CN207436916U - Screw double acting speed-raising instrument - Google Patents
Screw double acting speed-raising instrument Download PDFInfo
- Publication number
- CN207436916U CN207436916U CN201721471914.1U CN201721471914U CN207436916U CN 207436916 U CN207436916 U CN 207436916U CN 201721471914 U CN201721471914 U CN 201721471914U CN 207436916 U CN207436916 U CN 207436916U
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- impact
- hammer body
- assembly
- body cylinder
- screw
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Abstract
The utility model provides a kind of screw double acting speed-raising instrument, including power assembly, universal axle assembly, drive assembly and impact assembly.Liquid energy is converted into the mechanical energy of rotation by screw rod by the power assembly, so as to which the rotary valve that impact assembly is driven by universal axle assembly and drive assembly rotates, due to being all provided with hole in rotary valve and valve deck, make drilling fluid periodical into tup and hammer body barrel chamber, hammer body cylinder, which is periodically hit, in the promotion lower ram of liquid generates circumferential jarring, the axial hole of rotary valve and valve deck periodically dislocation simultaneously changes fluid pressure, generate the axial vibrations of high frequency, and pass through lower contact and axial and circumferential impact force is transferred to drill bit, eliminate stick-slip phenomenon, protect drill bit, so as to improve drill bit efficiency of breaking rock.The utility model screw double acting speed-raising instrument generates two kinds of impacts of axial and circumferential under the driving of drilling fluid, can effectively improve drilling efficiency.
Description
Technical field
The utility model is carried on a kind of downhole tool for oil drilling more particularly to a kind of screw double acting
Fast instrument.
Background technology
In oil conventional drilling, PDC drill bit is widely used, when operating at the scene, often because driller's skill
Art, experience problem cause to be applied to the brill of drill bit so that send brill not in time or send drill-through fast or because borehole wall frictional resistance problem
It presses unstable, influences efficiency of breaking rock, it could even be possible to damaging drill bit, the cutting tooth for the drill bit that bursts apart because of bit pressure increase suddenly
Deng influencing rate of penetration.When boring hard or abrasive layer, usually not enough torques crush another aspect PDC drill bit
Rock, the phenomenon that so as to generate bit freezing, the release of downhole tool torsion causes drill bit to fail.Oil field deep formation rock is hard, grinds
It is high to grind extreme value, using conventional roller bit cutting, single footage per bit is few, it is necessary to multiple trips and rate of penetration is relatively low.This
Outside, rate of penetration can largely be improved using air drilling drilling, but easily causes underground in the case of formation water output
Complex situations occur, and gas drilling corollary equipment is more, and cost is relatively large.
In view of the above problems, having attempted multiple types of tools both at home and abroad, certain speed-increasing effect, medium-high frequency torsion are achieved
Impact class instrument accounts for the leading position of speed-raising instrument.Such instrument can give drill bit additional high torsional pulse power, aid in drill bit
Broken rock reduces the stick-slip phenomenon of drill string, improves rate of penetration.The speed-raising instrument of axial impact type has also been emerged in recent years,
Such instrument can increase substantially the rock depth of tooth penetration of drill bit, increase efficiency of breaking rock, have that easy to operate, speed-increasing effect is good
The features such as.Therefore, it is necessary to research and develop a kind of power that can be provided by drilling fluid, axial impact can be both provided, it can also
Both the compound doulde-action DTH hammer circumferentially impacted is provided, while have the advantages that, drill bit broken rock is aided in, protects drill bit, is extended
Drilling life of bit improves rate of penetration.
The content of the invention
In order to solve the stick-slip phenomenon of drill bit bit freezing and drill string in drilling process, it is proposed that a kind of screw double acting carries
Fast instrument the defects of to overcome the prior art, improves rate of penetration.The instrument has axial impact and circumferential impact, energy simultaneously
Effectively protection drill bit, reduces cost, improves efficiency of breaking rock, increases drilling efficiency.
The technical solution of the utility model is：Screw double acting speed-raising instrument is by power assembly, universal axle assembly, biography
Dynamic assembly and impact assembly composition, power assembly front end are sequentially connected universal axle assembly, drive assembly and impact assembly；Described
Power assembly includes top connection, anti-lost locknut, anti-lost connecting rod, stator case, rubber bushing and screw rotor, rubber bushing installation
Screw stator is formed inside stator case, screw rotor and screw stator are mutually ratcheting, in the driving lower band turn of drilling fluid
Son rotation, top connection are connected by screw thread with stator case, and anti-lost connecting rod front end connects anti-lost locknut, and rear end connecting screw turns
Son；The universal axle assembly includes live strand, ball seat, pressure-bearing ball, drive ball, sealing ring, lock sleeve, sealing shroud and connecting rod, ball
Seat be mounted on it is living twist internal, for pressure-bearing ball by being placed on ball seat, drive ball is placed in interlinking lever end groove, using lock sleeve by connecting rod
Coordinate with strand living, and strand inside living is sealed using sealing ring and sealing shroud, connecting rod two end mounting structure is identical；The transmission is total
Into including water cap, universal shaft housing, washer, transmission shaft, upper bearing (metal) moving-coil, upper bearing (metal) Jing Quan, woodruff key, bear box, string axis
It holds and crossover sub, universal shaft housing rear end connecting stator housing, front end connection bear box, water cap rear end connection universal shaft is total
Into, front end connection transmission shaft, and washer is placed in water cap and transmission shaft, upper bearing (metal) moving-coil is installed by screw thread on transmission shaft,
It is circumferentially fixed in axis by woodruff key that bear box installs upper bearing (metal) Jing Quan, string bearing and crossover sub, upper bearing (metal) Jing Quan successively
Hold enclosure interior；The impact assembly include rotary valve, sleeve, valve deck, impact housing, tup, hammer body cylinder, locking cylinder and under
Connector, the rear end of rotary valve are threadedly secured to transmission shaft front end, and valve deck is mounted on the end face of hammer body cylinder, and tup is mounted on valve
Between lid and hammer body cylinder, hammer body cylinder is mounted on the inside of impact housing, is threadedly coupled by locking cylinder and hammer body cylinder by lower contact
It is axially fixed on impact housing, impact housing is threadedly coupled with crossover sub, the side of hammer body cylinder and impact housing by dental inlay
Formula is circumferentially fixed with lower contact, and sleeve is mounted between crossover sub and hammer body cylinder；By the screw rod of power assembly by liquid energy
Amount is converted into the mechanical energy of rotation, so as to drive the rotary valve rotation of impact assembly, due to being all provided with hole in rotary valve and valve deck,
Make drilling fluid periodical into tup and hammer body barrel chamber, periodically hitting hammer body cylinder in the promotion lower ram of liquid generates circumferential shake
It hits, while the periodically dislocation of the axial hole of rotary valve and valve deck changes fluid pressure, generates the axial vibrations of high frequency, and passes through
Axial and circumferential impact force is transferred to drill bit by lower contact, eliminates stick-slip phenomenon, prevents bit freezing, improves efficiency of breaking rock.
Screw double acting speed-raising instrument described in said program, it is characterised in that：The preceding end plate of the rotary valve
Face is opened there are two symmetrical scallop hole, is circumferentially opened there are two symmetrical circular hole in back end cylindrical, rotary valve is in the band of screw rotor
Dynamic lower rotation, and make fluid pressure cyclically-varying under the action of valve deck, generate axial vibrations impact；The valve deck is provided with
4 fan-shaped inlet openings, including two impact inlet openings and two reset backhaul inlet openings, rotary valve rotation makes the liquid cycle
Property enter impact inlet opening and reset backhaul inlet opening, liquid entered the intracavitary of tup and hammer body cylinder by inlet opening, utilizes liquid
Pressure promotes tup to be rotated in hammer body cylinder indentation, there, and liquid enters from impact inlet opening promotes tup circumferential direction positive direction to hit hammer body
Cylinder, liquid enter promotion tup circumferential direction negative direction return from backhaul inlet opening is resetted, and the sectional area ratio for impacting inlet opening resets back
The area of journey inlet opening is big, realizes single-revolution to impact.
Screw double acting speed-raising instrument described in said program, it is characterised in that：The hammer body cylinder hits end and opens
There are two step notches being distributed, internal thread is machined in front end, for coordinating with the external screw thread of locking cylinder.
