CN102140893A - Magnetorheological intelligent drilling vibration damper - Google Patents
Magnetorheological intelligent drilling vibration damper Download PDFInfo
- Publication number
- CN102140893A CN102140893A CN201110088663XA CN201110088663A CN102140893A CN 102140893 A CN102140893 A CN 102140893A CN 201110088663X A CN201110088663X A CN 201110088663XA CN 201110088663 A CN201110088663 A CN 201110088663A CN 102140893 A CN102140893 A CN 102140893A
- Authority
- CN
- China
- Prior art keywords
- bearing
- magnetorheological
- torsion
- valve
- coil
- 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.)
- Granted
Links
Images
Landscapes
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a special downhole tool for oil, natural gas and geology drilling, in particular to a magnetorheological intelligent drilling vibration damper. The magnetorheological intelligent drilling vibration damper comprises a turbine generator module, a sensing controller module, a magnetorheological valve, a spring group and a torsion bearing, wherein the turbine generator module, the sensing controller module, the magnetorheological valve, the spring group and the torsion bearing are sequentially connected; the sensing controller module is internally provided with a sensing controller; the magnetorheological valve is internally provided with a coil mandrel; a magnet exciting coil is wound in an annular groove positioned on the a coil mandrel; the coil mandrel, a compensating piston, a coil mandrel lining and a valve sleeve form an upper cavity and a lower cavity together; magnetorheological fluids are sealed in the upper cavity and the lower cavity and flow between the upper cavity and the lower cavity through a damping channel; the torsion bearing is internally provided with a bearing ball raceway; and a bearing ball is arranged in the bearing ball raceway. The invention has the advantages of capability of real-time control, good vibration damping effect, and capabilities of prolonging the service life of the bit and enhancing the drilling speed.
Description
Technical field
The present invention relates to be used for the special downhole tool of oil, natural gas and geological drilling, a kind of magnetorheological intelligent drilling shock absorber.
Background technology
Bore some hard formations of chance through regular meeting in oil, natural gas, the geological drilling process; because shaft bottom injustice, drill teeth intermittently are pressed into rock and rock is intermittently broken, drill string is around the whirling motion at well center, extensional vibration, oscillation crosswise and twisting vibration can take place in drill string.When the extensional vibration frequency of drill bit overlaps with the drilling tool intrinsic frequency, just produce the bouncing of drilling tool phenomenon.Drill bit leaves bottom rock and drives drilling tool and moves upward together during bouncing of drilling tool, and then together from the peak shaft bottom of falling, produces and destroy bigger motional inertia.In addition, drill motor, pumping drilling fluid, factors such as the imbalance of drill string also can produce vibration, and these vibrations will cause the drill string premature failure, damage (tooth, damage of bearings), drilling tool damage (fracture, screw thread get loose) as drill bit, and the initiation engineering accident, even oil well is scrapped; High vibration and impact also can reduce drilling speed, even greatly reduce the contact between drill bit and the bottom rock.
The driller controls drillstring vibrations by change rotating speed, the pressure of the drill, but these measures can not reduce vibration effectively, can reduce drilling efficiency on the contrary.Especially, drill bit designs at a predetermined range of speeds and the pressure of the drill, and the design point drilling well that departs from drill bit will reduce the drill bit functional performance, shortens bit life.
Reduce the drilling well vibration, prevent that the effective measures of bouncing of drilling tool from being mounting dampers between drill bit and drilling tool.Widely used hydraulic buffer in the present drilling engineering, its primary structure is an annular cylinder and an annular piston, be full of hydraulic oil in the oil cylinder, when drill bit extensional vibration, the hydraulic buffer axial load changes, the hydraulic oil of annular in the fluid cylinder is compressed or volume expansion, thereby absorbs or discharge the energy of drill vibration, alleviates or eliminates drilling well vibration and bouncing of drilling tool.
