CN2145862Y - Sealing spacer - Google Patents
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- Publication number
- CN2145862Y CN2145862Y CN 93202573 CN93202573U CN2145862Y CN 2145862 Y CN2145862 Y CN 2145862Y CN 93202573 CN93202573 CN 93202573 CN 93202573 U CN93202573 U CN 93202573U CN 2145862 Y CN2145862 Y CN 2145862Y
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- CN
- China
- Prior art keywords
- utility
- sealing
- model
- central tube
- tube
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model belongs to a tool for oil and gas well layering technique, which is composed of an upper joint, a balance piston, an unsealing hook, an external central tube, a slip, a locking block, a spacing ring, a rubber tube sealing ring, a lock sleeve, a sitting sealing piston, a lower joint, etc. The utility model can accomplish the actions of hydraulic transmission, sitting sealing, locking and sealing, and a lifting oil tube can be unsealed. The utility model has simple structure and reliable sealing performance and can endure a unidirectional differential pressure of 20MPa. The utility model can be used in multi-stage, and has strong adaptability to the sand outlet well and no damage to a sleeve; the utility model is an ideal tool for the layering technique.
Description
The utility model belongs in the oilfield exploitation procedure, is used for the instrument of oil gas well hierarchical process.
Oil gas well hierarchical process mainly is a mechanical water searching and blocking technology at present, and used packer is mainly used 756-6 type, 251 type packers.Wherein, 756-6 type packer is made up of 21 steel parts, relies on by the retaining mechanism that lock ring, lock tube, lower center tube, snap close refer to, link is formed, and makes packer realize lock sealing.When the needs packing, oil pipe revolves and turn 90 degrees, and makes in the link dog and the axis of the lower center tube straight trough that balances each other corresponding, on carry oil pipe and separate extension, can't realize that in the well section below 1500 meters deblocking moves.Thereby prolonged the job execution time, even caused heavy repair task.251 type packers are a kind of packers that have external slips, and working under oil well for a long time has infringement to sleeve pipe, and working in sand output well occurs the sand card failure easily, and can only single-stage use.
It is a kind of simple in structure harmless to sleeve pipe that this novel purpose provides, and is not prone to sand card phenomenon, and deblocking is reasonable, and it is strong to bear unidirectional pressure reduction ability, and sealing performance is reliable, the packer of rod-pumped well oil production by layer simple in structure.
The utility model by top connection (1), dummy piston (2), deblocking hang (3), inner central tube (6), exterior central tube (7), slips (9), lock dog (10), spacer ring (5), packing element (4), joint ring (8), pinning (11), lock tube (12), set piston (13), lower contact (14) is formed.Slips (9) has the elasticity claw end of pawl button that the gathering sill that balances each other with axis is arranged, the terminal cannelure of groove, and the cross section of groove is trapezoidal, this groove is used to install lock dog, slips is fixed on the certain position of exterior central tube.
Advantage of the present utility model: simple in structure, harmless to sleeve pipe, satisfy oil gas well hierarchical process requirement in the oil-gas field development fully, unidirectional pressure reduction is more than 20MPa, and sealing performance reliably has stronger compliance, and construction technology is simple, and cost is low.
Fig. 1 is a kind of structure chart of packer.
Fig. 2 is the structure chart of slips (9).
