CN115324488A - Impact-resistant underground power drilling tool supporting joint - Google Patents
Impact-resistant underground power drilling tool supporting joint Download PDFInfo
- Publication number
- CN115324488A CN115324488A CN202210946676.4A CN202210946676A CN115324488A CN 115324488 A CN115324488 A CN 115324488A CN 202210946676 A CN202210946676 A CN 202210946676A CN 115324488 A CN115324488 A CN 115324488A
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- Prior art keywords
- ring
- main shaft
- movable
- fixed
- fixed ring
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- 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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- 238000005553 drilling Methods 0.000 title claims abstract description 39
- 239000012530 fluid Substances 0.000 claims abstract description 22
- 230000035939 shock Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/003—Bearing, sealing, lubricating details
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an impact-resistant underground power drilling tool supporting joint which comprises a shell, a main shaft, a fixed bearing, a movable bearing, a damper and a disc spring, wherein the shell is provided with a strip-shaped accommodating cavity; the main shaft is arranged in the accommodating cavity; the fixed bearing is provided with a first movable ring and a first fixed ring; the movable bearing is provided with a second movable ring and a second fixed ring; the damper is provided with a third fixed ring and a third movable ring, the third movable ring is connected with the first movable ring and is arranged in the annular groove in a sliding manner, a second overflowing hole communicated with the annular groove is formed in the third movable ring, and the second overflowing hole is communicated with the accommodating cavity; the disc spring is sleeved on the main shaft, one end of the disc spring is abutted to the second fixed ring, and the other end of the disc spring is abutted to the third fixed ring. The invention has the beneficial effects that: adopt dish spring and attenuator cooperation shock attenuation, the shock attenuation is respond well, cools down each part through drilling fluid simultaneously to the life of device has further been prolonged.
Description
Technical Field
The invention relates to the technical field of drilling tools, in particular to an impact-resistant underground power drilling tool supporting joint.
Background
The support joint is an important component of the underground power drilling tool and mainly plays a role in strengthening the drilling tool, transmitting power to a drill bit, and bearing axial bit pressure, jumping load and radial disturbance. Also referred to in some documents as bearing joints, or transmission assemblies. The structure of the joint mainly comprises a main shaft, a middle shell, a thrust bearing, a centering bearing, a spline shaft, an upper joint and a lower joint and the like. The output characteristic of the underground power drilling tool can be better exerted by matching the supporting joint with the power joint.
In the structure of the support joint of the underground power drilling tool (such as the Chinese utility model patent with the application number of CN 201420632562.3), the bearing adopted by the support joint is a very weak part, and the service life of the bearing seriously restricts the whole service life of the power drilling tool. The service life of the thrust bearing of the common turbine drilling tool is less than 150 hours, the recommended replacement period of the thrust bearing of the screw drilling tool is only 60-80 hours, the service life is short when the deep well is operated, the drill rod needs to be frequently lifted to replace the bearing, a large amount of time is wasted, and the working efficiency is reduced. When the hard geological layer works, the drill bit generates great vibration at the bottom of the well, so that the working condition of the thrust bearing is unstable, the abrasion of the bearing is aggravated, and meanwhile, the thrust bearing has higher temperature due to friction, and the service life is further shortened.
Disclosure of Invention
In view of the above, there is a need for an impact resistant support joint for a downhole power drill, which is used to solve the technical problem of short service life of the conventional support joint for a downhole power drill due to strong vibration and friction temperature rise.
In order to achieve the purpose, the invention provides an impact-resistant underground power drilling tool supporting joint which comprises a shell, a main shaft, a fixed bearing, a movable bearing, a damper and a disc spring, wherein the main shaft is arranged on the shell;
the casing is provided with a strip-shaped accommodating cavity, and drilling fluid is introduced into the accommodating cavity;
the main shaft is arranged in the accommodating cavity and is parallel to the extending direction of the shell;
the fixed bearing is provided with a first movable ring and a first fixed ring, the first movable ring is slidably sleeved on the main shaft, and the first fixed ring is fixed on the shell;
the movable bearing is provided with a second movable ring and a second fixed ring, the second movable ring is fixedly sleeved on the main shaft, and the second fixed ring is connected with the shell in a sliding manner;
the damper is provided with a third fixed ring and a third movable ring, the third fixed ring is arranged in the shell in a sliding mode and provided with an annular groove matched with the third movable ring, the third fixed ring is further provided with a first overflowing hole communicated with the annular groove, the third movable ring is connected with the first movable ring and is arranged in the annular groove in a sliding mode, the third movable ring is provided with a second overflowing hole communicated with the annular groove, and the second overflowing hole is communicated with the accommodating cavity;
the disc spring is sleeved on the main shaft, one end of the disc spring is abutted to the second fixed ring, and the other end of the disc spring is abutted to the third fixed ring.
In some embodiments, the impact-resistant support joint of the downhole power drill further comprises a spline shaft, one end of the spline shaft is fixedly connected with the main shaft, the spline shaft and the main shaft are hollow shafts and are communicated with each other, and the spline shaft is provided with an inflow hole communicated with the accommodating cavity.
In some embodiments, the impact resistant support section of the downhole motor further comprises a fixing sleeve, one end of the fixing sleeve is fixedly connected with the first fixing ring, and the other end of the fixing sleeve is fixedly connected with the housing.
In some embodiments, two ends of the housing are respectively provided with a sealing ring, an inner ring of the sealing ring is connected with the main shaft in a sealing manner, and an outer ring of the sealing ring is connected with the inner wall of the housing in a sealing manner.
In some embodiments, the seal ring is a rolling flood plug seal ring.
In some embodiments, the first rotating ring is slidably sleeved on the main shaft through a first flat key.
In some embodiments, the second rotating ring is fixedly sleeved on the main shaft through a second flat key.
In some embodiments, an upper connector is attached to one end of the housing and a lower connector is attached to the other end of the housing.
In some embodiments, the first stationary ring has a limiting groove, and the third stationary ring has a limiting portion, and the limiting portion is slidably disposed in the limiting groove.
In some embodiments, the movable bearing, the damper and the disc spring are two and are respectively symmetrically arranged on two sides of the fixed bearing.
Compared with the prior art, the technical scheme provided by the invention has the beneficial effects that: when the drill bit touches a rock, an upward impact load is generated, the main shaft moves upwards under the action of the impact load and drives the second movable ring to move upwards, the second movable ring drives the second fixed ring to move upwards, the second fixed ring compresses the disc spring, the disc spring drives the third fixed ring to move upwards when contracting, when the third fixed ring moves upwards, the third movable ring cannot move up and down under the limit of the first movable ring, so the third fixed ring can move upwards relative to the third movable ring, the drilling fluid in the annular groove can be extruded, the impact is relieved, the rigid impact is changed into flexible impact, after the upward impact load is absorbed, the main shaft moves downwards under the action of the self gravity, the drilling fluid pressure and the gravity, and the annular groove can be filled with the drilling fluid at the moment, so that the impact load and the drilling pressure can be absorbed in a circulating and reciprocating mode. The invention adopts the disc spring and the damper to cooperate for shock absorption, has good shock absorption effect, and simultaneously cools each part through the drilling fluid, thereby further prolonging the service life of the device.
Drawings
FIG. 1 is a front view of one embodiment of an impact resistant downhole motor support section provided in accordance with the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along section A-A of FIG. 1;
FIG. 3 is an enlarged partial view of region B of FIG. 2;
FIG. 4 is a schematic perspective view of the downhole motor support of FIG. 2 with the housing omitted;
in the figure: 1-shell, 11-sealing ring, 2-main shaft, 3-fixed bearing, 31-first movable ring, 311-first flat key, 32-first fixed ring, 4-movable bearing, 41-second movable ring, 411-second flat key, 42-second fixed ring, 5-damper, 51-third fixed ring, 511-first overflowing hole, 512-limiting part, 52-third movable ring, 521-second overflowing hole, 53-annular groove, 6-disc spring, 7-spline shaft, 71-inflow hole, 8-fixed cutting sleeve, 91-upper joint and 92-lower joint.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 1-3, the invention provides an impact-resistant support joint for a downhole power drill, comprising a housing 1, a main shaft 2, a fixed bearing 3, a movable bearing 4, a damper 5 and a disc spring 6.
The casing 1 has one and is rectangular shape hold the chamber, it is used for letting in drilling fluid to hold the intracavity. The main shaft 2 is arranged in the accommodating cavity and is parallel to the extending direction of the shell 1.
The fixed bearing 3 has a first movable ring 31 and a first fixed ring 32, the first movable ring 31 is slidably sleeved on the main shaft 2, the first movable ring 31 can slide in the length direction of the main shaft 2 but cannot rotate relative to the main shaft 2, the first fixed ring 32 is fixed to the housing 1, so that when the main shaft 2 rotates, the first movable ring 31 rotates, and the first fixed ring 32 cannot rotate due to being fixed to the housing 1.
The movable bearing 4 has a second movable ring 41 and a second fixed ring 42, the second movable ring 41 is fixedly sleeved on the main shaft 2, the second fixed ring 42 is slidably connected to the housing 1, and the second fixed ring 42 can slide axially relative to the housing 1 but cannot rotate relative to the housing 1, so that when the main shaft 2 rotates, the second movable ring 41 rotates, and the second fixed ring 42 cannot rotate.
The damper 5 includes a third fixed ring 51 and a third movable ring 52, the third fixed ring 51 is slidably disposed in the housing 1 and has an annular groove 53 engaged with the third movable ring 52, the third fixed ring 51 is slidable in the axial direction of the housing 1 but is not rotatable with respect to the housing 1, the third fixed ring 51 further has a first overflowing hole 511 communicating with the annular groove 53, and the third movable ring 52 is connected with the first movable ring 31 and slidably disposed in the annular groove 53.
The disc spring 6 is sleeved on the main shaft 2, one end of the disc spring 6 is abutted against the second fixed ring 42, and the other end of the disc spring 6 is abutted against the third fixed ring 51.
When the drilling fluid containing cavity is used, after the main shaft 2 is connected to the power device, the main shaft 2 rotates, the first movable ring 31 and the second movable ring 41 rotate along with the main shaft 2, the third movable ring 52 rotates along with the first movable ring 31, the first fixed ring 32, the second fixed ring 42 and the third fixed ring 51 cannot rotate, and the drilling fluid flows into the containing cavity; when the drill bit touches a rock, an upward impact load is generated, the main shaft 2 moves upwards under the action of the impact load and drives the second movable ring 41 to move upwards, the second movable ring 41 drives the second fixed ring 42 to move upwards, the second fixed ring 42 compresses the disc spring 6, the disc spring 6 drives the third fixed ring 51 to move upwards when contracting, when the third fixed ring 51 moves upwards, the third movable ring 52 cannot move upwards and downwards due to the limit of the first movable ring 31, therefore, the third fixed ring 51 moves upwards relative to the third movable ring 52, so that the drilling fluid in the annular groove 53 is squeezed out, the impact is relieved, the rigid impact is changed into flexible impact, after the upward impact load is absorbed, the main shaft 2 moves downwards under the action of self gravity, the drilling fluid pressure and the gravity, and the drilling fluid is filled in the annular groove 53 at the moment, so that the impact load and the drilling pressure are absorbed in a circulating and reciprocating manner. Because the disc spring 6 and the damper 5 are matched for damping, the damping effect is good, and meanwhile, each part is cooled through the drilling fluid, so that the service life of the device is further prolonged.
In order to facilitate connection of the power device, referring to fig. 2 and 4, in a preferred embodiment, the shock-resistant support joint of the downhole power drill further includes a spline shaft 7, one end of the spline shaft 7 is fixedly connected with the main shaft 2, the spline shaft 7 and the main shaft 2 are hollow shafts and are communicated with each other, and the spline shaft 7 is provided with an inflow hole 71 communicated with the accommodating cavity, so as to facilitate entry of drilling fluid.
In order to realize the fixed connection between the first retainer ring 32 and the housing 1, referring to fig. 2 and 4, in a preferred embodiment, the impact-resistant support joint of the downhole power drill further includes a fixing clamp sleeve 8, one end of the fixing clamp sleeve 8 is fixedly connected to the first retainer ring 32, and the other end of the fixing clamp sleeve 8 is fixedly connected to the housing 1.
In order to improve the sealing effect, referring to fig. 2, in a preferred embodiment, sealing rings 11 are respectively disposed inside two ends of the housing 1, an inner ring of each sealing ring 11 is connected to the main shaft 2 in a sealing manner, and an outer ring of each sealing ring 11 is connected to an inner wall of the housing 1 in a sealing manner, so that drilling fluid is prevented from leaking out between the housing 1 and the main shaft 2.
In order to improve the use effect, referring to fig. 2, in a preferred embodiment, the sealing ring 11 is a rotating pan plug sealing ring.
In order to realize the connection between the first rotating ring 31 and the main shaft 2, referring to fig. 2, in a preferred embodiment, the first rotating ring 31 is slidably sleeved on the main shaft 2 through a first flat key 311.
In order to realize the connection between the second rotating ring 41 and the spindle 2, referring to fig. 2, in a preferred embodiment, the second rotating ring 41 is fixedly sleeved on the spindle 2 through a second flat key 411.
To facilitate connection to a drill, referring to fig. 1 and 2, in a preferred embodiment, an upper connector 91 is connected to one end of the housing 1, and a lower connector 92 is connected to the other end of the housing 1.
In order to prevent the third fixed ring 51 from rotating relative to the housing 1, referring to fig. 4, in a preferred embodiment, a limiting groove is formed on the first fixed ring 32, a limiting portion 512 is formed on the third fixed ring 51, and the limiting portion 512 is slidably disposed in the limiting groove, so that the third fixed ring 51 cannot rotate relative to the housing 1 under the limiting of the limiting groove.
In order to enhance the using effect, referring to fig. 2 and 4, in a preferred embodiment, the movable bearing 4, the damper 5 and the disc spring 6 are two and are symmetrically arranged on two sides of the fixed bearing 3 respectively.
For a better understanding of the present invention, the operation of the impact resistant support joint of a downhole motor provided by the present invention will be described in detail below with reference to fig. 1-4: when the drilling fluid is used, after the main shaft 2 is connected to the power device, the main shaft 2 rotates, the first movable ring 31 and the second movable ring 41 rotate along with the main shaft 2, the third movable ring 52 rotates along with the first movable ring 31, the first fixed ring 32, the second fixed ring 42 and the third fixed ring 51 cannot rotate, and the drilling fluid flows into the accommodating cavity; when the drill bit touches a rock, an upward impact load is generated, the main shaft 2 moves upwards under the action of the impact load and drives the second movable ring 41 to move upwards, the second movable ring 41 drives the second fixed ring 42 to move upwards, the second fixed ring 42 compresses the disc spring 6, the disc spring 6 drives the third fixed ring 51 to move upwards when contracting, when the third fixed ring 51 moves upwards, the third movable ring 52 cannot move upwards and downwards due to the limit of the first movable ring 31, therefore, the third fixed ring 51 moves upwards relative to the third movable ring 52, so that the drilling fluid in the annular groove 53 is squeezed out, the impact is relieved, the rigid impact is changed into flexible impact, after the upward impact load is absorbed, the main shaft 2 moves downwards under the action of self gravity, the drilling fluid pressure and the gravity, and the drilling fluid is filled in the annular groove 53 at the moment, so that the impact load and the drilling pressure are absorbed in a circulating and reciprocating manner. Because the disc spring 6 and the damper 5 are matched for damping, the damping effect is good, and meanwhile, each part is cooled through the drilling fluid, so that the service life of the device is further prolonged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention will be covered within the scope of the present invention.
Claims (10)
1. An impact-resistant underground power drilling tool supporting joint is characterized by comprising a shell, a main shaft, a fixed bearing, a movable bearing, a damper and a disc spring;
the casing is provided with a strip-shaped accommodating cavity, and drilling fluid is introduced into the accommodating cavity;
the main shaft is arranged in the accommodating cavity and is parallel to the extending direction of the shell;
the fixed bearing is provided with a first movable ring and a first fixed ring, the first movable ring is slidably sleeved on the main shaft, and the first fixed ring is fixed on the shell;
the movable bearing is provided with a second movable ring and a second fixed ring, the second movable ring is fixedly sleeved on the main shaft, and the second fixed ring is connected with the shell in a sliding manner;
the damper is provided with a third fixed ring and a third movable ring, the third fixed ring is arranged in the shell in a sliding mode and provided with an annular groove matched with the third movable ring, the third fixed ring is further provided with a first overflowing hole communicated with the annular groove, the third movable ring is connected with the first movable ring and is arranged in the annular groove in a sliding mode, the third movable ring is provided with a second overflowing hole communicated with the annular groove, and the second overflowing hole is communicated with the accommodating cavity;
the disc spring is sleeved on the main shaft, one end of the disc spring is abutted to the second fixed ring, and the other end of the disc spring is abutted to the third fixed ring.
2. The impact-resistant support joint for a downhole power drill according to claim 1, further comprising a spline shaft, wherein one end of the spline shaft is fixedly connected with the main shaft, the spline shaft and the main shaft are hollow shafts and are communicated with each other, and the spline shaft is provided with an inflow hole communicated with the accommodating cavity.
3. The impact resistant support joint for a downhole motor of claim 1, further comprising a fixing collar, one end of the fixing collar being fixedly connected to the first retaining ring, and the other end of the fixing collar being fixedly connected to the housing.
4. The impact resistant support joint for a downhole motor according to claim 1, wherein a seal ring is disposed inside each of the two ends of the housing, an inner ring of the seal ring is sealingly connected to the main shaft, and an outer ring of the seal ring is sealingly connected to the inner wall of the housing.
5. The impact resistant downhole motor support section according to claim 4, wherein the seal ring is a rotating flood plug seal ring.
6. The impact resistant downhole motor support section of claim 1, wherein the first movable ring is slidably sleeved to the main shaft via a first flat key.
7. The impact resistant downhole motor support section of claim 1, wherein the second rotating ring is fixedly sleeved on the main shaft via a second flat key.
8. The impact resistant downhole motor support section of claim 1, wherein an upper sub is connected to one end of the housing and a lower sub is connected to the other end of the housing.
9. The impact resistant support joint according to claim 1, wherein the first stationary ring defines a retaining groove, the third stationary ring defines a retaining portion, and the retaining portion is slidably disposed in the retaining groove.
10. The impact resistant support joint for a downhole motor of claim 1, wherein the movable bearing, the damper and the disc spring are two and are symmetrically disposed on both sides of the stationary bearing, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210946676.4A CN115324488A (en) | 2022-08-09 | 2022-08-09 | Impact-resistant underground power drilling tool supporting joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210946676.4A CN115324488A (en) | 2022-08-09 | 2022-08-09 | Impact-resistant underground power drilling tool supporting joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115324488A true CN115324488A (en) | 2022-11-11 |
Family
ID=83920977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210946676.4A Pending CN115324488A (en) | 2022-08-09 | 2022-08-09 | Impact-resistant underground power drilling tool supporting joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115324488A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257245A (en) * | 1979-09-13 | 1981-03-24 | Well Control, Inc. | Compression shock absorber device |
| CN101705794A (en) * | 2009-11-27 | 2010-05-12 | 西南石油大学 | Bidirectional anti-fatigue short circuit for drill column |
| CN107401373A (en) * | 2017-07-31 | 2017-11-28 | 西南石油大学 | A kind of turbodrill axial impact loading self-adaptive regulating |
| CN108915583A (en) * | 2018-06-25 | 2018-11-30 | 北京工业大学 | Mechanical composite impact drilling speed tool |
| CA3037025A1 (en) * | 2018-04-27 | 2019-10-27 | China Petroleum & Chemical Corporation | Downhole auxiliary drilling apparatus |
| CN110725649A (en) * | 2019-12-09 | 2020-01-24 | 长江大学 | Push-leaning type rotary guiding tool |
| WO2021050335A1 (en) * | 2019-09-12 | 2021-03-18 | Baker Hughes, A Ge Company, Llc | Dampers for mitigation of downhole tool vibrations |
| US20220195813A1 (en) * | 2020-12-19 | 2022-06-23 | Scientific Drilling International, Inc. | Rotational vibration absorber with tangential dampers cap |
-
2022
- 2022-08-09 CN CN202210946676.4A patent/CN115324488A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4257245A (en) * | 1979-09-13 | 1981-03-24 | Well Control, Inc. | Compression shock absorber device |
| CN101705794A (en) * | 2009-11-27 | 2010-05-12 | 西南石油大学 | Bidirectional anti-fatigue short circuit for drill column |
| CN107401373A (en) * | 2017-07-31 | 2017-11-28 | 西南石油大学 | A kind of turbodrill axial impact loading self-adaptive regulating |
| CA3037025A1 (en) * | 2018-04-27 | 2019-10-27 | China Petroleum & Chemical Corporation | Downhole auxiliary drilling apparatus |
| CN108915583A (en) * | 2018-06-25 | 2018-11-30 | 北京工业大学 | Mechanical composite impact drilling speed tool |
| WO2021050335A1 (en) * | 2019-09-12 | 2021-03-18 | Baker Hughes, A Ge Company, Llc | Dampers for mitigation of downhole tool vibrations |
| CN110725649A (en) * | 2019-12-09 | 2020-01-24 | 长江大学 | Push-leaning type rotary guiding tool |
| US20220195813A1 (en) * | 2020-12-19 | 2022-06-23 | Scientific Drilling International, Inc. | Rotational vibration absorber with tangential dampers cap |
Non-Patent Citations (2)
| Title |
|---|
| 张晓东;朱正喜;: "一种新型井下减速器的研制", 机电产品开发与创新, no. 05, 28 September 2008 (2008-09-28), pages 55 - 57 * |
| 鄢标;: "一种水力振荡器的研制", 内江科技, no. 05, 25 May 2015 (2015-05-25), pages 51 - 52 * |
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