Screw double acting speed-raising instrument described in said program, it is characterised in that：The power assembly only provides
Rotary valve rotates, and big torque need not be provided, so the length of power assembly is shorter.
The beneficial effects of the utility model are：(1) solve that down-hole equipment in drilling process be easy to cause is hampered or meets
The problem of card；(2) tool design is reasonable, dependable performance, while generating circumferential impact, can also generate axial vibration impact,
So as to effectively protect drill bit, the stick-slip of drill bit and bit freezing phenomenon are eliminated, improves rate of penetration；（3）The instrument is adaptable, not only
Can be applied to deep layer straight well, can also cooperating with screw drill tool and orientation device be applied in directional well and horizontal well；(4) instrument
Power assembly energy conversion efficiency is high, axial dimension is short；（5）The instrument has action without dead point, is big, anti-in circumferential forward impact power
To impact force it is small the advantages that impact assembly；（6）The advantages that easy to operate, long lifespan, speed-increasing effect are good, cooperation PDC drill bit use
Deep well hard formation rate of penetration can be effectively improved.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Fig. 2 is the Section A-A figure in the utility model Fig. 1.
Fig. 3 is the section B-B figure in the utility model Fig. 1.
Fig. 4 is the C-C sectional views in the utility model Fig. 1.
Fig. 5 is the utility model impact site 3-D view.
Fig. 6 is rotary valve structure schematic three dimensional views.
Fig. 7 is valve cover structure schematic three dimensional views.
Fig. 8 is hammehead structure schematic three dimensional views.
Fig. 9 is hammer body barrel structure schematic three dimensional views.
1. top connection in figure, 2. anti-lost locknuts, 3. anti-lost connecting rods, 4. stator cases, 5. rubber bushings, 6. screw rotors,
It is twisted 7. living, 8. ball seats, 9. pressure-bearing balls, 10. drive balls, 11. sealing rings, 12. lock sleeves, 13. sealing shrouds, 14. connecting rods, 15. water
Cap, 16. universal shaft housings, 17. washers, 18. transmission shafts, 19. upper bearing (metal) moving-coils, 20. upper bearing (metal) Jing Quan, 21. woodruff keies, 22.
Bear box, 23. string bearings, 24. crossover subs, 25. rotary valves, 26. sleeves, 27. valve decks, 28. impact housings, 29. tups,
30. hammer body cylinder, 31. locking cylinders, 32. lower contacts.
Specific embodiment
With reference to the accompanying drawings and embodiments, the utility model is described in detail.
Referring to attached drawing, the screw double acting raises speed instrument by power assembly, universal axle assembly, drive assembly and punching
Assembly composition is hit, power assembly front end is sequentially connected universal axle assembly, drive assembly and impact assembly；The power assembly bag
Top connection 1, anti-lost locknut 2, anti-lost connecting rod 3, stator case 4, rubber bushing 5 and screw rotor 6 are included, rubber bushing 5 is mounted on
4 inside composition screw stator of stator case, screw rotor 6 and screw stator are mutually ratcheting, in the driving lower band turn of drilling fluid
Son 6 rotates, and top connection 1 is connected by screw thread with stator case 4, and anti-lost 3 front end of connecting rod connects anti-lost locknut 2, rear end connection spiral shell
Bar rotor 6；The universal axle assembly includes the living 7, ball seat 8, pressure-bearing ball 9, drive ball 10, sealing ring 11, lock sleeve 12, close of twisting
Big envelope 13 and connecting rod 14, ball seat 8 are mounted on inside strand 7 living, and for pressure-bearing ball 9 by being placed on ball seat 8, drive ball 10 is placed in connecting rod 14
End recesses, using lock sleeve 12 by connecting rod（14）Coordinate with strand 7 living, and utilize sealing ring 11 and the sealing of sealing shroud 13 strand 7 living
Inside, 14 both ends mounting structure of connecting rod is identical, and the power assembly only provides rotary valve 25 and rotates, and need not provide big torsion
Square, so the length of power assembly is shorter.
The drive assembly include water cap 15, universal shaft housing 16, washer 17, transmission shaft 18, upper bearing (metal) moving-coil 19, on
The quiet circle 20 of bearing, woodruff key 21, bear box 22, string bearing 23 and crossover sub 24,16 rear end connecting stator of universal shaft housing
Housing 4, front end connection bear box 22,15 rear end of water cap connect universal axle assembly, and front end connects transmission shaft 18, and in water cap 15
Washer 17 is placed with transmission shaft 18, upper bearing (metal) moving-coil 19 is installed on transmission shaft 18 by screw thread, installed successively in bear box 22
The quiet circle 20 of upper bearing (metal), string bearing 23 and crossover sub 24, the quiet circle 20 of upper bearing (metal) are circumferentially fixed in bear box by woodruff key 21
Inside 22.
The impact assembly include rotary valve 25, sleeve 26, valve deck 27, impact housing 28, tup 29, hammer body cylinder 30,
Locking cylinder 31 and lower contact 32, the rear end of rotary valve 25 are threadedly secured to 18 front end of transmission shaft, and valve deck 27 is mounted on hammer body
The end face of cylinder 30, tup 29 are mounted between valve deck 27 and hammer body cylinder 30, and hammer body cylinder 30 is mounted on the inside of impact housing 28, are led to
It crosses locking cylinder 31 and hammer body cylinder 30 is threadedly coupled and lower contact 32 is axially fixed on impact housing 28, hammer body cylinder 30, which hits end, to be opened
There are two step notches being distributed, internal thread is machined in front end, for coordinating with the external screw thread of locking cylinder 31, impact housing
28 are threadedly coupled with crossover sub 24, and hammer body cylinder 30 and impact housing 28 are circumferentially fixed with lower contact 32 by way of dental inlay,
Sleeve 26 is mounted between crossover sub 24 and hammer body cylinder 30；Liquid energy is converted by rotation by the screw rod of power assembly
Mechanical energy so as to which the rotary valve 25 for driving impact assembly rotates, due to being all provided with hole in rotary valve 25 and valve deck 27, makes drilling fluid
Periodically into 30 intracavitary of tup 29 and hammer body cylinder, periodically hit hammer body cylinder in the promotion lower ram 29 of liquid and generate circumferential shake
It hits, while the periodically dislocation of the axial hole of rotary valve 25 and valve deck 27 changes fluid pressure, generates the axial vibrations of high frequency, and
Axial and circumferential impact force is transferred to by drill bit by lower contact 32, stick-slip phenomenon is eliminated, prevents bit freezing, improve efficiency of breaking rock.
The front end disk of the rotary valve 25 is opened there are two symmetrical scallop hole, circumferentially opens that there are two right in back end cylindrical
The circular hole of title, rotary valve 25 rotate under the drive of screw rotor 6, and under the action of valve deck 27 fluid pressure are made periodically to become
Change, generate axial vibrations impact；The valve deck 27 is provided with 4 fan-shaped inlet openings, including two impact inlet openings and two
A reset backhaul inlet opening, the rotation of rotary valve 25 make liquid periodically into impact inlet opening and reset backhaul inlet opening, liquid
Enter the intracavitary of tup 29 and hammer body cylinder 30 by inlet opening, rotated using hydraulic drive tup 29 in 30 indentation, there of hammer body cylinder,
Liquid enters from impact inlet opening promotes the circumferential positive direction of tup 29 to hit hammer body cylinder 30, and liquid enters from backhaul inlet opening is resetted
The circumferential negative direction return of tup 29 is promoted, the sectional area for impacting inlet opening is bigger than the area for resetting backhaul inlet opening, it can be achieved that single
Circumferential impact.
Claims (4)
- The instrument 1. screw double acting is raised speed, it is characterised in that：The screw double acting raises speed instrument by power assembly, ten thousand To axle assembly, drive assembly and impact assembly composition, power assembly front end is sequentially connected universal axle assembly, drive assembly and impact Assembly；The power assembly includes top connection (1), anti-lost locknut (2), anti-lost connecting rod (3), stator case (4), rubber bushing (5) and screw rotor (6), rubber bushing (5) are mounted on composition screw stator, screw rotor (6) and spiral shell inside stator case (4) Bar stator is mutually ratcheting, and in driving lower band turn sub (6) rotation of drilling fluid, top connection (1) passes through screw thread and stator case (4) Connection, anti-lost connecting rod (3) front end connect anti-lost locknut (2), rear end connecting screw rotor (6)；The universal axle assembly includes It is living to twist (7), ball seat (8), pressure-bearing ball (9), drive ball (10), sealing ring (11), lock sleeve (12), sealing shroud (13) and connecting rod (14), ball seat (8) is mounted on strand (7) inside living, and for pressure-bearing ball (9) by being placed on ball seat (8), drive ball (10) is placed in connecting rod (14) connecting rod (14) and twist (7) living using lock sleeve (12) are coordinated, and utilize sealing ring (11) and sealing shroud by end recesses (13) sealing twist (7) living are internal, and connecting rod (14) both ends mounting structure is identical；The drive assembly includes water cap (15), universal Shaft housing (16), washer (17), transmission shaft (18), upper bearing (metal) moving-coil (19), upper bearing (metal) Jing Quan (20), woodruff key (21), bearing Housing (22), string bearing (23) and crossover sub (24), universal shaft housing (16) rear end connecting stator housing (4), front end connection Bear box (22), water cap (15) rear end connects universal axle assembly, front end connection transmission shaft (18), and in water cap (15) and is driven Axis (18) places washer (17), and upper bearing (metal) moving-coil (19) is installed by screw thread on transmission shaft (18), in bear box (22) successively Upper bearing (metal) Jing Quan (20), string bearing (23) and crossover sub (24) are installed, upper bearing (metal) Jing Quan (20) is circumferential by woodruff key (21) It is internal to be fixed on bear box (22)；The impact assembly includes rotary valve (25), sleeve (26), valve deck (27), impact shell Body (28), tup (29), hammer body cylinder (30), locking cylinder (31) and lower contact (32), the rear end of rotary valve (25) are consolidated by screw thread Transmission shaft (18) front end is scheduled on, valve deck (27) is mounted on the end face of hammer body cylinder (30), and tup (29) is mounted on valve deck (27) and hammer Between body cylinder (30), hammer body cylinder (30) is mounted on the inside of impact housing (28), passes through locking cylinder (31) and hammer body cylinder (30) spiral shell Lower contact (32) is axially fixed on impact housing (28) by line connection, and impact housing (28) connects with crossover sub (24) screw thread It connects, hammer body cylinder (30) and impact housing (28) are circumferentially fixed with lower contact (32) by way of dental inlay, and sleeve (26) is mounted on Between crossover sub (24) and hammer body cylinder (30)；Liquid energy is converted into the mechanical energy of rotation by the screw rod of power assembly, So as to drive rotary valve (25) rotation of impact assembly, due to being all provided with hole in rotary valve (25) and valve deck (27), make drilling fluid Periodically into tup (29) and hammer body cylinder (30) intracavitary, periodically hit hammer body cylinder in the promotion lower ram (29) of liquid and generate week To jarring, while the periodically dislocation of the axial hole of rotary valve (25) and valve deck (27) changes fluid pressure, generates the axis of high frequency To vibrations, and pass through lower contact (32) and axial and circumferential impact force is transferred to drill bit.
- The instrument 2. screw double acting according to claim 1 is raised speed, it is characterised in that：Before the rotary valve (25) End plate face is opened there are two symmetrical scallop hole, is circumferentially opened there are two symmetrical circular hole in back end cylindrical, rotary valve (25) is in screw rod It is rotated under the drive of rotor (6), and makes fluid pressure cyclically-varying under the action of valve deck (27), generate axial vibrations punching It hits.
- The instrument 3. screw double acting according to claim 1 is raised speed, it is characterised in that：The valve deck (27) is provided with 4 A sector inlet opening, including two impact inlet openings and two reset backhaul inlet openings, rotary valve (25) rotation makes liquid Periodically into impact inlet opening and backhaul inlet opening is resetted, liquid enters tup (29) and hammer body cylinder (30) by inlet opening Intracavitary is rotated using hydraulic drive tup (29) in hammer body cylinder (30) indentation, there, and liquid enters promotion tup from impact inlet opening (29) circumferential positive direction hits hammer body cylinder (30), and liquid enters from reset backhaul inlet opening promotes the circumferential negative direction of tup (29) to return Position, impacts that the sectional area of inlet opening is bigger than the area for resetting backhaul inlet opening, it can be achieved that single-revolution is to impact.