Embodiment of the present utility model is: a kind of packer by top connection (1), dummy piston (2), deblocking hang (3), inner central tube (6), exterior central tube (7), slips (9), lock dog (10), spacer ring (5), packing element (4), joint ring (8), pinning (11), lock tube (12), set piston (13), lower contact (14) is formed.Inner central tube (6) one ends and top connection (1) thread connection, the other end passes deblocking successively and hangs (3), exterior central tube (7), seat envelope piston (13) and lower contact thread connection, separates sealing-in (3) and passes the part of dummy piston (2) and top connection (1) thread connection, top connection (1) and be submerged in the dummy piston (2).Top connection (1) and deblocking are hung the sealing of O RunddichtringO between (3), the dummy piston, there are O RunddichtringO and deblocking to hang (3) sealing in the dummy piston (2), and can hang (3) last axis at deblocking slides up and down, the end that exterior central tube (7) external diameter is big overlapped deblocking and hung (3) and dummy piston (2) thread connection, and exterior central tube (7) and deblocking are hung the sealing of O RunddichtringO between (3).The end that the diameter of exterior central tube (7) is little passes packing element (4), joint ring (8) successively, spacer ring (5) is arranged between slips (9), two packing elements, on the certain position of exterior central tube (7) small end square hole and the screwed hole that matches with lock dog (10) arranged, lock dog (10) is housed in the square opening).One half thickness of lock dog is submerged in the exterior central tube, second half cannelure with slips (9) matches, slips is fixed on the certain position of exterior central tube, screwed hole is equipped with pin (11), exterior central tube is fixed on the relevant position of inner central tube (7), prevents this novel deblocking midway owing to bear the effect of pressure at work; One end of lock tube (10) overlapped slips (9) and joint ring (8) thread connection, and the other end contacts with seat envelope piston; The little end of seat envelope piston (13) endoporus has O RunddichtringO and inner central tube (6) fitted seal, the other end pack into lower contact (14) the outside and with the O RunddichtringO fitted seal that connects down (14), this each novel firm part links together closely like this, interacts mutual restriction.When the pressure of inner central tube (6) increases, pressure transmits by the hole of inner central tube and promotes seat envelope piston (13), lock tube (12), joint ring (8), moves compression packing element (4), make packing element (4) expanded radially be full of the annular space of oil, sleeve pipe composition, the annular space of tubing and casing is cut off.After seat envelope piston (13) promotion lock tube (12) moved to certain position, the tooth button of lock tube (12) was meshed with the pawl button of slips (9); Offset the elastic force effect of packing element, reach the purpose of seat envelope.When the needs deblocking, on carry oil pipe, because the effect of packing element (4) and sleeve pipe friction, dummy piston (2), exterior central tube (7), slips (9), lock dog (10), the whole inner central tube (7) relatively of lock tube (12) move down, shear pinning (11), one half thickness of lock dog falls in inner central tube (6) the corresponding annular groove, lock tube (12), the relative exterior central tube (6) of slips (9) move down under the elastic force effect of packing element (4), thereby packing element (4) recovers original free state, realizes the deblocking action.Best seat seal pressure 18～20MPa that this is novel bears more than the single-phase pressure reduction 20MPa maximum working pressure (MWP) 25MPa.
Claims (2)
1, a kind of packer by top connection, dummy piston, deblocking extension, inner central tube, exterior central tube, slips, lock dog, spacer ring, packing element, joint ring, lock tube, set piston, lower contact is formed, it is characterized in that: slips has pawl button claw, end has gathering sill, and the end of groove has cannelure.
2, a kind of packer according to claim 1 is characterized in that: the cannelure cross section of slips is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93202573 CN2145862Y (en) | 1993-02-12 | 1993-02-12 | Sealing spacer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93202573 CN2145862Y (en) | 1993-02-12 | 1993-02-12 | Sealing spacer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2145862Y true CN2145862Y (en) | 1993-11-10 |
Family
ID=33786706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93202573 Expired - Fee Related CN2145862Y (en) | 1993-02-12 | 1993-02-12 | Sealing spacer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2145862Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116137A (en) * | 2010-12-31 | 2011-07-06 | 中国石油天然气集团公司 | Blanking plug for eccentric water distributor |
| CN110067528A (en) * | 2019-04-11 | 2019-07-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of injecting cement in oil well method and single current cementing tool |
-
1993
- 1993-02-12 CN CN 93202573 patent/CN2145862Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116137A (en) * | 2010-12-31 | 2011-07-06 | 中国石油天然气集团公司 | Blanking plug for eccentric water distributor |
| CN110067528A (en) * | 2019-04-11 | 2019-07-30 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of injecting cement in oil well method and single current cementing tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |