CN203035169U - Downhole fixed-type bypass restrictor - Google Patents
Downhole fixed-type bypass restrictor Download PDFInfo
- Publication number
- CN203035169U CN203035169U CN 201220678299 CN201220678299U CN203035169U CN 203035169 U CN203035169 U CN 203035169U CN 201220678299 CN201220678299 CN 201220678299 CN 201220678299 U CN201220678299 U CN 201220678299U CN 203035169 U CN203035169 U CN 203035169U
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- China
- Prior art keywords
- sliding sleeve
- outer tube
- oil nozzle
- tube
- wall
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- Expired - Fee Related
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Abstract
The utility model discloses a downhole fixed-type bypass restrictor, and aims to solve the problems of long well-shutdown pressure balance time, low efficiency, large gas well output loss, high construction cost and the like of the conventional restrictors. Both an outer tube and a central balance sliding sleeve of the restrictor are provided with gas passing holes. A slip is connected above an outer wall shoulder of the outer tube, and a sealing gasket and a lower sealing cartridge are sleeved below the outer wall shoulder. The top end of the outer tube is sleeved into a propelling sleeve and a fish joint. The outer tube is internally provided with the central balance sliding sleeve and a reset spring. A nozzle fixing seat internally provided with a nozzle is connected in a bottom hole of the lower sealing cartridge, and the lower part of the nozzle fixing seat is connected with a sand prevention cylinder internally provided with a nozzle spring and provided with outer wall kerfs. A tensile rod penetrates into the central balance sliding sleeve through the central hole of the fish joint. By using the downhole fixed-type bypass restrictor, downhole security accidents during maintenance and construction can be prevented from happening, the gas well output losses can be reduced, working intensity of workers is reduced, maintenance cost is lowered, and maintenance of the underground restrictor can be efficiently and safely carried out.
Description
Technical field
The utility model relates to a kind of down-hole fixed bypass restriction choke, belongs to oil gas well development technical field.
Background technology
Down-hole fixed restriction choke is widely used in the Development and Production of oil gas well, and it can be realized the pressure of cancelling individual well surface water blind roaster, reducing well head and surface line, the labour intensity that reduces well hilllock administrative staff, reduction production run cost and improve the well automatic management level.But, the present preparation more complicated of restriction choke before maintenance of using, labor strength is big, the closing well equilibrium pressure time is long, inefficiency, and the gas well production loss is big, construction operation cost height, pressure balance can't accurately be judged on the restriction choke, and job safety has a big risk, and is prone to security incident.
Summary of the invention
The purpose of this utility model is to provide a kind of down-hole fixed bypass restriction choke, and it can overcome the existing problem of above-mentioned restriction choke, guarantees that the maintenance work of underground throttle device is carried out efficiently and safely.
Concrete technical scheme of the present utility model is as follows:
The outer tube body of this restriction choke is provided with outer tube air passing hole radially, and the pipe outer wall is provided with shop bolt, convex shoulder top, pipe outer wall middle part connection opening ring, slips spring and slips, convex shoulder below suit sealing mat and lower seal tube; Outer tube top outer wall is sleeved on and advances in cover and the fishing joint; Be provided with center balance sliding sleeve in the outer tube, the sliding sleeve barrel is provided with the sliding sleeve air passing hole corresponding with the outer tube air passing hole, and the sliding sleeve below is provided with back-moving spring; Establish the oil nozzle holder of oil nozzle in connecting in the lower seal tube bottom outlet, establish the oil nozzle spring in oil nozzle holder bottom connects and be provided with the sand control tube of barrel slot; Breaking rod penetrates in the balance sliding sleeve of center through salvaging the joint centre bore.
This down-hole fixed bypass restriction choke can be avoided safeguarding the downhole safety accident takes place in the construction, reduces the gas well production loss, alleviates working strength of workers, reduces maintenance cost, guarantees that the maintenance work of underground throttle device is carried out efficiently and safely.
Description of drawings
Fig. 1 is down-hole fixed bypass restriction choke schematic diagram.
The specific embodiment
With reference to Fig. 1 embodiment of the present utility model is further specified:
Embodiment:
This restriction choke is by breaking rod 1, fishing joint 2, advancing cover 3, shop bolt 4, split ring 5, slips spring 6, slips 7, outer tube 8, center balance sliding sleeve 9, sealing mat 10, lower seal tube 13, back-moving spring 14, oil nozzle holder 15, oil nozzle 16, sand control tube 17 and oil nozzle spring 18 to form:
The course of work of the present utility model is as follows:
This restriction choke is by breaking under excellent 1 lower going-into-well in the seating nipple, slips 7 by split ring 5 and 6 fastenings of slips spring in seating nipple, the annular space of sealing mat 10 sealing restriction chokes and seating nipple makes the down-hole natural gas enter restriction choke top by barrel slot and the oil nozzle 16 of sand control tube 17.Behind the work certain hour, when needing to be serviced or transferring product, generally to pull restriction choke out.When fishing tool drags for fishing joint 2, the center-pole of fisher withstands center balance sliding sleeve 9 and moves down, make sealing mat 10 withdraw from sealing surface, at this moment, four sliding sleeve air passing hole 12 alignings also are communicated with four outer tube air passing holes 11, make a large amount of natural gas via air passing holes enter restriction choke top, reach the purpose of quick equilibrium pressure.
In the time of can't pulling out as restriction choke chance special circumstances, can implement to give up.After giving up, balance sliding sleeve 9 return under the effect of back-moving spring 14 in center seals air passing hole again, makes natural gas enter restriction choke top by barrel slot and the oil nozzle 16 of sand control tube 17 again, reenters sealing and throttle.Shop bolt 4 can prevent from washing away because of air-flow the swing offset of the center balance sliding sleeve 9 that causes, and avoids the air passing hole dislocation, guarantees the pressure balance of restriction choke.
Claims (1)
1. down-hole fixed bypass restriction choke is characterized in that:
The outer tube of this restriction choke (8) body is provided with outer tube air passing hole (11) radially, the pipe outer wall is provided with shop bolt (4), convex shoulder top, pipe outer wall middle part connection opening ring (5), slips spring (6) and slips (7), convex shoulder below suit sealing mat (10) and lower seal tube (13); Outer tube (8) top outer wall is sleeved on and advances in cover (3) and the fishing joint (2); Be provided with center balance sliding sleeve (9) in the outer tube (8), the sliding sleeve barrel is provided with the sliding sleeve air passing hole (12) corresponding with outer tube air passing hole (11), and the sliding sleeve below is provided with back-moving spring (14); Establish the oil nozzle holder (15) of oil nozzle (16) in connecting in lower seal tube (13) bottom outlet, establish oil nozzle spring (18) in oil nozzle holder (15) bottom connects and be provided with the sand control tube (17) of barrel slot; Breaking rod (1) penetrates in the center balance sliding sleeve (9) through salvaging joint (2) centre bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678299 CN203035169U (en) | 2012-12-10 | 2012-12-10 | Downhole fixed-type bypass restrictor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220678299 CN203035169U (en) | 2012-12-10 | 2012-12-10 | Downhole fixed-type bypass restrictor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035169U true CN203035169U (en) | 2013-07-03 |
Family
ID=48687302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220678299 Expired - Fee Related CN203035169U (en) | 2012-12-10 | 2012-12-10 | Downhole fixed-type bypass restrictor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035169U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867167A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Downhole fixed bypass restrictor |
| CN105443087A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Underground restrictor |
-
2012
- 2012-12-10 CN CN 201220678299 patent/CN203035169U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867167A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Downhole fixed bypass restrictor |
| CN103867167B (en) * | 2012-12-10 | 2016-08-10 | 中国石油天然气股份有限公司 | Down-hole fixed pattern bypass throttle device |
| CN105443087A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Underground restrictor |
| CN105443087B (en) * | 2014-08-29 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of underground throttle device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20211210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |