CN108798532A - A kind of underground pressure torsion poising tool - Google Patents
A kind of underground pressure torsion poising tool Download PDFInfo
- Publication number
- CN108798532A CN108798532A CN201810544245.9A CN201810544245A CN108798532A CN 108798532 A CN108798532 A CN 108798532A CN 201810544245 A CN201810544245 A CN 201810544245A CN 108798532 A CN108798532 A CN 108798532A
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- China
- Prior art keywords
- central tube
- fluid cylinder
- wall
- cylinder set
- baffle ring
- Prior art date
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Classifications
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- 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
- E21B12/00—Accessories for drilling tools
-
- 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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/04—Automatic control of the tool feed in response to the torque of the drive ; Measuring drilling torque
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to petroleum drilling technology field, more particularly to a kind of underground pressure turns round poising tool.The central tube I of the device is mounted in fluid cylinder set, I upper end of central tube is provided with the boss sealed between liquid inboard wall of cylinder liner, baffle ring I is connected on central tube I, upper damping cavity is formed between central tube I, fluid cylinder set and I upper surface of baffle ring, II upper end of central tube is sleeved on I lower end outside of central tube and can be moved up and down along central tube I, elastic mechanism I is installed, central tube II is articulated on liquid inboard wall of cylinder liner step between II upper surface of central tube and baffle ring I.The present invention realizes being capable of adjust automatically drill bit bit pressure in real time, limitation drilling torque, and then stabilizing tool face, ensure build angle rate, reducing drilling tool backing pressure influences orientation, ensure that steady, the high speed of drill bit are crept into, reduces construction risk, can be widely applied in high angle hole, extended reach well and Horizontal Well Drilling well construction.
Description
Technical field：
The present invention relates to petroleum drilling technology field, more particularly to a kind of underground pressure turns round poising tool.
Background technology：
In recent years, with the needs of the development of drilling technology and oil-gas field development, directional well drilling technology has become oil
Hide an important channel of Efficient Development.The long working life of PDC drill bit, bit speed is high, has excellent performance, therefore obtain
To being widely applied.But PDC drill bit torque during directional well slipping drilling is changed by bit pressure, pumpage, formation lithology
Influence it is bigger, have the characteristics that lithology it is miscellaneous, it is soft or hard staggeredly, crept into the more stratum of interlayer when, be susceptible to problems with：
(1) torque is excessive, suppress jump phenomenon it is serious, strong axial impact can apply excessively high bit pressure to Cutter and induce card
Sliding movement not only reduces the drilling depth of rate of penetration and single drill bit, also add motor braking, equipment failure and abrasion can
Energy property brings some potential safety problems to quick and stable drilling；(2) it causes tool-face unstable, needs frequently to repeat pendulum tool
Face operation, reduces bit speed, extends drilling period；(3) there is drilling tool backing pressure, continue to pressurize after backing pressure, bit pressure may
It discharging suddenly and leads to the uneven downslide of drill string, drill bit hits shaft bottom, or even damage drill bit and mud motor suddenly sometimes,
It is also possible to lead to suppress pump, brings downhole safety hidden danger, seriously affect bit speed, build angle rate and safety.Therefore, it is badly in need of a kind of
The real-time adjust automatically bit pressure of energy, the rapid drilling tool for limiting torque.
Invention content：
The technical problem to be solved in the present invention is to provide a kind of underground pressures to turn round poising tool, and the arrangement achieves can be real-time
Adjust automatically drill bit bit pressure, limitation drilling torque, and then stabilizing tool face, ensure build angle rate, reduce drilling tool backing pressure to orienting shadow
It rings, it is ensured that steady, the high speed of drill bit are crept into, and are reduced construction risk, be can be widely applied to high angle hole, extended reach well and horizontal well
In wellbore construction.Overcoming existing PDC drill bit, when bad ground is crept into, easily generation torque is excessive, card is sliding, suppresses jump, tool-face not
The deficiency of phenomena such as steady.
The technical solution used in the present invention is：A kind of underground pressure torsion poising tool, including top connection and fluid cylinder set, above connect
Head lower end connects fluid cylinder set；Central tube I is mounted in fluid cylinder set, and I upper end of central tube is provided with to be sealed between liquid inboard wall of cylinder liner
Boss, baffle ring I is connected on central tube I, upper damping cavity, central tube are formed between central tube I, fluid cylinder set and I upper surface of baffle ring
II upper end is sleeved on I lower end outside of central tube and can be moved up and down along central tube I, between II upper surface of central tube and baffle ring I
Elastic mechanism I is installed, central tube II is articulated on liquid inboard wall of cylinder liner step, and central tube II can move up and down simultaneously along fluid cylinder set
It can cover and rotate with fluid cylinder, form lower damping cavity between I lower face of baffle ring, central tube I, fluid cylinder set and II upper surface of central tube,
It is full of filling liquid in lower damping cavity, the check valve I for allowing liquid to flow into upper damping cavity from lower damping cavity is separately installed on baffle ring I
The check valve II of lower damping cavity is flowed into from upper damping cavity with permission liquid；
II lower end of central tube connects transit joint, and transit joint lower end connects sheath II, and transit joint is sleeved on central tube
III outside and the installed thrust bearing I between central tube III, II lower end of sheath are sleeved on III outside of central tube, III outer wall of central tube
On be provided with the keyway mechanism I with spherical keyway I, transit joint lower end is designed with the keyway mechanism with spherical keyway II
II, sheath I is arranged in II interior installation spherical key of corresponding spherical shape keyway I and spherical keyway, spherical key lower end, and I lower end of sheath is set
Elastic mechanism II is set, baffle ring IV, installed thrust bearing II, thrust axis between baffle ring IV and sheath II are connected on III outer wall of central tube
It holds II to be sleeved on central tube III, III lower end of central tube connects lower contact.
I upper end boss of central tube is limited between top connection lower face and liquid inboard wall of cylinder liner step.
It is sealed by sealing ring III between central tube II and central tube I, mud-scraping ring is installed on II upper end inner wall of central tube
Ⅰ。
It is sealed by sealing ring IV between central tube II and liquid inboard wall of cylinder liner, the central tube II being in contact with liquid inboard wall of cylinder liner
Mud-scraping ring II is installed on outer wall.
Baffle ring II is set between II outer wall step of central tube and liquid inboard wall of cylinder liner step.
The injection hole being connected with lower damping cavity is set on fluid cylinder set side wall, which is blocked by closure screw.
It is connected using spline between II outer wall of central tube and liquid inboard wall of cylinder liner.
Elastic mechanism I and elastic mechanism II are spring.
II lower end of elastic mechanism connects regulation ring, and regulation ring lower end connects adjusting screw, and adjusting screw is threaded in gear
On ring III, baffle ring III is connected on III outer wall of central tube.
The beneficial effects of the invention are as follows：The present invention, which realizes, adjust automatically drill bit bit pressure, limitation to creep into torque in real time,
And then stabilizing tool face, ensure build angle rate, reducing drilling tool backing pressure influences orientation, it is ensured that steady, the high speed of drill bit are crept into, and are reduced
Construction risk can be widely applied in high angle hole, extended reach well and Horizontal Well Drilling well construction.
Description of the drawings：
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural diagram of the present invention.
Fig. 2 be in Fig. 1 A-A to diagrammatic cross-section.
The structural schematic diagram of pipe III centered on Fig. 3.
Fig. 4 is B-B direction diagrammatic cross-section in Fig. 3.
Specific implementation mode：
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of underground pressure turns round poising tool, including top connection 1 and fluid cylinder set 2, above connects
First 1 lower end connection fluid cylinder set 2；Central tube I 3 be mounted on fluid cylinder set 2 in, I 3 upper end of central tube be provided with fluid cylinder cover 2 inner walls it
Between the boss that seals, connect baffle ring I 5 on central tube I 3, formed and hindered between central tube I 3, fluid cylinder set 2 and I 5 upper surface of baffle ring
Buddhist nun's chamber, II 11 upper end of central tube are sleeved on I 3 lower end outside of central tube and can be moved up and down along central tube I 3, central tube II 11
Elastic mechanism I 9 is installed, central tube II 11 is articulated in fluid cylinder and covers on 2 inner wall steps, central tube II between upper surface and baffle ring I 5
11 can along fluid cylinder cover 2 move up and down and can with fluid cylinder cover 2 rotation, I 5 lower face of baffle ring, central tube I 3, fluid cylinder cover 2 and in
Lower damping cavity is formed between II 11 upper surface of heart pipe, is full of silicone oil in lower damping cavity, permission liquid is separately installed on baffle ring I 5
The check valve I 6 of upper damping cavity is flowed into from lower damping cavity and allows liquid from the check valve II 7 of the lower damping cavity of upper damping cavity inflow；
II 11 lower end of central tube connects transit joint 17, and 17 lower end of transit joint connects sheath II 29,17 sets of transit joint
On the outside of central tube III 18 and the installed thrust bearing I 19 between central tube III 18, II 29 lower end of sheath are sleeved on central tube
On the outside of III 18, the keyway mechanism I 31 with spherical keyway I 32 is provided on III 18 outer wall of central tube, 17 lower end of transit joint is set
In respect of the keyway mechanism II with spherical keyway II, spherical key 21 is installed in corresponding spherical shape keyway I 32 and spherical keyway II,
Sheath I 22 is arranged in 21 lower end of spherical key, and I 22 lower end of sheath is arranged elastic mechanism II 23, baffle ring is connected on III 18 outer wall of central tube
IV 27, installed thrust bearing II 28 between baffle ring IV 27 and sheath II 29, thrust bearing II 28 is sleeved on central tube III 18, in
III 18 lower end of heart pipe connects lower contact 30.
I 3 upper end boss of central tube is limited between 1 lower face of top connection and fluid cylinder 2 inner wall steps of set.
It is sealed by sealing ring III 12 between central tube II 11 and central tube I 3, is equipped on II 11 upper end inner wall of central tube
Mud-scraping ring I 13, mud-scraping ring I 13 is for scraping mud cleaning.
Central tube II 11 and fluid cylinder are sealed between covering 2 inner walls by sealing ring IV 14, in being in contact with fluid cylinder 2 inner walls of set
Mud-scraping ring II 15 is installed on II 11 outer wall of heart pipe.Mud-scraping ring II 15 is for scraping mud cleaning.
Baffle ring II 16 is arranged between covering 2 inner wall steps in II 11 outer wall step of central tube and fluid cylinder.Baffle ring II 16 is in two-flap type
Design avoids central tube II 11 from covering 2 hard breakdowns with fluid cylinder for buffering.
Fluid cylinder covers the injection hole for being arranged on 2 side walls and being connected with lower damping cavity, which is blocked by closure screw 10.
II 11 outer wall of central tube and fluid cylinder are connected between covering 2 inner walls using spline.
Elastic mechanism I 9 and elastic mechanism II 23 are spring.
II 23 lower end of elastic mechanism connects regulation ring 24, and 24 lower end of regulation ring connects adjusting screw 26,26 spiral shell of adjusting screw
Line is connected on baffle ring III 25, and baffle ring III 25 is connected on III 18 outer wall of central tube.Screw-in by adjusting screw 26 and back-out
The intensity of adjustable elastic mechanism II 23, to adjust the degree of cooperation between transit joint 17, spherical key 21 and sheath I 22.
It is sealed by sealing ring V 20 between transit joint 17 and central tube III 18.I 3 upper end boss of central tube and fluid cylinder set
It is sealed by sealing ring I 4 between 2 inner walls.I 5 outside of baffle ring and fluid cylinder are sealed between covering 2 inner walls by sealing ring II 8.
The present invention can be achieved at the same time two functions, that is, stablize bit pressure and limitation torque.When live wellbore construction, tool connects
It is connected on above screw rod, specific installation site can be depending on on-site actual situations.For tubing string after designated depth, turn on pump recycles mud
Slurry, mud generate pressure drop when flowing through tool and following drilling tool, form down thrust, and it is in exceptionally straight state to make tool.Top drilling tool to
When lower application bit pressure, tool can apply flowed friction upwards, while tool is pressurized and shrinks a trip, and central tube II 11 is with respect to liquid
2 uplink of cylinder sleeve, elasticity of compression mechanism I 9 reduce with damping cavity at present, and silicone oil therein is compressed, and pressure rise is by check valve
I 6 open, and part silicone oil is entered with high flow velocities inside upper damping cavity, and certain resistance is also suffered from when flowing through check valve I 6, to
Play the role of energy-absorbing buffering.Top drilling tool pressure, mud flowed friction, elastic construction resistance to compression pression and silicone oil hydraulic damping effect
Four synthesis, effectively transmit bit pressure, ensure normal drilling.At this point, tool is in compressive state, but central tube II 11 not completely into
Enter fluid cylinder set 2, tool is in " suspension " state with upper drill.When bit pressure becomes larger suddenly, above-mentioned action, elastic mechanism I 9 are repeated
Continue to compress, store energy, silicone oil flows to upper damping cavity by lower damping cavity, mud flowed friction, elastic construction resistance to compression pression and
The damping action of silicone oil flowing plays cushioning effect to bit pressure；When bit pressure reduces, the energy that elastic mechanism I 9 stores gradually is released
It puts, central tube II 11 covers 2 downlinks with respect to fluid cylinder, pressurizes for drill bit, and damping cavity increases at present for this, silicone oil expansion, silicone oil therein
Pressure is less than the silicone oil pressure in upper damping cavity, and check valve II 7 is opened, and silicone oil returns inside lower damping cavity, is similarly subjected to unidirectional
The resistance of valve II 7, plays cushioning effect.By above-mentioned effect, tool can be inhaled by " hydraulic damping+elasticity " structure of design
It receives or release bit pressure, realization automatic bit pressure matching in real time keeps drill bit bit pressure basicly stable.Especially when occurring in drilling process
When backing pressure phenomenon, bit pressure is persistently increased, backing pressure may discharge suddenly.In the case that not connected pressure turns round poising tool, backing pressure is unexpected
Release is likely to result in the uneven downslide of drill string, and drill bit hits shaft bottom suddenly sometimes, or even can damage drill bit and screw rod.Connection pressure
After turning round poising tool, tool can effectively absorb backing pressure release so that the instant impact that backing pressure release generates is not transferred to
On drill bit, mitigate tool vibration, steady drill bit bit pressure.To reduce tool-face unstable phenomenon odds, while also having
Effect reduces the occurrence probability and construction risk of down hole problem, improves operating efficiency.
When normal drilling, drill string can effectively transmit torque, and torque is transferred to fluid cylinder successively from top drilling tool via top connection 1
Set 2, central tube II 11, transit joint 17, spherical key 21, central tube III 18, lower contact 30, are finally transmitted to lower drilling tool.Its
Torque, transit joint 17, spherical key 21 and III 18 shape of central tube are transmitted by spline pair between middle fluid cylinder set 2 and central tube II 11
At spherical key transferring structure, other parts are transmitted by screw thread.When torque is excessive, spherical key 21 is from transit joint 17 and center
It is exited downwards in the spherical keyway of pipe III 18, the extruding sheath I 22 of spherical key 21, elasticity of compression mechanism II 23, spherical key passes at this time
Structure destruction is passed, torque can not be transmitted between transit joint 17 and central tube III 18, is dallied to protect drilling tool；When torque reduces
When, elastic mechanism II 23 extends, and spherical key 21 is pushed into the spherical keyway of transit joint 17 and central tube III 18, and spherical key passes
It passs structure to re-establish, continues to transmit torque, it is normal to creep into.Therefore, can effectively limit drilling torque using the tool, avoid because
The excessive initiation tool damage of torque and other problems.
It is understood that above with respect to the specific descriptions of the present invention, it is merely to illustrate the present invention and is not limited to this
Technical solution described in inventive embodiments, it will be understood by those of ordinary skill in the art that, still the present invention can be carried out
Modification or equivalent replacement, to reach identical technique effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of underground pressure turns round poising tool, including top connection (1) and fluid cylinder set (2), top connection (1) lower end connects fluid cylinder set
(2)；It is characterized in that：Central tube I (3) is mounted in fluid cylinder set (2), and central tube I (3) upper end is provided with interior with fluid cylinder set (2)
The boss sealed between wall, connection baffle ring I (5), central tube I (3), fluid cylinder set (2) and baffle ring I (5) upper end on central tube I (3)
Upper damping cavity is formed between face, central tube II (11) upper end is sleeved on central tube I (3) lower end outside and can be along central tube I (3)
It moves up and down, elastic mechanism I (9), central tube II (11) mounting is installed between central tube II (11) upper surface and baffle ring I (5)
On fluid cylinder set (2) inner wall step, central tube II (11) can be moved up and down along fluid cylinder set (2) and can be revolved with fluid cylinder set (2)
Turn, forms lower damping cavity between baffle ring I (5) lower face, central tube I (3), fluid cylinder set (2) and central tube II (11) upper surface, under
It is full of filling liquid in damping cavity, the check valve for allowing liquid to flow into upper damping cavity from lower damping cavity is separately installed on baffle ring I (5)
I (6) and permission liquid flow into the check valve II (7) of lower damping cavity from upper damping cavity；
Central tube II (11) lower end connects transit joint (17), and transit joint (17) lower end connects sheath II (29), transit joint
(17) it is sleeved on the outside of central tube III (18) and the installed thrust bearing I (19) between central tube III (18), under sheath II (29)
End cap is provided with the keyway mechanism I with spherical keyway I (32) on the outside of central tube III (18) on central tube III (18) outer wall
(31), transit joint (17) lower end is designed with the keyway mechanism II with spherical keyway II, corresponding spherical shape keyway I (32) and
Sheath I (22), sheath I (22) lower end setting elasticity is arranged in installation spherical key (21) in spherical keyway II, spherical key (21) lower end
Mechanism II (23), connection baffle ring IV (27) on central tube III (18) outer wall are installed between baffle ring IV (27) and sheath II (29) and are pushed away
Power bearing II (28), thrust bearing II (28) are sleeved on central tube III (18), and central tube III (18) lower end connects lower contact
(30)。
2. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：The central tube I (3) upper end boss quilt
Limit is between top connection (1) lower face and fluid cylinder set (2) inner wall step.
3. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：The central tube II (11) and central tube
It is sealed by sealing ring III (12) between I (3), mud-scraping ring I (13) is installed on the inner wall of central tube II (11) upper end.
4. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：The central tube II (11) and fluid cylinder set
(2) it is sealed by sealing ring IV (14) between inner wall, is installed on central tube II (11) outer wall being in contact with fluid cylinder set (2) inner wall
There is mud-scraping ring II (15).
5. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：The central tube II (11) outer wall step
Baffle ring II (16) is set between fluid cylinder set (2) inner wall step.
6. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：It is arranged on fluid cylinder set (2) side wall
The injection hole being connected with lower damping cavity, the injection hole are blocked by closure screw (10).
7. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：The central tube II (11) outer wall and liquid
It is connected using spline between cylinder sleeve (2) inner wall.
8. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：The elastic mechanism I (9) and elastic machine
Structure II (23) is spring.
9. underground pressure described in accordance with the claim 1 turns round poising tool, it is characterised in that：The elastic mechanism II (23) lower end connects
Regulation ring (24) is connect, regulation ring (24) lower end connects adjusting screw (26), and adjusting screw (26) is threaded in baffle ring III (25)
On, baffle ring III (25) is connected on central tube III (18) outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544245.9A CN108798532B (en) | 2018-05-31 | 2018-05-31 | Balance tool is turned round in pressure in pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544245.9A CN108798532B (en) | 2018-05-31 | 2018-05-31 | Balance tool is turned round in pressure in pit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108798532A true CN108798532A (en) | 2018-11-13 |
| CN108798532B CN108798532B (en) | 2020-04-10 |
Family
ID=64089618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810544245.9A Active CN108798532B (en) | 2018-05-31 | 2018-05-31 | Balance tool is turned round in pressure in pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798532B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2020221010A1 (en) * | 2019-04-30 | 2020-11-05 | 中国石油化工股份有限公司 | Reaction torque automatic balancing device for screw drilling tool, and drilling pipe string and method |
| CN112096308A (en) * | 2020-10-20 | 2020-12-18 | 中国石油集团渤海钻探工程有限公司 | Buffer instantaneous pressure reduction short section for PDC drill bit |
| WO2021120720A1 (en) * | 2019-12-16 | 2021-06-24 | 中国石油化工股份有限公司 | Well drilling tool and method for determining parameter thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035792U (en) * | 1988-09-12 | 1989-04-12 | 大庆石油管理局钻井研究所 | Two-way damper for drilling tool |
| CN102678059A (en) * | 2012-05-15 | 2012-09-19 | 中国石油天然气集团公司 | Energy storage protection tool of mechanical drilling tool |
| CN205135465U (en) * | 2015-12-06 | 2016-04-06 | 长江大学 | Weight on bit nipple joint can be regulated and control to nearly drill bit |
| US20170204684A1 (en) * | 2014-07-18 | 2017-07-20 | Siceno S.A.R.L. | Downhole tool |
-
2018
- 2018-05-31 CN CN201810544245.9A patent/CN108798532B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2035792U (en) * | 1988-09-12 | 1989-04-12 | 大庆石油管理局钻井研究所 | Two-way damper for drilling tool |
| CN102678059A (en) * | 2012-05-15 | 2012-09-19 | 中国石油天然气集团公司 | Energy storage protection tool of mechanical drilling tool |
| US20170204684A1 (en) * | 2014-07-18 | 2017-07-20 | Siceno S.A.R.L. | Downhole tool |
| CN205135465U (en) * | 2015-12-06 | 2016-04-06 | 长江大学 | Weight on bit nipple joint can be regulated and control to nearly drill bit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2020221010A1 (en) * | 2019-04-30 | 2020-11-05 | 中国石油化工股份有限公司 | Reaction torque automatic balancing device for screw drilling tool, and drilling pipe string and method |
| US11814944B2 (en) | 2019-04-30 | 2023-11-14 | China Petroleum & Chemical Corporation | Reactive torque automatic balancing device for screw drilling tool, drilling string, and method |
| WO2021120720A1 (en) * | 2019-12-16 | 2021-06-24 | 中国石油化工股份有限公司 | Well drilling tool and method for determining parameter thereof |
| CN112096308A (en) * | 2020-10-20 | 2020-12-18 | 中国石油集团渤海钻探工程有限公司 | Buffer instantaneous pressure reduction short section for PDC drill bit |
| CN112096308B (en) * | 2020-10-20 | 2022-05-13 | 中国石油集团渤海钻探工程有限公司 | Buffer instantaneous pressure reduction short section for PDC drill bit |
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| Publication number | Publication date |
|---|---|
| CN108798532B (en) | 2020-04-10 |
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Effective date of registration: 20200916 Address after: 100120 Beijing Xicheng District six laying Kang Co-patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |
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