CN202039816U - Bidirectional back pressure valve - Google Patents
Bidirectional back pressure valve Download PDFInfo
- Publication number
- CN202039816U CN202039816U CN2011201482925U CN201120148292U CN202039816U CN 202039816 U CN202039816 U CN 202039816U CN 2011201482925 U CN2011201482925 U CN 2011201482925U CN 201120148292 U CN201120148292 U CN 201120148292U CN 202039816 U CN202039816 U CN 202039816U
- Authority
- CN
- China
- Prior art keywords
- valve body
- valve
- spool
- guide pin
- pin bushing
- 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.)
- Expired - Fee Related
Links
- 230000002457 bidirectional effect Effects 0.000 title abstract 4
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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Abstract
The utility model discloses a bidirectional back pressure valve, which comprises a valve body (1), a valve core (4) and a guiding sleeve (6). An upper sealing cone (7) is arranged inside the valve body (1), a lower sealing cone (8) is arranged on the guiding sleeve (6), the valve core (4) is installed in the valve body (1) through a sealing ring (5), the guiding sleeve (6) is connected to the valve body (1) through threads, and the valve core (4) is located inside spaces of the valve body (1) and the guiding sleeve (6). The bidirectional back pressure valve is simple in structure, easy to assemble and convenient to operate, can achieve bidirectional sealing effect through vertical moving of the valve core, reduces cost and time caused by secondary operation, improves working efficiency, can not only maintain a wellhead production tree, but also can check and test whether leakage exists in the production tree.
Description
Technical field
The utility model relates to the production wellhead counterbalance valve, is specifically related to a kind of two-way counterbalance valve.
Background technology
At present, because increasing high-pressure oil-gas well (flowing well) is developed in the raising of oil exploration technology and drilling and production technology, because of exploitation for a long time, (gas) tree of recovering the oil is used for a long time, need complete machine to pull down maintenance, or more renew oil recovery (gas) tree, under the situation of not kill-job, bottom pressure temporarily need be sealed, when the production tree of repairing or new production tree are installed on the well head, utilize this counterbalance valve oppositely to seal, to the production tree pressure testing.
Summary of the invention
The purpose of this utility model is: a kind of two-way counterbalance valve is provided, is used for temporary transient shut-in well, utilize spool to move about with pressure source, it is self-styled to rely on pressure to form, and does not need kill-job, simple to operate.
Technical solution of the present utility model is: this counterbalance valve comprises valve body, spool and guide pin bushing, establish sealing cone in the valve body, set sealing cone on the guide pin bushing, spool is in sealing ring is installed in valve body, guide pin bushing is by on the valve body that is threaded, and spool is positioned at valve body and guide pin bushing space.
During installation, the lower end of valve body is by tubing hanger internal thread in the external screw thread connection well head and use the valve body exterior seal ring to form sealing, the front end of valve body connects guide pin bushing by internal thread and forms sealing by the valve body inner seal ring, the displacement of guide pin bushing restriction spool, the lower seal conical surface of guide pin bushing and spool form sealing during greater than the downforce situation at upward pressure, the last sealing cone of valve body and spool downforce during greater than the upward pressure situation formation seal.
The utility model is simple in structure, handling ease, easy to operate, sealing surface by spool moves up and down, reach the effect of two way seal, reduced cost that secondary operation brought and time, improved operating efficiency, not only can keep in repair the well head production tree, can also whether exist seepage to carry out check test production tree.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1 valve body, 2 valve body exterior seal rings, 3 valve body inner seal rings, 4 spools, 5 sealing rings, 6 guide pin bushings, sealing cone on 7, the 8 lower seal conical surfaces.
The specific embodiment
As shown in Figure 1, this counterbalance valve comprises valve body 1, spool 4 and guide pin bushing 6, establishes sealing cone 7 in the valve body 1, set sealing cone 8 on the guide pin bushing 6, spool 4 is in sealing ring 5 is installed in valve body 1, and guide pin bushing 6 is by on the valve body 1 that is threaded, and spool 4 is positioned at valve body 1 and guide pin bushing 6 spaces.
During installation, the lower end of valve body 1 is by tubing hanger internal thread in the external screw thread connection well head and use valve body exterior seal ring 2 to form sealing, the front end of valve body 1 connects guide pin bushing 6 by internal thread and forms sealing by valve body inner seal ring 3, the displacement of guide pin bushing 6 restriction spools 4, the lower seal conical surface 8 of guide pin bushing 6 and spool 4 form sealing during greater than the downforce situation at upward pressure, and the last sealing cone 7 of valve body 1 and spool 4 form during greater than the upward pressure situation in downforce and seal.
When there is pressure in the shaft bottom, send into two-way counterbalance valve with special tool from production tree master latus rectum, be threaded with tubing hanger, remove instrument, venting production tree internal pressure, counterbalance valve relies on bottom pressure, spool 4 moves up, valve body 17 on sealing surface and spool 4 form sealing, the dismounting production tree; When repairing or after new production tree installs, need to check when whether production tree and well head install seepage, with pressure testing car pump pressure in production tree,, spool 4 is pushed away downwards when pressure during greater than bottom pressure, the lower sealing surface 8 of guide pin bushing 6 forms sealing with spool 4, pressurize checks whether each connecting portion has seepage, after pressure testing is qualified, remove counterbalance valve with special tool, well head production tree operate as normal.
Claims (1)
1. two-way counterbalance valve, it is characterized in that: this counterbalance valve comprises valve body (1), spool (4) and guide pin bushing (6), establish sealing cone (7) in the valve body (1), set sealing cone (8) on the guide pin bushing (6), spool (4) is in sealing ring (5) is installed in valve body (1), guide pin bushing (6) is by on the valve body that is threaded (1), and spool (4) is positioned at valve body (1) and guide pin bushing (6) space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201482925U CN202039816U (en) | 2011-05-11 | 2011-05-11 | Bidirectional back pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201482925U CN202039816U (en) | 2011-05-11 | 2011-05-11 | Bidirectional back pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202039816U true CN202039816U (en) | 2011-11-16 |
Family
ID=44967265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201482925U Expired - Fee Related CN202039816U (en) | 2011-05-11 | 2011-05-11 | Bidirectional back pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202039816U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498645A (en) * | 2013-09-26 | 2014-01-08 | 余金海 | Low shearing adjusting valve |
| CN108361235A (en) * | 2018-04-24 | 2018-08-03 | 山河智能装备股份有限公司 | A kind of compact hydraulic control counterbalance valve and its control method |
-
2011
- 2011-05-11 CN CN2011201482925U patent/CN202039816U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498645A (en) * | 2013-09-26 | 2014-01-08 | 余金海 | Low shearing adjusting valve |
| CN108361235A (en) * | 2018-04-24 | 2018-08-03 | 山河智能装备股份有限公司 | A kind of compact hydraulic control counterbalance valve and its control method |
| CN108361235B (en) * | 2018-04-24 | 2023-09-08 | 山河智能装备股份有限公司 | Compact hydraulic control back pressure valve and control method thereof |
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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: 20111116 Termination date: 20190511 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |