CN106351948A - A undermine sealing and righting thrust bearing system - Google Patents
A undermine sealing and righting thrust bearing system Download PDFInfo
- Publication number
- CN106351948A CN106351948A CN201610753763.2A CN201610753763A CN106351948A CN 106351948 A CN106351948 A CN 106351948A CN 201610753763 A CN201610753763 A CN 201610753763A CN 106351948 A CN106351948 A CN 106351948A
- Authority
- CN
- China
- Prior art keywords
- journal bearing
- bearing
- ring
- housing
- righting
- 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.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/49—Bearings with both balls and rollers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
- F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention disclosed a undermine sealing and righting thrust bearing system which consists of shell and bearing bush. The shell is round and the bearing bush is installed into the shell with both sharing the same central point. Between the shell and the bearing bush, there is upper transverse bearing, thrust bearing and lower transverse bearing. At the top of the upper transverse bearing and the bottom of the lower transverse bearing, the dynamic sealing components are equipped which can bear the load from the axial and the radial directions and achieve the righting purpose, especially under various load changing and complex working conditions undermine. The bearing system is an independent system which can be used jointly with features of simple installation and maintenance.
Description
Technical field
The present invention relates to technical field of bearings is and in particular to a kind of seal righting thrust bearing system for downhole tool.
Background technology
In petroleum geology drilling operation, downhole tool can provide various power, including rotation and axial power.Thus it is real
The purpose of existing broken rock.Therefore, downhole tool can bear axially and radially load, and under most wells, tool work is all adopted simultaneously
With fluid drives, Fluid pressure will certainly be produced and act on formation load on instrument.For ensureing the normal work of instrument and having
Enough working lives, above-mentioned various load are all undertaken by bearing arrangement.So, downhole tool bearing arrangement is very important
Part.
At present, the bearing arrangement of downhole tool is to separately design mode using axially and radially bearing, and great majority are adopted
Use Open architecture.Even if sealing is also using housing and axle integrated sealing structure (as cn104278948).For processing and
Safeguard and all bring certain inconvenience.
Existing structure mainly bears axial load using thrust bearing (angular contact string bearing)；Using rubber and tc sliding axle
Hold and radial direction righting is realized by gap cooperation.Bearing internal external circle is pressed on mandrel and housing using spacer etc. respectively by screw thread
On.Fluid media (medium) is realized a certain degree of lubrication by rational design gap and is cooled down.
Content of the invention
The technical problem to be solved in the present invention is, in view of the foregoing defects the prior art has, there is provided a kind of be used for well
Lower instrument seals righting thrust bearing system, can bear axially and radially load realize centralizing function, be particularly suitable for well
Lower load situation complicated and changeable, bears the load of multiple directions, and this bearing arrangement is relatively independent so that application combination is more many
Sample, the assembling of bearing arrangement is convenient with maintenance.
The present invention be the technical scheme is that by solving above-mentioned technical problem
A kind of downhole tool that is used for seals righting thrust bearing system, and including housing and axle sleeve, housing is cylindrical shape, axle sleeve
It is arranged concentrically in housing, be set with journal bearing, thrust bearing and lower radial bearing between housing and axle sleeve successively, on
The lower surface of the upper surface of journal bearing and lower radial bearing is equipped with moving sealing element.
Connect technique scheme, described upper journal bearing includes journal bearing outer ring, roller and journal bearing inner ring, roller
Axially disposed one or more layers, roller is uniformly distributed between journal bearing outer ring and journal bearing inner ring, outside journal bearing
The outer wall of circle is prepared with the endoporus of housing, and the periphery of the endoporus of journal bearing inner ring and axle sleeve is prepared.
Connect technique scheme, gap, gap are left in the upper end between upper journal bearing outer ring and upper journal bearing inner ring
Inside it is provided with moving sealing element.
Connect technique scheme, lower radial bearing includes journal bearing outer ring, roller and journal bearing inner ring, journal bearing
Outer ring is fixedly connected with the inwall of housing lower end, and journal bearing inner ring is fixedly connected with the outer wall of axle sleeve lower end, and roller uniformly divides
It is distributed in journal bearing outer ring and journal bearing inner ring.
Connect technique scheme, the lower end between journal bearing outer ring and journal bearing inner ring is left gap, set in gap
There is moving sealing element.