- The instrument 4. screw double acting according to claim 1 is raised speed, it is characterised in that：The hammer body cylinder (30), hits It hits end and is provided with two step notches being distributed, internal thread is machined in front end, for coordinating with the external screw thread of locking cylinder (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471914.1U CN207436916U (en) | 2017-11-07 | 2017-11-07 | Screw double acting speed-raising instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471914.1U CN207436916U (en) | 2017-11-07 | 2017-11-07 | Screw double acting speed-raising instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207436916U true CN207436916U (en) | 2018-06-01 |
Family
ID=62292134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721471914.1U Expired - Fee Related CN207436916U (en) | 2017-11-07 | 2017-11-07 | Screw double acting speed-raising instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207436916U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108756732A (en) * | 2018-08-02 | 2018-11-06 | 西南石油大学 | Circumferential impactor based on screw rod and spring |
| CN108798503A (en) * | 2018-07-31 | 2018-11-13 | 西南石油大学 | Screw circumferential direction percussion drilling tool |
| CN110454083A (en) * | 2019-08-21 | 2019-11-15 | 北京众英泰科能源科技有限公司 | Drill bit with circumferential rotary impact force |
| CN110513036A (en) * | 2019-08-21 | 2019-11-29 | 北京众英泰科能源科技有限公司 | Screw drill with circumferential rotary impact force |
| CN112112556A (en) * | 2020-11-20 | 2020-12-22 | 东营市正能石油科技有限公司 | Screw drill for oil field drilling operation |
| CN112627721A (en) * | 2020-12-19 | 2021-04-09 | 李永和 | Continuous axial impact rock breaking hammer |
| CN113756709A (en) * | 2021-09-14 | 2021-12-07 | 中海石油(中国)有限公司湛江分公司 | Efficient and auxiliary rock breaking composite impactor |
| CN114059918A (en) * | 2020-07-30 | 2022-02-18 | 中国石油化工集团有限公司 | Hydraulic pulse vibration integrated tool based on rotor driving |
-
2017
- 2017-11-07 CN CN201721471914.1U patent/CN207436916U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798503A (en) * | 2018-07-31 | 2018-11-13 | 西南石油大学 | Screw circumferential direction percussion drilling tool |
| CN108798503B (en) * | 2018-07-31 | 2023-08-08 | 西南石油大学 | Screw type circumferential impact drilling tool |
| CN108756732A (en) * | 2018-08-02 | 2018-11-06 | 西南石油大学 | Circumferential impactor based on screw rod and spring |
| CN108756732B (en) * | 2018-08-02 | 2023-11-14 | 西南石油大学 | Circumferential impactor based on screw and spring |
| CN110454083B (en) * | 2019-08-21 | 2021-09-14 | 北京众英泰科能源科技有限公司 | Drill bit with circumferential rotary impact force |
| CN110513036B (en) * | 2019-08-21 | 2021-09-17 | 东营利丰化工新材料有限公司 | Screw drill with circumferential rotary impact force |
| CN110513036A (en) * | 2019-08-21 | 2019-11-29 | 北京众英泰科能源科技有限公司 | Screw drill with circumferential rotary impact force |
| CN110454083A (en) * | 2019-08-21 | 2019-11-15 | 北京众英泰科能源科技有限公司 | Drill bit with circumferential rotary impact force |
| CN114059918A (en) * | 2020-07-30 | 2022-02-18 | 中国石油化工集团有限公司 | Hydraulic pulse vibration integrated tool based on rotor driving |
| CN112112556A (en) * | 2020-11-20 | 2020-12-22 | 东营市正能石油科技有限公司 | Screw drill for oil field drilling operation |
| CN112627721A (en) * | 2020-12-19 | 2021-04-09 | 李永和 | Continuous axial impact rock breaking hammer |
| CN112627721B (en) * | 2020-12-19 | 2022-11-01 | 盘锦卓汇钻井技术开发有限责任公司 | Continuous axial impact rock breaking hammer |
| CN113756709A (en) * | 2021-09-14 | 2021-12-07 | 中海石油(中国)有限公司湛江分公司 | Efficient and auxiliary rock breaking composite impactor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180601 Termination date: 20181107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |