CN201972648U - Upper seal of underbalanced drilling rotating control unit - Google Patents
Upper seal of underbalanced drilling rotating control unit Download PDFInfo
- Publication number
- CN201972648U CN201972648U CN2011200557286U CN201120055728U CN201972648U CN 201972648 U CN201972648 U CN 201972648U CN 2011200557286 U CN2011200557286 U CN 2011200557286U CN 201120055728 U CN201120055728 U CN 201120055728U CN 201972648 U CN201972648 U CN 201972648U
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- China
- Prior art keywords
- oil seal
- last
- seal
- seal body
- mandrel
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses an upper seal of an underbalanced drilling rotating control unit, which is characterized in that O-shaped ring grooves are arranged on the outer circle of an upper oil seal (2), O-shaped rings (1) are mounted in the O-shaped ring grooves, the upper oil seal (2) is connected with an outer shell (10) via twenty-one inner hexagon bolts (8), an upper combined oil seal (4) together with an upper oil seal gasket (3) is mounted in an oil seal groove of the upper oil seal (2) via the upper oil seal gasket (3), an upper oil seal pressing cover (5) is mounted on the upper oil seal (2) via twelve hexagon bolts (7) and simultaneously tightly presses the upper combined oil seal (4), a mandrel (9) penetrates through the upper oil seal (2) from the bottom, an upper seal sleeve (6) penetrates through the centers of the upper combined oil seal (4) and the upper oil seal (2) via threads on the upper portion of the mandrel (9), and sealing is formed between the upper seal sleeve (6) and the upper combined oil seal (4). Problems of motive seal and static seal of the rotating control device are solved by the aid of the upper seal, hermeticality is improved, the service life of the seal is prolonged, drilling efficiency is improved, and drilling cost is reduced.
Description
Technical field
The utility model relates to rotating control assembly, specifically relates to the last seal of the under balance pressure drilling rotating control assembly that uses in a kind of oil under balance pressure drilling.
Background technology
Under-balanced drilling technology is full-fledged at present, and under-balanced drilling technology also obtains approval in the effect of finding and protect aspects such as oil-gas Layer and raising bit speed.Along with petroleum industry develops rapidly, field of oil drilling with the balanced drilling technology as a kind of one preferred technique.
Under balance pressure drilling is exactly in the process of drilling well, and the pressure that the stratum produces in the pit shaft is greater than under the pressure of drilling well circulatory mediator density generation all the time, and band is compressed into capable under-balance drilling operation.During pressure that the pressure that the stratum produces in the pit shaft produces greater than drilling well circulatory mediator density, bottom pressure will push away drilling well circulatory mediator high speed uplink, if well head does not have control device, the blowout phenomenon will take place.In order to address this problem, just need swivel control head to be installed and to finish this process at well head.
Domestic employed swivel control head type mostly be the high price import WILLIAMS and SHAFFER wherein in the majority with WILLIAMS.On the one hand, the high pressure WILLIAMS 7100EP swivel control head assembly 35MPa of anti-static pressure the, dynamic pressure 17 the 5MPa controlled pressure of the balance well of studying intensively at present generally are no more than 5MPa, the maintenance cost of WILLIAMS 7100EP swivel control head is expensive unusually on the other hand, more than 500 ten thousand yuans of one cover rotation control prices, a cover bearing unit repair expense is about 200,000 yuans; Domestic research in this respect occupy the leading position with Sichuan, they developed oneself in, low pressure (3MPa, 7MPa, 10.5MPa) swivel control head product, and use at the scene, but the last seal sealing of this swivel control head is poor, wear extent is big, application life is short, can not satisfy the requirement of drilling technology fully.
Summary of the invention
The purpose of this utility model is: a kind of last seal of under balance pressure drilling rotating control assembly is provided, solves the dynamic and static sealing problem of rotating control assembly, improve sealing, prolong the application life of seal, improve drilling efficiency, reduce drilling cost.
Technical solution of the present utility model is: go up seal and comprise oil seal body, O shape circle, last oil seal gasket, last combination oil seal, last oil sealing cover, upper sleeve gasket and mandrel, on the cylindrical of last oil seal body, establish twice O shape ring recess, O shape circle is installed in the O shape ring recess, last oil seal body links together by 21 hexagon socket head cap screws and shell, in the oil seal groove of last combination oil seal in last oil seal gasket is installed in oil seal body together, last oil sealing cover is installed in the top combination oil seal that compresses simultaneously of oil seal body by 12 hex boltss, mandrel passes oil seal body from the below, upper sleeve gasket passes and seals with last combination oil seal formation in the middle of last combination oil seal and last oil seal body by the screw thread on mandrel top.