Usually, shock absorber also is to design at a certain specific drilling condition.Use outside these operating modes, the efficient of shock absorber will reduce, in some cases even can increase the vibration of drill string.Magnetorheological intelligent drilling shock absorber can be regulated damping characteristic in real time according to concrete operating mode, and this creeps into significant for efficient, quick, the safety that ensure the deep-well hard formation.Magnetic flow liquid is made of the soft magnetism particulate and the surface-active dispersing agent that are suspended in the non magnetic carrier fluid, and under the externally-applied magnetic field effect, its viscosity can be continuously, fast, reversibly change.Because this controlled flow behavior, magnetic flow liquid can be with good couplant between multi-form formation controller and the actuator.Utilize controlled magneto-rheological vibration damper, advanced sensor-based system and intelligent controller, and, can carry out Based Intelligent Control to the drilling well vibration in conjunction with the frame for movement of DHA, and prolong bit life, improve drilling speed, reduce drilling cost.
Summary of the invention
The objective of the invention is: at the deficiency of existing hydraulic buffer technology, and in order to reduce drill vibration, to prevent bouncing of drilling tool, prolong drilling life of bit, the protection drilling assembly improves rate of penetration, and the spy provides a kind of magnetorheological intelligent drilling shock absorber.
In order to achieve the above object, the present invention solves the technical scheme that this technical problem adopts: a kind of magnetorheological intelligent drilling shock absorber, be made up of turbine generator module, sensing controler module, magnetorheological valve, groups of springs, torsion bearing, its architectural feature is: described turbine generator module, sensing controler module, magnetorheological valve, groups of springs are connected successively with torsion bearing; The turbine generator module is by turbine generator, turbine generator protecting sheathing and set upright joint and constitute; The sensing controler module is made of sensing controler module housing, end bearing, last sliding bearing and sensing controler; Sensing controler is placed in the sensing controler inside modules; Sensing controler module housing top and bottom have been attacked box respectively, and the upper end box connects the turbine generator protecting sheathing, and the lower end box connects valve housing; End bearing and last sliding bearing are processed into cylindrical shape; Magnetorheological valve is made of valve housing, coil axle, compensating piston, piston packing, core neck bush, magnet exciting coil, valve sleeve, sleeve seal circle, valve journal bearing and upper spindle joint; The valve housing upper end connects the sensing controler module housing, and the lower end connects the groups of springs shell, and inside is equipped with the coil axle; Coil axle inside is processed with through hole, and coil axle external surface middle part is equipped with compensating piston, and coil axle external surface bottom is furnished with magnet exciting coil; Adjacent magnet exciting coil twines from opposite direction, and its lead-out wire is drawn from the coil axle, and uses epoxy sealing, constitutes magnetic circuit with coil axle and core neck bush; Compensating piston is a cylindrical structure, and external surface is processed with 3 road annular grooves, is used to install piston packing; Groups of springs is made of groups of springs block, disk spring, groups of springs shell, spring born work arbor, groups of springs sliding bearing and lower spindle joint; Torsion bearing is made of housing joint, torsion bearing shell, bearing ball, properties of journal bearing lubricated, torsion bearing rear, rear sealing ring and torsion bearing axle; There is the bearing ball raceway inside of torsion bearing, and the bearing ball raceway is made of semicircle spiral raceway of torsion bearing inner surface of outer cover and the semicircle spiral raceway cooperation of torsion bearing axle external surface; Box has been attacked at torsion bearing shell two ends; Pin thread has been attacked at torsion bearing axle two ends, and inside is processed with through hole; Bearing ball is placed in the bearing ball raceway, and can rotate flexibly in the bearing ball raceway, transmits the moment of torsion between torsion bearing shell and the torsion bearing axle, and twisting vibration is converted into extensional vibration.
The present invention compared with prior art, the beneficial effect that has is: (1) electromechanical structure is simple, compact, and the shock absorber volume is little, can guarantee bigger stroke, can help valve winding heat radiation again; (2) have stability and durability; (3) can carry out accurate in real time control; (4) continuous, reversible damping force excursion is big.
Description of drawings
Fig. 1 is the structural representation of a kind of magnetorheological intelligent drilling shock absorber of the present invention;
Fig. 2 is that the MR valve door-hinge of a kind of magnetorheological intelligent drilling shock absorber of the present invention is to sectional view;
Fig. 3 is the torsion bearing sectional view of a kind of magnetorheological intelligent drilling shock absorber of the present invention.
Among the figure: 1. turbine generator module, 2. sensing controler module, 3. magnetorheological valve; 4. groups of springs, 5. torsion bearing, 6. turbine generator; 7. the turbine generator protecting sheathing is 8. set upright joint, 9. the sensing controler module housing; 10. end bearing, sliding bearing on 11., 12. sensing controlers; 13. valve housing, 14. coil axles, 15. compensating pistons; 16. piston packing, 17. core neck bushs, 18. magnet exciting coils; 19. the valve sleeve, 20. sleeve seal circles, 21. valve journal bearings; 22. the upper spindle joint, 23. groups of springs blocks, 24. disk springs; 25. the groups of springs shell, 26. spring born work arbors, 27. groups of springs sliding bearings; 28. the lower spindle joint, 29. housing joints, 30. torsion bearing shells; 31. bearing ball, 32. properties of journal bearing lubricated, 33. torsion bearing rears; 34. rear sealing ring; 35. the torsion bearing axle, 36. upper chamber, 37. lower chambers; 38. damp channel, 39. bearing ball raceways.
The specific embodiment
Further specify the specific embodiment of the present invention below in conjunction with accompanying drawing.
According to shown in Figure 1, a kind of magnetorheological intelligent drilling shock absorber of the present invention is made of turbine generator module 1, sensing controler module 2, magnetorheological valve 3, groups of springs 4 and torsion bearing 5; Described turbine generator module 1, sensing controler module 2, magnetorheological valve 3, groups of springs 4 and torsion bearing 5 are connected successively; Turbine generator module 1 is by turbine generator 6, turbine generator protecting sheathing 7 and set upright joint 8 and constitute; Sensing controler module 2 is made of sensing controler module housing 9, end bearing 10, last sliding bearing 11 and sensing controler 12; Sensing controler 12 is placed in sensing controler module 2 inside; Sensing controler module housing 9 top and bottom have been attacked box respectively, and the upper end box connects turbine generator protecting sheathing 7, and the lower end box connects valve housing 13; End bearing 10 and last sliding bearing 11 are processed into cylindrical shape.Groups of springs 4 is made of groups of springs block 23, disk spring 24, groups of springs shell 25, spring born work arbor 26, groups of springs sliding bearing 27 and lower spindle joint 28.
According to Fig. 1, shown in Figure 2, magnetorheological valve 3 is made of valve housing 13, coil axle 14, compensating piston 15, piston packing 16, core neck bush 17, magnet exciting coil 18, valve sleeve 19, sleeve seal circle 20, valve journal bearing 21 and upper spindle joint 22; Valve housing 13 upper ends connect sensing controler module housing 9, and the lower end connects groups of springs shell 25, and inside is equipped with coil axle 14; Coil axle 14 inside are processed with through hole, and coil axle 14 external surfaces middle part is equipped with compensating piston 15, and coil axle 14 external surface bottoms are furnished with magnet exciting coil 18; Adjacent magnet exciting coil 18 twines from opposite direction, and its lead-out wire is drawn from coil axle 14, and uses epoxy sealing, constitutes magnetic circuit with coil axle 14 and core neck bush 17; Compensating piston 15 is a cylindrical structure, and external surface is processed with 3 road annular grooves, is used to install piston packing 16.
According to Fig. 1, shown in Figure 3, torsion bearing 5 is made of housing joint 29, torsion bearing shell 30, bearing ball 31, properties of journal bearing lubricated 32, torsion bearing rear 33, rear sealing ring 34 and torsion bearing axle 35; There is bearing ball raceway 39 inside of torsion bearing 5, and bearing ball raceway 39 is made of semicircle spiral raceway of torsion bearing shell 30 inner surfaces and the semicircle spiral raceway cooperation of torsion bearing axle 35 external surfaces; Box has been attacked at torsion bearing shell 30 two ends; Pin thread has been attacked at torsion bearing axle 35 two ends, and inside is processed with through hole; Bearing ball 31 is placed in the bearing ball raceway 39, and can rotate flexibly in bearing ball raceway 39, transmits the moment of torsion between torsion bearing shell 30 and the torsion bearing axle 35, and twisting vibration is converted into extensional vibration.
In drilling process, turbine generator 6 is driven by drilling fluid and produces alternating current, is transferred to sensing controler 12 and magnet exciting coil 18 after rectification; The displacement to axial that produces owing to vibration between the displacement sensor axle of sensing controler 12 inside and the sensing controler module housing 9, calculate average displacement, least displacement and displacement range after continuous collecting a period of time data, calculate required damping according to average displacement, calculate magnet exciting coil 18 power demands according to required damping again, thereby the size of current in the change coil, change the magnetic field size that coil produces, change the viscosity of magnetic flow liquid, change damping force; The drilling well moment of torsion is delivered to downhole drill bit through turbine generator protecting sheathing 7, sensing controler module housing 9, valve housing 13, groups of springs shell 25, housing joint 29, torsion bearing shell 30, bearing ball 31 and torsion bearing axle 35 from drilling rod, drives drill bit and creeps into; When producing axial vibration, torsion bearing axle 35 drives bearing ball 31 and moves upward along bearing ball raceway 39, disk spring 24 is compressed and slows down vibratory impulse, 26 of spring born work arbors along with torsion bearing axle 35 together, and drive coil axle 14 and move upward, thereby make lower chambers 37 smaller volume, it is big that upper chamber's 36 volumes become, magnetic flow liquid then flows to upper chamber 36 by damp channel 38 from lower chambers 37, produces damping force under the magnetic field effect that coil produces, with vibration attenuation; Torsion bearing 5 can also be converted into axial vibration with twisting vibration simultaneously, makes it further be transmitted, cushion and decay.
Claims (3)
1. magnetorheological intelligent drilling shock absorber, mainly be made of turbine generator module (1), sensing controler module (2), magnetorheological valve (3), groups of springs (4) and torsion bearing (5), it is characterized in that: described turbine generator module (1), sensing controler module (2), magnetorheological valve (3), groups of springs (4) and torsion bearing (5) are connected successively; Sensing controler (12) is installed in the inside of described sensing controler module (6), and sensing controler module housing (9) top and bottom have been attacked box respectively, and the upper end box connects turbine generator protecting sheathing (8), and the lower end box connects valve housing (13).
2. magnetorheological intelligent drilling shock absorber according to claim 1, it is characterized in that: valve housing (13) upper end of magnetorheological valve (3) connects sensing controler module housing (9), the lower end connects groups of springs shell (25), inside is equipped with coil axle (14), coil axle (14) inside is processed with through hole, coil axle (14) external surface middle part is equipped with compensating piston (15), and coil axle (14) external surface bottom is wound with magnet exciting coil (18).
3. magnetorheological intelligent drilling shock absorber according to claim 1, it is characterized in that: there is bearing ball raceway (39) inside of torsion bearing (5), bearing ball raceway (39) is formed by semicircle spiral raceway of torsion bearing shell (30) inner surface and the semicircle spiral raceway cooperation of torsion bearing axle (35) external surface, settle bearing ball (31) in the bearing ball raceway (39), box has been attacked at torsion bearing shell (30) two ends, pin thread has been attacked at torsion bearing axle (35) two ends, and inside is processed with through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110088663 CN102140893B (en) | 2011-04-11 | 2011-04-11 | Magnetorheological intelligent drilling vibration damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110088663 CN102140893B (en) | 2011-04-11 | 2011-04-11 | Magnetorheological intelligent drilling vibration damper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102140893A true CN102140893A (en) | 2011-08-03 |
| CN102140893B CN102140893B (en) | 2013-07-10 |
Family
ID=44408659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110088663 Active CN102140893B (en) | 2011-04-11 | 2011-04-11 | Magnetorheological intelligent drilling vibration damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102140893B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818951A (en) * | 2015-04-29 | 2015-08-05 | 中国海洋石油总公司 | Perforating string bidirectional damping device |
| CN105865941A (en) * | 2016-05-05 | 2016-08-17 | 中国石油集团渤海钻探工程有限公司 | Pushing wing hinge pin shear test tool for intelligent drilling tool |
| CN106837311A (en) * | 2017-02-21 | 2017-06-13 | 中石化石油机械股份有限公司江钻分公司 | A kind of downhole testing device of anti-brake tool |
| CN107489379A (en) * | 2016-06-13 | 2017-12-19 | 瓦瑞尔欧洲联合股份公司 | The rock drilling system of the forced vibration of passive induction |
| CN108678687A (en) * | 2018-06-21 | 2018-10-19 | 中石化石油机械股份有限公司研究院 | Adjustable rigidity drilling well damper |
| US10337252B2 (en) | 2015-05-08 | 2019-07-02 | Halliburton Energy Services, Inc. | Apparatus and method of alleviating spiraling in boreholes |
| CN110273959A (en) * | 2019-07-04 | 2019-09-24 | 西安石油大学 | A kind of controllable magnetic rheology down-hole string vibration suppression device |
| CN110513054A (en) * | 2019-09-21 | 2019-11-29 | 东北石油大学 | A kind of underground damper |
| CN111473834A (en) * | 2020-05-22 | 2020-07-31 | 中国科学院地质与地球物理研究所 | Lubricating oil liquid level detection device of generator in drilling tool |
| CN111485842A (en) * | 2020-06-23 | 2020-08-04 | 东北石油大学 | High-frequency vibration exciter for efficient rock breaking of resonance drilling |
| CN113464101A (en) * | 2021-06-22 | 2021-10-01 | 中国石油化工股份有限公司 | Special magnetic joint for horizontal well clustering perforation pipe string |
| WO2023173201A1 (en) * | 2022-03-17 | 2023-09-21 | Calgary Downhole Tools, Ltd. | System, method and apparatus for downhole torque-transferring ball screw |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4281726A (en) * | 1979-05-14 | 1981-08-04 | Smith International, Inc. | Drill string splined resilient tubular telescopic joint for balanced load drilling of deep holes |
| 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 |
| CN2416225Y (en) * | 2000-03-03 | 2001-01-24 | 大港油田集团钻采工艺研究院 | Shock absorber for hydraulic tandem drilling tool |
| CN2475821Y (en) * | 2001-03-16 | 2002-02-06 | 北京石油机械厂 | A vibration-reducing device for drilling column |
| CN101775962A (en) * | 2010-02-05 | 2010-07-14 | 北京中创欣联合科技发展有限公司 | Active shock absorber for oil drilling |
| CN201561088U (en) * | 2009-11-10 | 2010-08-25 | 上海工程技术大学 | Magnetic flowing deformation torsional vibration damping device |
-
2011
- 2011-04-11 CN CN 201110088663 patent/CN102140893B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4281726A (en) * | 1979-05-14 | 1981-08-04 | Smith International, Inc. | Drill string splined resilient tubular telescopic joint for balanced load drilling of deep holes |
| 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 |
| CN2416225Y (en) * | 2000-03-03 | 2001-01-24 | 大港油田集团钻采工艺研究院 | Shock absorber for hydraulic tandem drilling tool |
| CN2475821Y (en) * | 2001-03-16 | 2002-02-06 | 北京石油机械厂 | A vibration-reducing device for drilling column |
| CN201561088U (en) * | 2009-11-10 | 2010-08-25 | 上海工程技术大学 | Magnetic flowing deformation torsional vibration damping device |
| CN101775962A (en) * | 2010-02-05 | 2010-07-14 | 北京中创欣联合科技发展有限公司 | Active shock absorber for oil drilling |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818951A (en) * | 2015-04-29 | 2015-08-05 | 中国海洋石油总公司 | Perforating string bidirectional damping device |
| US10337252B2 (en) | 2015-05-08 | 2019-07-02 | Halliburton Energy Services, Inc. | Apparatus and method of alleviating spiraling in boreholes |