Connect technique scheme, moving sealing element includes piston, piston is arranged in journal bearing outer ring and journal bearing
Between circle, the outer wall of the inwall of journal bearing outer ring and journal bearing inner ring constitutes a cylinder body, and piston can move down along along cylinder body
Dynamic, upper and lower for cylinder body space is completely cut off sealing by piston.
Connect technique scheme, piston is set with one or more elastic seal rings vertically successively.
Connect technique scheme, described thrust bearing includes shaft washer, ball and thrust bearing inner ring, ball edge
Axially arranged one or more layers, ball is uniformly distributed between shaft washer and thrust bearing inner ring.
Connect technique scheme, the upper end of housing and axle sleeve is radially arranged with outer locking ring and internal locking ring, external lock successively
Tight ring is connected with housing by screw thread, and internal locking ring is connected with axle sleeve by screw thread, and outer locking ring and internal locking ring are by thrust shaft
Hold and journal bearing axial compression is between housing and axle sleeve.
Connect technique scheme, housing outer surface is evenly distributed with vertical groove.
The method have the advantages that
1st, the bearing group being combined into by thrust bearing and journal bearing, undertake axially and radially load and realize righting make
With, it is to avoid there is axially and radially load that bearing is influenced each other, prevent that thrust bearing from bearing radial load and journal bearing bears
Axial load, the setting sealing of bearing group two ends improves the service life of bearing arrangement, is particularly suitable for underground work, and down-hole is made
In industry, stress load is complicated and changeable, and this bearing arrangement can be good at overcoming this point, bears the load of multiple directions, this bearing
System is relatively independent so that application combination is more diversified, and the assembling of bearing arrangement is convenient with maintenance.
2nd, form injection profit in a seal cavity, seal cavity between the piston of housing upper and lower ends and housing and axle sleeve
Lubricating oil or oils and fatss, when external pressure is excessive, piston moves into seal cavity, and seal cavity is compressed, and makes seal cavity intrinsic pressure
Power increases until piston pressure at both sides reaches balance, and when external pressure is too small, piston moves to outside seal cavity, seal cavity
Increase, so that pressure in seal cavity is reduced until piston pressure at both sides reaches balance, piston type sealing can be realized sealing intracavity
Outer pressure balance, improves the reliability of sealing, realizes dynamic sealing, especially external pressure is changeable in subsurface environment, lives
The pressure balance that plug sealing can effectively make inside and outside seal cavity, with ensure seal pressure differential in rational scope it is ensured that sealing
Reliability.
Brief description
Fig. 1 is to be used for the top view that downhole tool seals righting thrust bearing system in the embodiment of the present invention；
Fig. 2 is the a-a sectional view of Fig. 1；
In figure, 1- outer locking ring, 2- first elastic seal ring, 3- second elastic seal ring, 4- first piston, 5- radial axle
Bearing outer-ring, 6- first roller, 7- housing, 8- first shaft washer, 9- ball, 10- second shaft washer, 11-
Three shaft washers, 12- the 3rd elastic seal ring, 13- second piston, 14- internal locking ring, outside 15- first, 16- first
Cavity, 17- axle sleeve, 18- journal bearing inner ring, 19- the first thrust bearing inner ring, 20- the second thrust bearing inner ring, 21- the 3rd
Thrust bearing inner ring, 22- second cavity, 23- second roller, 24- the 4th elastic seal ring, outside 25- second, 26- oil filler point,
27- plug, 28- groove.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.
With reference to shown in Fig. 1～Fig. 2, in the embodiment that the present invention provides, seal righting thrust shaft for downhole tool
Hold system, including housing 7 and axle sleeve 17, housing 7 is cylindrical shape, and axle sleeve 17 is arranged concentrically in housing 7, in housing 7 and axle sleeve
It is set with journal bearing, thrust bearing and lower radial bearing, the upper surface of upper journal bearing and lower radial axle successively between 17
The lower surface held is equipped with moving sealing element；This bearing arrangement is installed on power transmission shaft alone or in combination, by thrust bearing and
The bearing group that journal bearing is combined into, undertakes axially and radially load realize centralizing function, it is to avoid have axially and radially load
Bearing is influenced each other, prevents thrust bearing from bearing radial load and journal bearing bears axial load, bearing group two ends are arranged
Sealing improves the service life of bearing arrangement, is particularly suitable for underground work, in underground work, stress load is complicated and changeable, this
Bearing arrangement can be good at overcoming this point, bears the load of multiple directions, this bearing arrangement relatively independent so that application group
Close more diversified, the assembling of bearing arrangement is convenient with maintenance.
Further, described upper journal bearing includes journal bearing outer ring 5, roller and journal bearing inner ring 18, roller edge
Axially arranged one or more layers, roller is uniformly distributed between journal bearing outer ring 5 and journal bearing inner ring 18, outside journal bearing
The outer wall of circle 5 is prepared with the endoporus of housing 7, and the periphery of the endoporus of journal bearing inner ring 18 and axle sleeve 17 is prepared.
Further, roller is distributed as 1～2 layer.
Further, gap is left in the upper end between journal bearing outer ring 5 and journal bearing inner ring 18, is provided with dynamic in gap
Potted component.
Further, lower radial bearing includes journal bearing outer ring 5, roller and journal bearing inner ring 18, outside journal bearing
Circle 5 is fixedly connected with the inwall of housing 7 lower end, and journal bearing inner ring 18 is fixedly connected with the outer wall of axle sleeve 17 lower end, and roller is equal
Even it is distributed in journal bearing outer ring 5 and journal bearing inner ring 18.
Further, gap is left in the lower end between journal bearing outer ring 5 and journal bearing inner ring 18, is provided with dynamic in gap
Potted component.
Further, moving sealing element includes piston, piston be arranged at journal bearing outer ring 5 and journal bearing inner ring 18 it
Between, the outer wall of the inwall of journal bearing outer ring 5 and journal bearing inner ring 18 constitutes a cylinder body, and piston can move down along along cylinder body
Dynamic, upper and lower for cylinder body space is completely cut off sealing by piston；Form one between the piston of housing 7 upper and lower ends and housing 7 and axle sleeve 17
Seal cavity, injection lubricating oil or oils and fatss in seal cavity, when external pressure is excessive, piston moves into seal cavity, sealing
Cavity is compressed, and so that pressure in seal cavity is increased until piston pressure at both sides reaches balance, the piston when external pressure is too small
Move to outside seal cavity, seal cavity increases, so that pressure in seal cavity is reduced until piston pressure at both sides reaches balance, live
Plug sealing can realize the pressure balance inside and outside annular seal space, improve the reliability of sealing, realize dynamic sealing, especially in well
In lower environment, external pressure is changeable, and piston type sealing can effectively make the pressure balance inside and outside seal cavity, to ensure sealing pressure
Difference is in rational scope it is ensured that sealing reliability.
Further, described piston is annular piston.
Further, piston is set with one or more elastic seal rings vertically successively.
Further, each piston is arranged with 2 elastic seal rings.
Further, housing 7 top and bottom piston is respectively first piston 4 and second piston 13, and first piston 4 covers
It is provided with the first elastic seal ring 2 and the second elastic seal ring 3, second piston 13 is arranged with the 3rd elastic seal ring 12 and the 4th
Elastic seal ring 24.
Further, described thrust bearing includes shaft washer, ball 9 and thrust bearing inner ring, and ball 9 is vertically
One or more layers is set, and ball 9 is uniformly distributed between shaft washer and thrust bearing inner ring.
Further, ball 9 is scattered in 2～4 layers.
Further, shaft washer includes the first shaft washer 8, the second shaft washer 10 and the 3rd stops
Push shaft bearing outer-ring 11, thrust bearing inner ring includes the first thrust bearing inner ring 19, the second thrust bearing inner ring 20 and the 3rd thrust
Bearing inner race 21, the first shaft washer 8 and the first thrust bearing inner ring 19 are arranged at ball 9 upper end, the 3rd thrust bearing
Outer ring 11 and the 3rd thrust bearing inner ring 21 are arranged at ball 9 lower end, in the second shaft washer 10 and the second thrust bearing
Circle 20 is arranged between two adjacent ball 9.
Further, the roller in the journal bearing above thrust bearing is the first roller 6, the radial direction below thrust bearing
Roller in bearing is the second roller 23.
Further, described potted component is piston type potted component, and piston type potted component includes piston, on housing 7
Form a seal cavity, piston type sealing structure can realize annular seal space between the piston at lower two ends and housing 7 and axle sleeve 17
Inside and outside pressure balance, improves the reliability of sealing, realizes dynamic sealing, especially external pressure is changeable in subsurface environment,
The pressure balance that piston type sealing can effectively make inside and outside seal cavity, with ensure seal pressure differential in rational scope it is ensured that close
Envelope reliability.
Further, the first cavity 16, housing 7 lower end piston are formed between housing 7 upper end piston and upper end journal bearing
Form the second cavity 22 and the journal bearing of lower end between.
Further, housing 7 is provided with oil filler point 26, and oil filler point 26 is arranged between the potted component of housing 7 upper and lower ends,
It is provided with plug 27 in oil filler point 26；Form seal cavity, by note between the potted component of upper and lower ends and housing 7 and axle sleeve 17
Oilhole 26 can fill lubricant medium for the lubrication of bearing into cavity, and plug 27 is used for sealed oil-filling hole 26.
Further, the upper end of housing 7 and axle sleeve 17 is radially arranged with outer locking ring 1 and internal locking ring 14, external lock successively
Tight ring 1 is connected with housing 7 by screw thread, and internal locking ring 14 is connected with axle sleeve 17 by screw thread, outer locking ring 1 and internal locking ring 14
By thrust bearing and journal bearing axial compression between housing 7 and axle sleeve 17；The screw-threaded coupling mode by retaining ring for the end,
Carry out regulation and the axial locking of thrust bearing clearance, outer locking ring 1 and internal locking ring 14 can be respectively to bearing group (thrust bearings
It is combined as bearing group with journal bearing) outer ring and inner ring be adjusted.
Further, outer locking ring 1 by shaft washer and journal bearing outer ring 5 axial compression on housing 7, internal lock
Thrust bearing inner ring and journal bearing inner ring 18 are pressed on axle sleeve 17 tight ring 14.
Further, housing 7 outer surface is evenly distributed with vertical groove 28；Groove 28 can be by bearing arrangement surrounding pressure
Power adjusts approximately equal.
Above be only presently preferred embodiments of the present invention, certainly the interest field of the present invention can not be limited with this,
The equivalence changes therefore made according to scope of the present invention patent, still belong to protection scope of the present invention.
Claims (10)
1. a kind of downhole tool that is used for seals righting thrust bearing system it is characterised in that including housing and axle sleeve, and housing is circle
Tubular, axle sleeve is arranged concentrically in housing, is set with journal bearing, thrust bearing and lower footpath between housing and axle sleeve successively
To bearing, the upper surface of upper journal bearing and the lower surface of lower radial bearing are equipped with moving sealing element.
2. according to claim 1 seal righting thrust bearing system it is characterised in that described upper footpath for downhole tool
Include journal bearing outer ring, roller and journal bearing inner ring to bearing, roller axially disposed one or more layers, roller uniformly divides
It is distributed between journal bearing outer ring and journal bearing inner ring, the endoporus of the outer wall of journal bearing outer ring and housing is prepared, radial axle
The periphery of the endoporus and axle sleeve that hold inner ring is prepared.
3. according to claim 2 seal righting thrust bearing system it is characterised in that journal bearing for downhole tool
Gap is left in upper end between outer ring and journal bearing inner ring, is provided with moving sealing element in gap.
4. according to claim 1 seal righting thrust bearing system it is characterised in that lower radial axle for downhole tool
Contract and include journal bearing outer ring, roller and journal bearing inner ring, journal bearing outer ring is fixedly connected with the inwall of housing lower end, footpath
It is fixedly connected to bearing inner race with the outer wall of axle sleeve lower end, roller is uniformly distributed in journal bearing outer ring and journal bearing inner ring.
5. according to claim 4 seal righting thrust bearing system it is characterised in that journal bearing for downhole tool
Gap is left in lower end between outer ring and journal bearing inner ring, is provided with moving sealing element in gap.
6. seal righting thrust bearing system for downhole tool it is characterised in that dynamic close according to claim 3 or 5
Envelope element include piston, piston is arranged between journal bearing outer ring and journal bearing inner ring, the inwall of journal bearing outer ring and
The outer wall of journal bearing inner ring constitutes a cylinder body, and piston can move up and down along cylinder body, and upper and lower for cylinder body space is completely cut off close by piston
Envelope.
7. seal righting thrust bearing system it is characterised in that piston for downhole tool according to claim 6
It is set with one or more elastic seal rings vertically successively.
8. according to claim 1 seal righting thrust bearing system it is characterised in that described thrust for downhole tool
Bearing includes shaft washer, ball and thrust bearing inner ring, ball axially disposed one or more layers, ball is uniformly distributed
Between shaft washer and thrust bearing inner ring.
9. according to claim 1 seal righting thrust bearing system it is characterised in that housing and axle for downhole tool
The upper end of set is radially arranged with outer locking ring and internal locking ring successively, and outer locking ring is connected with housing by screw thread, internal locking ring
It is connected with axle sleeve by screw thread, outer locking ring and internal locking ring are by thrust bearing and journal bearing axial compression in housing and axle sleeve
Between.
10. according to claim 1 seal righting thrust bearing system it is characterised in that outside housing for downhole tool
Vertical groove is evenly distributed with surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753763.2A CN106351948A (en) | 2016-08-29 | 2016-08-29 | A undermine sealing and righting thrust bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610753763.2A CN106351948A (en) | 2016-08-29 | 2016-08-29 | A undermine sealing and righting thrust bearing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106351948A true CN106351948A (en) | 2017-01-25 |
Family
ID=57857388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610753763.2A Pending CN106351948A (en) | 2016-08-29 | 2016-08-29 | A undermine sealing and righting thrust bearing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106351948A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464547A (en) * | 2021-07-06 | 2021-10-01 | 长江大学 | Axial load transfer device of guiding tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005249189A (en) * | 2004-02-03 | 2005-09-15 | Nsk Ltd | Bearing device for transmission |
| CN201943607U (en) * | 2010-11-10 | 2011-08-24 | 东营市创元石油机械制造有限公司 | Remote-control diameter-variable centralizer for well drilling |
| CN102268962A (en) * | 2011-08-09 | 2011-12-07 | 西南石油大学 | Oil seal screw drilling tool transmission shaft assembly with pressure compensation function |
| CN102296928A (en) * | 2011-09-06 | 2011-12-28 | 西南石油大学 | Transmission shaft assembly of oil sealing cavity pressure balancing spiral drilling rig |
| CN202152631U (en) * | 2011-08-09 | 2012-02-29 | 西南石油大学 | Oil seal screw drilling tool transmission shaft assembly with pressure compensation function |
| CN202227977U (en) * | 2011-09-06 | 2012-05-23 | 西南石油大学 | Transmission shaft assembly of screw drilling tool for balancing pressure of oil seal cavity |
| CN202451049U (en) * | 2012-02-07 | 2012-09-26 | 辽宁金钻工大机械有限公司 | Seal device of transmission shaft of PDM (positive displacement motor) drill |
-
2016
- 2016-08-29 CN CN201610753763.2A patent/CN106351948A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005249189A (en) * | 2004-02-03 | 2005-09-15 | Nsk Ltd | Bearing device for transmission |
| CN201943607U (en) * | 2010-11-10 | 2011-08-24 | 东营市创元石油机械制造有限公司 | Remote-control diameter-variable centralizer for well drilling |
| CN102268962A (en) * | 2011-08-09 | 2011-12-07 | 西南石油大学 | Oil seal screw drilling tool transmission shaft assembly with pressure compensation function |
| CN202152631U (en) * | 2011-08-09 | 2012-02-29 | 西南石油大学 | Oil seal screw drilling tool transmission shaft assembly with pressure compensation function |
| CN102296928A (en) * | 2011-09-06 | 2011-12-28 | 西南石油大学 | Transmission shaft assembly of oil sealing cavity pressure balancing spiral drilling rig |
| CN202227977U (en) * | 2011-09-06 | 2012-05-23 | 西南石油大学 | Transmission shaft assembly of screw drilling tool for balancing pressure of oil seal cavity |
| CN202451049U (en) * | 2012-02-07 | 2012-09-26 | 辽宁金钻工大机械有限公司 | Seal device of transmission shaft of PDM (positive displacement motor) drill |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113464547A (en) * | 2021-07-06 | 2021-10-01 | 长江大学 | Axial load transfer device of guiding tool |
| CN113464547B (en) * | 2021-07-06 | 2022-12-13 | 长江大学 | Axial load transfer device of guiding tool |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180223 Address after: 430223, No. 5, Chinese workers' garden, Temple Hill community, East Lake New Technology Development Zone, Wuhan, Hubei Applicant after: Kingdream Sinopec Petroleum Machinery Co. Ltd. Applicant after: SINOPEC OILFIELD EQUIPMENT CORPORATION Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Applicant before: Sinopec petroleum machinery Limited by Share Ltd Kingdream branch |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170125 |