Wherein, between the twice O of last oil seal body shape ring recess, be provided with the cool cycles tank, be used to cool off oil seal body and last combination oil seal.
During work, last oil seal body, last combination oil seal, last oil sealing cover and shell are all static, and upper sleeve gasket and mandrel rotate under the driving of drilling rod, form rotary dynamic seal between upper sleeve gasket and the last combination oil seal.
The utlity model has following advantage: 1, the last combination oil seal that is composited by two kinds of materials is out of shape under the effect of working medium pressure with upper sleeve gasket and forms reliable high pressure sealing; 2, between the twice O of last oil seal body shape ring recess, be provided with the cool cycles tank, be used to cool off oil seal body and last combination oil seal, further improve the life-span of going up combination oil seal; 3, simple in structure, good seal performance, long service life is easy to safeguard.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1 O shape circle, oil seal body on 2, oil seal gasket on 3, combination oil seal on 4, oil sealing cover on 5,6 upper sleeve gaskets, 7 hex boltss, 8 hexagon socket head cap screws, 9 mandrels, 10 shells.
The specific embodiment
As shown in Figure 1, last seal comprises oil seal body 2, O shape circle 1, last oil seal gasket 3, last combination oil seal 4, last oil sealing cover 5, upper sleeve gasket 6 and mandrel 9, on the cylindrical of last oil seal body 2, establish twice O shape ring recess, O shape circle 1 is installed in the O shape ring recess, last oil seal body 2 links together by 21 hexagon socket head cap screws 8 and shell 10, in the oil seal groove of last combination oil seal 4 in last oil seal gasket 3 is installed in oil seal body 2 together, last oil sealing cover 5 is installed in the top combination oil seal 4 that compresses simultaneously of oil seal body 2 by 12 hex boltss 7, mandrel 9 passes oil seal body 2 from the below, upper sleeve gasket 6 passes and seals with last combination oil seal 4 formation in the middle of last combination oil seal 4 and last oil seal body 2 by the screw thread on mandrel 9 tops.
Wherein, between the twice O of last oil seal body 2 shape ring recess, be provided with the cool cycles tank, be used to cool off oil seal body 2 and last combination oil seal 4.
During work, last oil seal body 2, last combination oil seal 4, last oil sealing cover 5 and shell 10 are all static, and upper sleeve gasket 6 and mandrel 9 rotate under the driving of drilling rod, form rotary dynamic seal between upper sleeve gasket 6 and the last combination oil seal 4.
Claims (2)
1. the last seal of under balance pressure drilling rotating control assembly, it is characterized in that: go up seal and comprise oil seal body (2), O shape circle (1), last oil seal gasket (3), last combination oil seal (4), last oil sealing cover (5), upper sleeve gasket (6) and mandrel (9), on the cylindrical of last oil seal body (2), establish twice O shape ring recess, O shape circle (1) is installed in the O shape ring recess, last oil seal body (2) links together by 21 hexagon socket head cap screws (8) and shell (10), in the oil seal groove of last combination oil seal (4) in last oil seal gasket (3) is installed in oil seal body (2) together, last oil sealing cover (5) is installed in the top combination oil seal (4) that compresses simultaneously of oil seal body (2) by 12 hex boltss (7), mandrel (9) passes oil seal body (2) from the below, upper sleeve gasket (6) passes and seals with last combination oil seal (4) formation in the middle of last combination oil seal (4) and last oil seal body (2) by the screw thread on mandrel (9) top.
2. the last seal of under balance pressure drilling rotating control assembly according to claim 1, it is characterized in that: wherein, between the twice O shape ring recess of last oil seal body (2), be provided with the cool cycles tank, be used to cool off oil seal body (2) and last combination oil seal (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200557286U CN201972648U (en) | 2011-03-05 | 2011-03-05 | Upper seal of underbalanced drilling rotating control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200557286U CN201972648U (en) | 2011-03-05 | 2011-03-05 | Upper seal of underbalanced drilling rotating control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201972648U true CN201972648U (en) | 2011-09-14 |
Family
ID=44577755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200557286U Expired - Fee Related CN201972648U (en) | 2011-03-05 | 2011-03-05 | Upper seal of underbalanced drilling rotating control unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201972648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196489A (en) * | 2020-09-17 | 2021-01-08 | 中油国家油气钻井装备工程技术研究中心有限公司 | Pressure compensation rotary sealing structure |
-
2011
- 2011-03-05 CN CN2011200557286U patent/CN201972648U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196489A (en) * | 2020-09-17 | 2021-01-08 | 中油国家油气钻井装备工程技术研究中心有限公司 | Pressure compensation rotary sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20130305 |