CN104196440B - Sealing-type screw drill transmission shaft assembly - Google Patents
Sealing-type screw drill transmission shaft assembly Download PDFInfo
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- CN104196440B CN104196440B CN201410329683.5A CN201410329683A CN104196440B CN 104196440 B CN104196440 B CN 104196440B CN 201410329683 A CN201410329683 A CN 201410329683A CN 104196440 B CN104196440 B CN 104196440B
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- transmission shaft
- sealing device
- power transmission
- sealing
- bearing
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Abstract
The invention relates to the field of oil drilling and provides a sealing-type screw drill transmission shaft assembly used for a screw drill. The sealing-type screw drill transmission shaft assembly comprises a transmission shaft and a shell arranged outside the transmission shaft in a sleeved mode, the transmission shaft is provided with an axial hole through in the vertical direction, a bearing assembly is arranged in an inner hole of the shell and is connected with the transmission shaft in a sleeved mode, an upper sealing device is arranged on the upper side of the bearing assembly, a lower sealing device is arranged on the lower side of the bearing assembly, and accordingly a sealed bearing cavity is formed. The sealing-type screw drill transmission shaft assembly is characterized in that the upper side of the upper sealing device or the lower side of the lower sealing device is provided with a through pressure balance hole. No pressure difference exists between the upper sealing device and the lower sealing device, and accordingly the sealing performance of the sealed bearing cavity is improved; it can be guaranteed that pressure inside and outside a seal cavity is balanced, and accordingly the bearing cavity can be sealed more reliably; the sealing-type screw drill transmission shaft assembly is simple and compact in structure, reasonable in arrangement and convenient to manufacture.
Description
Technical field
The present invention relates to the closed type screw drill transmission shaft assembly that a kind of oil-drilling field is used with helicoid hydraulic motor.
Background technology
In oil exploitation and well workover, the application of mud motor particularly helicoid hydraulic motor is more and more extensive.Spiral shell
Bar drill tool includes by-pass valve assembly, motor assembly, universal drive shaft and driving-shaft assembly, and various pieces connect respectively from top to bottom successively
Connect, wherein driving-shaft assembly Main Function is the moment of torsion producing motor and rotating speed smoothly passes to drill bit, and undertakes brill
The axial compressive force of head.Driving-shaft assembly is the extremely crucial part of helicoid hydraulic motor, and its structural behaviour is directly connected to helicoid hydraulic motor
Drilling efficiency and service life.
The driving-shaft assembly of helicoid hydraulic motor mainly has open and sealed two kinds of versions at present.Open power transmission shaft
Assembly is using drilling fluid as bearing lubrication and cooling medium.Sealed driving-shaft assembly be in a closed chamber pass through oil or
Grease is as bearing lubrication and cooling medium.At present, sealed driving-shaft assembly mostly adopts sealing and balancing technology in the form of piston,
Namely equipped with piston type upper sealing device above bearing, below bearing, load sealing device, its shortcoming is：Due to drill bit
Nozzle can produce pressure drop, so can produce a pressure drop from piston type upper sealing device to lower sealing device.This pressure drop can push away
Piston formula upper sealing device moves down along axis, leads to lubricating oil constantly to leak from lower sealing device.
Content of the invention
The technical problem to be solved is to provide a kind of sealing property for the deficiency that above-mentioned prior art exists
Good closed type screw drill transmission shaft assembly.
The present invention by solving the problems, such as adopted technical scheme set forth above is：
Including power transmission shaft and the housing being sleeved on outside power transmission shaft, described power transmission shaft offers the axial hole of up/down perforation,
It is installed on bearing assembly in the endoporus of housing to socket-connect with power transmission shaft, be installed on upper sealing device above bearing assembly,
The lower section of bearing assembly is installed on lower sealing device, thus constitutes the bearing bore of sealing it is characterised in that in upper sealing device
The lower section of top or lower sealing device opens up the pressure compensation opening inside and outside break-through.
By such scheme, it is provided with toroidal cavity above shell inner hole upper sealing device, described pressure balance
Break-through housing in hole is inside and outside to be connected with upper toroidal cavity.
By such scheme, between shell inner hole upper end and power transmission shaft, it is provided with leakage-preventing sealing device.
By such scheme, described upper sealing device includes the upper fixing seal sleeve being connected with shell inner hole, upper fixation
The endoporus of seal sleeve is provided with sealing ring and power transmission shaft phase configuration, and described lower sealing device includes being connected with housing lower end
Lower fixing seal sleeve, lower fixing seal hub internal bore is equipped with sealing ring and power transmission shaft phase configuration.
By such scheme, it is radially arranged bearing bore pressure equaliser in upper sealing device, described bearing cavity pressure
Bascule includes opening up toroidal cavity in the periphery of upper fixing seal sleeve, and the inner face perforate of toroidal cavity is connected with bearing bore
Logical, in upper fixing seal sleeve periphery, corresponding toroidal cavity is installed on sealed elastic set, and corresponding sealed elastic on housing
Set opens up radial direction through hole.
By such scheme, the lower section of shell inner hole lower sealing device is provided with lower toroidal cavity, described pressure balance
Break-through power transmission shaft in hole is inside and outside to be connected with lower toroidal cavity.
By such scheme, between shell inner hole lower end and power transmission shaft, it is provided with leakage-preventing sealing device.
By such scheme, described upper sealing device includes the upper rotatory sealing sleeve being connected with power transmission shaft periphery, upper rotation
The periphery turning seal sleeve is provided with sealing ring and shell inner hole phase configuration, described lower sealing device include with power transmission shaft below
Connected lower rotation seal sleeve, the periphery of lower rotation seal sleeve is provided with sealing ring and shell inner hole phase configuration.
By such scheme, it is radially arranged bearing bore pressure equaliser in lower sealing device, described bearing cavity pressure
Bascule includes opening up toroidal cavity in the endoporus of lower rotation seal sleeve, and the inner face perforate of toroidal cavity is connected with bearing bore
Logical, it is installed on sealed elastic set in the corresponding toroidal cavity of lower rotation seal sleeve endoporus, and corresponding sealing bullet on power transmission shaft
Property set opens up radial direction through hole.
By such scheme, described leakage-preventing sealing device is labyrinth-type excluder.
By such scheme, described bearing assembly is rolling bearing assembly, including annular bearing with rolling contact and the thrust axis of rolling
Hold.
The beneficial effects of the present invention is：1st, pass through arrange pressure compensation opening by the annular space above upper sealing device with close
Annular space connection below seal apparatus is got up, and makes the upper toroidal cavity above upper sealing device and the lower annular below lower sealing device
Cavity pressure tends to equal, and no matter drilling hydraulic produced by bit nozzle is reduced to much, upper sealing device and lower sealing device
Between be not subjected to pressure differential, thus strengthening the sealing property of the bearing bore of sealing；2nd, setting bearing bore hydraulicbalance device can
To reduce the pressure differential inside and outside bearing bore, the sealing property of bearing bore is made to be further improved；No matter the gentle drilling fluid of well
The produced lubricating oil of change of pressure（Fat）Volume how to change, all can ensure that the pressure balance inside and outside annular seal space, thus
So that bearing bore is sealed becomes relatively reliable；3rd, pass through setting leakage-preventing sealing device to stop and reduce the leakage of drilling fluid, subtract
The pressure loss of few drilling fluid；4th, present configuration is simply compact, and setting rationally, is easy to make.
Brief description
Fig. 1 is the full sectional view of first embodiment of the invention.
Fig. 2 is the full sectional view of second embodiment of the invention.
Fig. 3 is the amplification view of first embodiment of the invention device for preventing leakage and upper sealing device.
Fig. 4 is the amplification view of first embodiment of the invention lower sealing device.
Fig. 5 is the amplification view of second embodiment of the invention device for preventing leakage and lower sealing device.
Fig. 6 is the amplification view of second embodiment of the invention upper sealing device.
Specific embodiment
Further illustrate embodiments of the invention below in conjunction with accompanying drawing.
The first of the present invention is implemented shown in such as Fig. 1,3,4, including power transmission shaft 1 and the housing 9 being sleeved on outside power transmission shaft,
Described power transmission shaft offers the axial hole of up/down perforation, is installed on bearing assembly in the endoporus of housing and socket-connects with power transmission shaft,
Described bearing assembly is rolling bearing assembly, and including annular bearing with rolling contact 7 and thrust bearing 8, thrust bearing is pacified
It is located at middle part, annular bearing with rolling contact is installed in two of thrust bearing.It is installed on sealing dress above bearing assembly
Put, be installed on lower sealing device in the lower section of bearing assembly, thus constitute the bearing bore of sealing.Described upper sealing device includes
The upper fixing seal sleeve 5 being connected with shell inner hole, the endoporus of upper fixing seal sleeve is provided with sealing ring and is matched with power transmission shaft
Put, described lower sealing device includes the lower fixing seal sleeve 11 being connected with housing lower end, lower fixing seal hub internal bore is put
There are sealing ring and power transmission shaft phase configuration.It is provided with toroidal cavity 4 above shell inner hole upper sealing device, in upper sealing dress
The top put opens up the pressure compensation opening 3 inside and outside break-through housing, and pressure balance in the hole is installed on filter screen, pressure compensation opening break-through shell
Inside and outside is connected with upper toroidal cavity.Pressure compensation opening open up the lower annular making upper toroidal cavity 4 and housing outer lower end
The pressure of cavity 12 tends to equal.It is provided with leakage-preventing sealing device 2 between shell inner hole upper end and power transmission shaft, described is anti-
Leakage sealed device is labyrinth-type excluder.It is radially arranged bearing bore pressure equaliser in upper sealing device, described
Bearing bore pressure equaliser includes opening up toroidal cavity 13, the inner face perforate of toroidal cavity in the periphery of upper fixing seal sleeve
It is connected with bearing bore, be installed on sealed elastic set 6 in the corresponding toroidal cavity in upper fixing seal sleeve periphery, sealed elastic set
Upper and lower side endoporus is provided with the annular slot phase configuration of flange and upper fixing seal sleeve periphery, corresponding sealed elastic on housing
Set opens up radial direction through hole.Additionally, the oil filler point 10 being connected with sealed bearings chamber is additionally provided with housing, by oil filler point to
Lubricating oil is filled in bearing bore（Fat）So that bearing group is in the lubricating oil of a sealing（Fat）In environment.
Implement shown in such as Fig. 2,5,6 for second, be described upper sealing dress with the difference of a upper embodiment
Put including the upper rotatory sealing sleeve 14 being connected with power transmission shaft periphery, the periphery of upper rotatory sealing sleeve is provided with sealing ring and shell
Internal hole phase configuration, forms dynamic sealing, and the endoporus of upper rotatory sealing sleeve also can be installed sealing ring and be socketed with drive shaft seal；Institute
The lower sealing device stated include with power transmission shaft below socket lower rotation seal sleeve 15, lower rotation seal sleeve periphery setting
There are sealing ring and shell inner hole phase configuration, form dynamic sealing.The lower section of shell inner hole lower sealing device is provided with lower annular empty
Chamber 12A, opens up the pressure compensation opening 3 inside and outside break-through power transmission shaft in the lower section of lower sealing device, described pressure compensation opening break-through
Power transmission shaft is inside and outside to be connected with lower toroidal cavity.Pressure compensation opening open up so that upper toroidal cavity 4A and lower toroidal cavity 12A
Pressure tend to equal.It is installed on swivel nut in shell inner hole lower end, between swivel nut and power transmission shaft, be provided with leakage-preventing sealing device
2, described leakage-preventing sealing device is labyrinth-type excluder.Fill in the bearing bore pressure balance that is radially arranged of lower sealing device
Put, described bearing bore pressure equaliser includes opening up toroidal cavity 13, toroidal cavity in the endoporus of lower rotation seal sleeve
Inner face perforate be connected with bearing bore, be installed on sealed elastic set 6 in the corresponding toroidal cavity of lower rotation seal sleeve endoporus, close
The upper and lower side periphery of envelope resilient sleeve is provided with the annular slot phase configuration of flange and lower rotation seal sleeve endoporus, and in transmission
On axle, corresponding sealed elastic set opens up the radial direction through hole with axially extending bore phase break-through.
Claims (6)
1. a kind of closed type screw drill transmission shaft assembly, including power transmission shaft and the housing that is sleeved on outside power transmission shaft, described biography
Moving axis offers the axial hole of up/down perforation, is installed on bearing assembly in the endoporus of housing and socket-connects with power transmission shaft, in bearing group
The top of part is installed on upper sealing device, is installed on lower sealing device in the lower section of bearing assembly, thus constitutes the bearing of sealing
Chamber is it is characterised in that open up the pressure compensation opening inside and outside break-through above upper sealing device；In shell inner hole upper sealing device
Top be provided with toroidal cavity, described pressure compensation opening break-through housing is inside and outside to be connected with upper toroidal cavity；In housing
It is provided with leakage-preventing sealing device between endoporus upper end and power transmission shaft；Described upper sealing device includes being connected with shell inner hole
Upper fixing seal sleeve, the endoporus of upper fixing seal sleeve is provided with sealing ring and power transmission shaft phase configuration, and described lower sealing fills
Put including the lower fixing seal sleeve being connected with housing lower end, lower fixing seal hub internal bore is equipped with sealing ring and is matched with power transmission shaft
Put；It is radially arranged bearing bore pressure equaliser in upper sealing device, described bearing bore pressure equaliser is included upper
The periphery of fixing seal sleeve opens up toroidal cavity, and the inner face perforate of toroidal cavity is connected with bearing bore, in upper fixing seal
The corresponding toroidal cavity in sleeve periphery is installed on sealed elastic set, and corresponding sealed elastic set opens up radial direction through hole on housing.
2. the closed type screw drill transmission shaft assembly as described in claim 1 is it is characterised in that it is characterized in that described is anti-
Leakage sealed device is labyrinth-type excluder.
3. a kind of closed type screw drill transmission shaft assembly, including power transmission shaft and the housing that is sleeved on outside power transmission shaft, described biography
Moving axis offers the axial hole of up/down perforation, is installed on bearing assembly in the endoporus of housing and socket-connects with power transmission shaft, in bearing group
The top of part is installed on upper sealing device, is installed on lower sealing device in the lower section of bearing assembly, thus constitutes the bearing of sealing
Chamber it is characterised in that open up the pressure compensation opening inside and outside break-through in the lower section of lower sealing device；In shell inner hole lower sealing device
Lower section be provided with lower toroidal cavity, described pressure compensation opening break-through power transmission shaft is inside and outside to be connected with lower toroidal cavity；Under
Sealing device be radially arranged bearing bore pressure equaliser, described bearing bore pressure equaliser is included in lower rotatory sealing
The endoporus of sleeve opens up toroidal cavity, and the inner face perforate of toroidal cavity is connected with bearing bore, in lower rotation seal sleeve endoporus
Corresponding toroidal cavity is installed on sealed elastic set, and corresponding sealed elastic set opens up radial direction through hole on power transmission shaft.
4. the closed type screw drill transmission shaft assembly as described in claim 3 is it is characterised in that in shell inner hole lower end and biography
It is provided with leakage-preventing sealing device between moving axis.
5. the closed type screw drill transmission shaft assembly as described in claim 3 is it is characterised in that described upper sealing device bag
Include the upper rotatory sealing sleeve being connected with power transmission shaft periphery, the periphery of upper rotatory sealing sleeve is provided with sealing ring and shell inner hole
Phase configuration, described lower sealing device includes and the lower rotation seal sleeve being connected below power transmission shaft, lower rotation seal sleeve
Periphery is provided with sealing ring and shell inner hole phase configuration.
6. the closed type screw drill transmission shaft assembly as described in claim 4 is it is characterised in that it is characterized in that described is anti-
Leakage sealed device is labyrinth-type excluder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329683.5A CN104196440B (en) | 2014-07-11 | 2014-07-11 | Sealing-type screw drill transmission shaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329683.5A CN104196440B (en) | 2014-07-11 | 2014-07-11 | Sealing-type screw drill transmission shaft assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104196440A CN104196440A (en) | 2014-12-10 |
| CN104196440B true CN104196440B (en) | 2017-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410329683.5A Active CN104196440B (en) | 2014-07-11 | 2014-07-11 | Sealing-type screw drill transmission shaft assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104196440B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631007B (en) * | 2017-09-04 | 2020-02-21 | 西南石油大学 | Novel screw drill sealing transmission shaft assembly |
| CN112459729B (en) * | 2021-01-25 | 2021-06-11 | 胜利油田东方实业投资集团有限责任公司 | Oil field screw drilling tool with heat dissipation function |
| CN113107353B (en) * | 2021-04-12 | 2023-06-16 | 长江大学 | Heavy-load antifriction type sealing transmission shaft assembly |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4329127A (en) * | 1977-07-25 | 1982-05-11 | Smith International, Inc. | Sealed bearing means for in hole motors |
| CN2110709U (en) * | 1990-11-15 | 1992-07-22 | 大港石油管理局钻采工艺研究院 | Sealing device in transmission shaft of power drilling tool |
| CN2510613Y (en) * | 2001-09-27 | 2002-09-11 | 大港油田集团中成机械制造有限公司 | Screw-arbor drill driving-shaft assembly |
| CN2510674Y (en) * | 2001-10-19 | 2002-09-11 | 大港油田集团有限责任公司 | Screw drilling tool drive shaft sealing device |
| CN2551754Y (en) * | 2002-06-03 | 2003-05-21 | 石油大学(北京) | Oil storage compensation rubber closed drive shaft with thrust conic roll bearing |
| CN201358724Y (en) * | 2008-12-11 | 2009-12-09 | 天津立林石油机械有限公司 | Automatic pressure-regulating oil seal driving shaft assembly |
| CN201588534U (en) * | 2009-12-16 | 2010-09-22 | 潍坊盛德石油机械制造有限公司 | Sealing transmission shaft for screw drilling tool |
| 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 |
| CN202500491U (en) * | 2012-02-09 | 2012-10-24 | 东营锐旭石油技术有限公司 | Closable screw drilling tool transmission shaft |
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2014
- 2014-07-11 CN CN201410329683.5A patent/CN104196440B/en active Active
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| CN104196440A (en) | 2014-12-10 |
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Effective date of registration: 20180316 Address after: 430223, No. 5, Chinese workers' garden, Temple Hill community, East Lake New Technology Development Zone, Wuhan, Hubei Co-patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Patentee after: Kingdream Sinopec Petroleum Machinery Co. Ltd. Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: Jianghan Petroleum Drilling Bit Co., Ltd. |