| CN105865941A (en) * | 2016-05-05 | 2016-08-17 | 中国石油集团渤海钻探工程有限公司 | Pushing wing hinge pin shear test tool for intelligent drilling tool |
| CN107489379A (en) * | 2016-06-13 | 2017-12-19 | 瓦瑞尔欧洲联合股份公司 | The rock drilling system of the forced vibration of passive induction |
| CN106837311B (en) * | 2017-02-21 | 2020-08-11 | 中石化江钻石油机械有限公司 | Downhole testing device for preventing braking tool |
| CN106837311A (en) * | 2017-02-21 | 2017-06-13 | 中石化石油机械股份有限公司江钻分公司 | A kind of downhole testing device of anti-brake tool |
| CN108678687A (en) * | 2018-06-21 | 2018-10-19 | 中石化石油机械股份有限公司研究院 | Adjustable rigidity drilling well damper |
| CN108678687B (en) * | 2018-06-21 | 2020-09-01 | 中石化石油机械股份有限公司研究院 | Rigidity-adjustable drilling shock absorber |
| CN110273959A (en) * | 2019-07-04 | 2019-09-24 | 西安石油大学 | A kind of controllable magnetic rheology down-hole string vibration suppression device |
| CN110513054B (en) * | 2019-09-21 | 2021-03-05 | 东北石油大学 | Underground shock absorber |
| CN110513054A (en) * | 2019-09-21 | 2019-11-29 | 东北石油大学 | A kind of underground damper |
| CN111473834A (en) * | 2020-05-22 | 2020-07-31 | 中国科学院地质与地球物理研究所 | Lubricating oil liquid level detection device of generator in drilling tool |
| CN111473834B (en) * | 2020-05-22 | 2021-04-09 | 中国科学院地质与地球物理研究所 | Lubricating oil liquid level detection device of generator in drilling tool |
| CN111485842A (en) * | 2020-06-23 | 2020-08-04 | 东北石油大学 | High-frequency vibration exciter for efficient rock breaking of resonance drilling |
| CN113464101A (en) * | 2021-06-22 | 2021-10-01 | 中国石油化工股份有限公司 | Special magnetic joint for horizontal well clustering perforation pipe string |
| WO2023173201A1 (en) * | 2022-03-17 | 2023-09-21 | Calgary Downhole Tools, Ltd. | System, method and apparatus for downhole torque-transferring ball screw |
| US11873686B2 (en) | 2022-03-17 | 2024-01-16 | General Downhole Tools, Ltd. | System, method and apparatus for downhole torque-transferring ball screw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102140893B (en) | 2013-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102140893B (en) | Magnetorheological intelligent drilling vibration damper | |
| CN103291214B (en) | Be applicable to the reciprocating hydraulic impacter of hard formation drilling well | |
| CN106639944B (en) | A kind of turbine type downhole hydraulic oscillator | |
| CN105672885B (en) | Turbo-power formula double acting hydraulic oscillation drag reduction drilling tool | |
| CN106917586B (en) | Screw type underground hydraulic oscillator | |
| CN208534403U (en) | A kind of horizontal well impulse hunting drill feeding facility | |
| CN106121513A (en) | A kind of composite impact drilling tool | |
| CN102587832A (en) | Pressure resistant tool for reducing frictional resistance of horizontal well section | |
| CN110374508A (en) | A kind of underbalance pulse oscillation tool | |
| CN106522843B (en) | A kind of drilling well hydro powered oscillator and application method | |
| CN103321569A (en) | Cam type high-frequency percussion well drilling tool | |
| CN101581196A (en) | Impacting helicoid hydraulic motor and transmission shaft assembly | |
| CN102505923B (en) | Shock absorber of drill string | |
| CN108547571A (en) | A kind of centering type torsion impact drilling tool | |
| CN113006682B (en) | Axial impact oscillation screw drill | |
| CN207829811U (en) | Hydraulic blow system | |
| CN112593846B (en) | Axial impact vibration drilling tool with adjustable impact characteristics | |
| CN206707630U (en) | A kind of Well screw hydroscillator | |
| CN107246238B (en) | Integrated impact downhole power drilling tool | |
| RU2467150C2 (en) | Drill string damper | |
| CN204941339U (en) | A kind of anti-brake tool | |
| CN107989547B (en) | Hydraulic impact system | |
| CN106593308A (en) | Near-bit three-dimensional jar | |
| CN202627986U (en) | Movement conversion damping device | |
| CN110374509A (en) | The double pressure chamber helicoid hydraulic motors of drag reduction jar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |