tube 9 is threadedly coupled with center contact 18, is fixed and is prevented vibration damping assembly portion
Fall under point；In vibration damping assembly lower end, center contact 18, upper body 20, central enclosure 25, lower case 27, lock-on connection 32
Between pass sequentially through threaded connection；Combination disk spring 21, combination disk spring 21 are installed between center contact 18 and upper body 20
Adjusting washer 19 is installed between upper end and the lower end boss of center contact 18, and by the lower end boss of center contact 18 to combining dish
The upper end of spring 21 carries out axial limiting；Anti-lost pipe 22 is installed between the lower end of center contact 18 and the lower end inner wall of upper body 20,
The anti-lost upper end of pipe 22 and 21 times end in contact of combination disk spring, and axial limiting is carried out to the lower end of combination disk spring 21；Outside anti-lost pipe 22
Floating seal ring 23 is installed between wall and the lower end inner wall of upper body 20 to seal the lubricating oil in combination disk spring 21；
Dynamic seal ring 24 is installed between the lower end outer wall of center contact 18 and the inwall of anti-lost pipe 22；The anti-lost lower end of pipe 22 is logical with central tube 26
Cross screw thread to be connected, and by the upper end joint shaft shoulder of central enclosure 25 anti-lost pipe 22 is carried out axially moving down spacing；In central enclosure 25
Lower end connector is circumferentially uniformly provided with circular groove, and each upper end of flexible link 28 is fixedly mounted respectively by expansion bolt 29 in flexible lever system
It is integrally formed in equally distributed each circular groove, and with central enclosure 25；Circumferentially uniformly opened in the lower end boss upper end of central tube 26
There is a circular groove corresponding with 25 times end connector circumference circular grooves of central enclosure, each lower end of flexible link 28 passes through expansion in flexible lever system
Bolt 29 is respectively and fixedly installed in the circumferentially uniform circular groove in the boss upper end of central tube 26, and is integrally formed with central tube 26；It is soft
Property lever system installation in, make flexible lever system top and bottom keep 30~40 degree of angle of inclination to install, while central enclosure
Certain relative distance is kept between 25 times end connectors and the boss upper end of central tube 26, flexible lever system is in the shape of stretching
State；Self-aligning bearing is installed between the boss lower end of central tube 26 and lower case 27 and combines 30, self-aligning bearing combination about 30
End is positioned by the lower end inner wall boss of lower case 27 and the upper end of lock-on connection 32 respectively；In lock-on connection 32 and lower case
The lower end threaded connection place of body 27 is installed and O-ring seal b31, is installed between the inwall of lock-on connection 32 and the lower end outer wall of central tube 26
There is rectangular seal 33.
In the course of work, when normally creeping into, combination disk spring 21 is in compressive state, and promotes anti-lost pipe 22 to drive central tube
26 is axially extending to total length, and the axially extending upper end joint shaft shoulder of central enclosure 25 that passes through of central tube 26 carries out axial limiting；When
When drill bit comes into contact with lithosphere broken rock, the pressure of the drill for being applied to drill bit compresses combination dish by drilling tool center contact lower end boss
Spring 21, it is delivered on central tube 26, is then transferred on drill bit by anti-lost pipe 22；During drilling tool shell turns clockwise,
Transferred torque to by flexible lever system upper end on flexible lever system lower end central tube 26, central tube 26 transfers torque to brill
On head, drill bit is driven to turn clockwise, after the pressure of the drill and moment of torsion are delivered on drill bit, drill bit proceeds by normal drilling；Work as brill
Head run into it is soft or hard there is bit freezing or larger stick-slip phenomenon in drill bit staggeredly or during firm hard formation, its reaction torque being subject to increases
Add, when reaction torque exceedes the limit of initial setting up, drill bit starts to invert, while central tube 26 is driven flexible lever system lower end
Start rotate counterclockwise, and flexible lever system upper end is fixed on 25 times end connectors of central enclosure and is integrally always maintained at dextrorotation
Turn；Now, rotating counterclockwise for flexible lever system lower end shrinks flexible lever system, and the contraction of flexible lever system drives central tube
26 axial shrinkages, so as to reduce the cutting depth of drill bit, central tube 26 drives the anti-lost compression of pipe 22 compression combination disk spring when shrinking
21；With the contraction of central tube 26, the reaction torque that drill bit is subject to is gradually reduced, and when reaction torque disappears, is stored in combination disk spring
The moment of torsion being compressed axially in energy and flexible lever system in 21 is slowly discharged, and central tube 26 is released with the energy of combination disk spring 21
Banish and gradually extend to total length, and normal drilling is proceeded by under the drive of flexible lever system, drill bit does not have always in whole process
Leave rock stratum.
Claims (2)
1. the anti-viscous motion instrument based on flexible link, mainly by vibration damping assembly, adjusting washer, upper body, combination disk spring, anti-lost
Pipe, floating seal ring, dynamic seal ring, central enclosure, central tube, lower case, flexible link, expansion bolt, self-aligning bearing combination,
O-ring seal b, lock-on connection, rectangular seal f compositions；Characterized in that, vibration damping assembly includes top connection (1), rectangular seal
Enclose a (2), rectangular seal b (3), rectangular seal c (4), lock-on connection (5), O-ring seal a (6), top absorbing ring (7),
Top retaining ring (8), anti-lost central tube (9), packing ring (10), middle part absorbing ring (11), spline joint (12), bottom retaining ring
(13), bottom absorbing ring (14), rectangular seal d (15), sealing ring (16), rectangular seal e (17), center contact (18),
Rectangular seal a (2) and rectangular seal b (3) are separately mounted in top connection (1), top absorbing ring (7), which is installed to, to be connect
On head (1), rectangular seal c (4), O-ring seals a (6) and top retaining ring (8), which are arranged on lock-on connection (5), makes four
Person is combined as an entirety, and is threadedly coupled and be fixed with spline joint (12) by lock-on connection (5)；Under top connection (1)
The internal spline of the spline sections at end and spline joint (12), which coordinates, transmits moment of torsion, top connection (1) lower end mounting gasket successively
(10) with middle part absorbing ring (11)；Anti-lost central tube (9) is fitted into top connection (1) endoporus, passes through the internal shaft shoulder of top connection (1)
Anti-lost central tube (9) progress is axially moved down spacing；Bottom retaining ring (13) is installed successively in anti-lost central tube (9) lower end with
Portion's absorbing ring (14), it is another to play installation after rectangular seal d (15) and rectangular seal e (17) is installed on sealing ring (16)
To between anti-lost central tube (9) lower end and center contact (18)；Spline joint (12) is threadedly coupled with center contact (18), anti-lost
Central tube (9) lower end is threadedly coupled with center contact (18), is fixed and is prevented from falling under vibration damping assembly part；Vibration damping assembly lower end,
Center contact (18), upper body (20), central enclosure (25), lower case (27), lock-on connection pass sequentially through between (32)
Threaded connection；Combination disk spring (21), combination disk spring (21) upper end are installed between center contact (18) and upper body (20)
Adjusting washer (19) is installed between center contact (18) lower end boss, and by center contact (18) lower end boss to combination
Disc spring (21) upper end carries out axial limiting；It is provided between center contact (18) lower end and upper body (20) lower end inner wall anti-
Fall pipe (22), anti-lost pipe (22) upper end and end in contact under combination disk spring (21), and axial limit is carried out to combination disk spring (21) lower end
Position；Floating seal ring (23) is installed between anti-lost pipe (22) outer wall and upper body (20) lower end inner wall to combination disk spring
(21) lubricating oil in is sealed；Dynamic sealing is installed between center contact (18) lower end outer wall and anti-lost pipe (22) inwall
Enclose (24)；Anti-lost pipe (22) lower end is connected with central tube (26) by screw thread, and by central enclosure (25) upper end joint shaft shoulder pair
Anti-lost pipe (22) progress axially moves down spacing；End connector is circumferentially uniformly provided with circular groove, flexible lever system under central enclosure (25)
In each flexible link (28) upper end be respectively and fixedly installed to by expansion bolt (29) in equally distributed each circular groove, and with middle part shell
Body (25) is integrally formed；Circumferentially uniformly it is provided with central tube (26) lower end boss upper end circumferential with end connector under central enclosure (25)
The corresponding circular groove of circular groove, during each flexible link (28) lower end is respectively and fixedly installed to by expansion bolt (29) in flexible lever system
In the circumferentially uniform circular groove in heart pipe (26) boss upper end, and it is integrally formed with central tube (26)；In flexible lever system installation, make soft
Property lever system top and bottom keep 30~40 degree of angle of inclination to install, while end connector and central tube under central enclosure (25)
(26) certain relative distance is kept between boss upper end, flexible lever system is in the state of stretching；It is convex in central tube (26)
Self-aligning bearing is installed between platform lower end and lower case (27) to combine (30), self-aligning bearing combination (30) upper and lower side passes through respectively
Lower case (27) lower end inner wall boss and lock-on connection (32) upper end are positioned；In lock-on connection (32) and lower case
(27) installation of lower end threaded connection place and O-ring seal b (31), lock-on connection (32) inwall and central tube (26) lower end outer wall it
Between rectangular seal (33) is installed.
2. the anti-viscous motion instrument according to claim 1 based on flexible link, it is characterised in that flexible link (28) is closed by titanium
Gold is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385147.6A CN106050154B (en) | 2016-06-03 | 2016-06-03 | Anti- viscous motion instrument based on flexible link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610385147.6A CN106050154B (en) | 2016-06-03 | 2016-06-03 | Anti- viscous motion instrument based on flexible link |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106050154A CN106050154A (en) | 2016-10-26 |
| CN106050154B true CN106050154B (en) | 2018-01-02 |
Family
ID=57172057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610385147.6A Expired - Fee Related CN106050154B (en) | 2016-06-03 | 2016-06-03 | Anti- viscous motion instrument based on flexible link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106050154B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109251B (en) * | 2021-11-18 | 2023-08-22 | 西南石油大学 | Control device for composite directional drilling and use method |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1904570B1 (en) * | 1969-01-30 | 1970-08-27 | Inst De Proiectari Si Cercetar | Drill rod damper |
| US3898815A (en) * | 1973-12-06 | 1975-08-12 | Dresser Ind | Pressure and volume compensating system for reciprocating oil field drilling tools |
| US3871193A (en) * | 1973-12-12 | 1975-03-18 | Dresser Ind | Spring load system for drill string shock absorbers |
| US3926265A (en) * | 1974-06-10 | 1975-12-16 | Hydroacoustic Inc | Drill steel for percussive drilling devices |
| US3989409A (en) * | 1975-07-14 | 1976-11-02 | Rolen Arsenievich Ioannesian | Turbodrill |
| US5778987A (en) * | 1996-04-29 | 1998-07-14 | Inco Limited | Guided drilling system with shock absorber |
| NO314053B1 (en) * | 1999-12-28 | 2003-01-20 | Norske Stats Oljeselskap | Torque coupling for use in drill string |
| CN2432326Y (en) * | 2000-06-28 | 2001-05-30 | 曹允良 | Downhole pipe string breakaway vibration damper |
| CN2767638Y (en) * | 2005-02-03 | 2006-03-29 | 中国石油天然气集团公司 | Air mechanical vibration-damper |
| CN2851513Y (en) * | 2005-11-03 | 2006-12-27 | 中国石油天然气集团公司 | Anti-shock transmission shaft assembly |
| RU2405905C1 (en) * | 2009-09-28 | 2010-12-10 | Николай Митрофанович Панин | Disconnecting device |
| CN102140892B (en) * | 2011-01-24 | 2014-11-05 | 中国电建集团中南勘测设计研究院有限公司 | Elastic drill rod joint used for directional drilling |
| CN203383746U (en) * | 2013-08-02 | 2014-01-08 | 中国石油化工集团公司 | Damping and accelerating tool for well drilling |
-
2016
- 2016-06-03 CN CN201610385147.6A patent/CN106050154B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN106050154A (en) | 2016-10-26 |
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| CB03 | Change of inventor or designer information |
Inventor after: Tian Jialin Inventor after: Yang Yi Inventor after: Yuan Changfu Inventor after: Yang Lin Inventor after: Yang Yinglin Inventor after: Wu Chunming Inventor after: Liu Gang Inventor after: Yang Zhi Inventor before: Tian Jialin Inventor before: Yuan Changfu Inventor before: Yang Lin Inventor before: Yang Yinglin Inventor before: Wu Chunming Inventor before: Liu Gang Inventor before: Yang Zhi Inventor before: Wu Bo |
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Granted publication date: 20180102 Termination date: 20180603 |