CN201474667U - Two-way constant pressure valve - Google Patents
Two-way constant pressure valve Download PDFInfo
- Publication number
- CN201474667U CN201474667U CN2009203069677U CN200920306967U CN201474667U CN 201474667 U CN201474667 U CN 201474667U CN 2009203069677 U CN2009203069677 U CN 2009203069677U CN 200920306967 U CN200920306967 U CN 200920306967U CN 201474667 U CN201474667 U CN 201474667U
- Authority
- CN
- China
- Prior art keywords
- reverse circulation
- circulation valve
- valve
- valve seat
- reverse
- 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
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Abstract
The utility model relates to a two-way constant pressure valve, which comprises a shell, valve seats and a valve ball, the reverse circulation valve seat is screwed in the shell, a reverse circulation valve core is a U-shaped body, the lower part of which is open, the outer diameter of the reverse circulation valve core is smaller than the inner diameter of the lower part of the shell, a centering block is arranged on the outer tubular wall, and the lower spherical surface is matched with the upper spherical surface of the reverse circulation valve seat; a limit sleeve is mounted on the lower end surface in the reverse circulation valve core, the outer diameter of the limit sleeve is smaller than the inner diameter of the reverse circulation valve core, the tubular wall is provided with a flow passage, and a forward circulation pressure regulation spring and the valve ball are mounted sequentially from the bottom up in the limit sleeve; the forward circulation valve seat is screwed on the upper end of the reverse circulation valve core; a reverse circulation pressure regulation screw is of an inverted convex structure with a hole, and is screwed in the upper part of the shell, and a reverse circulation pressure regulation spring is mounted between the forward circulation valve seat and the reverse circulation pressure regulation screw. The two-way constant pressure valve can carry out the switching between forward circulation and reverse circulation according to different construction purposes, thus increasing the efficiency of construction and preventing environment pollution and the occurrence of sticking accident.
Description
Technical field
The utility model relates to a kind of two-way constant pressure valve, belongs to oilfield oil well job execution downhole tool technical field.
Background technology
The ball-and-seat that uses on the present oilfield oil well working string, be single ball seat and valve ball, can only realize unidirectional circulation, following, ball seat is last as if valve ball, can only realize direct circulation, in the going down process, the displacement amount is big, simultaneously, under the dark situation of not pouring water in the tubing string of well, be subject to the crowded flat tube post of differential pressure action; Following, valve ball can only be realized anti-circulation last to the ball-and-seat that uses on the working string as if ball seat, in the trip-out process, the tubing string inner fluid releases contaminated environment, influences constructor's health and efficiency of construction, groundwater increment increases simultaneously, and swabbing action is big, easily causes the generation of gas blowout accident.
The utility model content
The purpose of this utility model is to overcome the defective that the ball-and-seat of prior art can only unidirectional circulation, and a kind of positive and negative circulation that realizes is provided, and reduces and pollutes, and improves working conditions, and raises the efficiency, and reduces the two-way constant pressure valve of down-hole accident.
The utility model is made up of housing, valve seat and valve ball, and housing is connected with the reverse circulation valve seat by screw thread, seals by sealing ring therebetween; The reverse circulation valve core is lower openings " U " body, and its external diameter is less than the lower housing portion internal diameter, and outer tube wall is provided with wiper block, and the bottom sphere matches with the top sphere of reverse circulation valve seat; Stop collar is installed on the lower surface of reverse circulation valve in-core, and its external diameter had chute less than reverse circulation valve in-core footpath on the tube wall, direct circulation pressure regulating spring and valve ball are installed in the stop collar from bottom to top successively; The direct circulation valve seat is by being threaded in reverse circulation valve core upper end; The reversing pressure set screw is the inverted "convex" shape structure that has hollow hole, is installed in top in the housing by screw thread, between direct circulation valve seat and reversing pressure set screw the reversing pressure regulating spring is installed.
The utility model can be realized just reverse circulating conversion according to different construction purposes, reduces the number of times that makes a trip, and improves efficiency of construction, simultaneously, by the pressure of regulating spring, but suppression fluid in managing, overflow, avoid the generation of environment pollution and lock of tool drilling.
Description of drawings
Accompanying drawing 1 is two-way constant pressure valve structural representation.
Among the figure: the anti-ball seat that circulates of 1-, 2-sealing ring, 3-reverse circulation valve core, 4-direct circulation pressure regulating spring, 5-direct circulation ball stop collar, the 6-valve ball, 7-direct circulation ball seat, 8-sealing ring, 9-reversing pressure regulating spring, the 10-bearing, 11-reversing pressure set screw, 12-housing, 13-wiper block.
The specific embodiment
By accompanying drawing 1 as can be known, the utility model is connected with reverse circulation valve seat 1 by screw thread by housing 12, therebetween by sealing ring 2 sealings; Reverse circulation valve core 3 is " U " body of lower openings, and its external diameter is less than housing 12 bottom internal diameters, and outer tube wall is provided with wiper block 13, and the bottom sphere matches with the top sphere of reverse circulation valve seat 1; Stop collar 5 is installed on the lower surface in the reverse circulation valve core 3, and its external diameter had chute less than reverse circulation valve core 3 internal diameters on the tube wall, direct circulation pressure regulating spring 4 and valve ball 6 are installed in the stop collar 5 from bottom to top successively; Direct circulation valve seat 7 is by being threaded in reverse circulation valve core 3 upper ends, and by sealing ring 8 sealings; Reversing pressure set screw 11 is for having the inverted "convex" shape structure of hollow hole, is installed in top in the housing 12 by screw thread, between direct circulation valve seat 7 and reversing pressure set screw 11 reversing pressure regulating spring 9 is installed.
During direct circulation, under 9 effects of reversing pressure regulating spring, reverse circulation valve core 3 is sitting on the reverse circulation valve seat 1, reverse circulation valve cuts out, valve ball 6 is at the effect lower compression spring 4 of fluid pressure, valve ball 6 comes downwards on the stop collar 5, fluid in the hollow hole of reversing pressure set screw 11, direct circulation valve seat 7, reverse circulation valve core 3 annular space and the chute of crossing on the tube wall of stop collar 5 enter in the well; Anti-circulation time, under the effect of downhole fluid pressure and direct circulation pressure regulating spring 4, valve ball 6 withstands on the direct circulation valve seat 7, the direct circulation valve cuts out, when reversing pressure during greater than anti-circulation opening pressure, reverse circulation valve core 3 promotes direct circulation valve seat 7 compression reversing pressure regulating springs 9, reverse circulation valve is opened, the formation annulus access of fluid between reverse circulation valve core 3 and housing 12, the hollow hole of reversing pressure set screw 11 returns well head, thereby can be according to different construction purposes, realize just reverse circulating conversion, reduce the number of times that makes a trip, improve efficiency of construction, simultaneously, by the elastic force of regulating spring 9, but suppression fluid in managing, overflow, avoid the generation of environment pollution and lock of tool drilling.
Claims (2)
1. two-way constant pressure valve, form by housing (12), valve seat and valve ball (6), housing (12) is connected with reverse circulation valve seat (1) by screw thread, it is characterized in that: reverse circulation valve core (3) is " U " body of lower openings, its external diameter is less than housing (12) bottom internal diameter, outer tube wall is provided with wiper block (13), and the bottom sphere matches with the top sphere of reverse circulation valve seat (1); Stop collar (5) is installed on the interior lower surface of reverse circulation valve core (3), and its external diameter had chute less than reverse circulation valve core (3) internal diameter on the tube wall, direct circulation pressure regulating spring (4) and valve ball (6) are installed in the stop collar (5) from bottom to top successively; Direct circulation valve seat (7) is by being threaded in reverse circulation valve core (3) upper end; Reversing pressure set screw (11) is for having the inverted "convex" shape structure of hollow hole, be installed in the interior top of housing (12) by screw thread, between direct circulation valve seat (7) and reversing pressure set screw (11), reversing pressure regulating spring (9) be installed.
2. two-way constant pressure valve according to claim 1 is characterized in that: bearing (10) is installed on the lower surface of reversing pressure set screw (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203069677U CN201474667U (en) | 2009-07-28 | 2009-07-28 | Two-way constant pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203069677U CN201474667U (en) | 2009-07-28 | 2009-07-28 | Two-way constant pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474667U true CN201474667U (en) | 2010-05-19 |
Family
ID=42410915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203069677U Expired - Fee Related CN201474667U (en) | 2009-07-28 | 2009-07-28 | Two-way constant pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474667U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650199A (en) * | 2011-02-23 | 2012-08-29 | 新疆华油油气工程有限公司 | Bidirectional pressure control circulating valve |
| CN102808596A (en) * | 2012-08-10 | 2012-12-05 | 中国石油化工股份有限公司 | Downhole constant pressure valve for oil tube |
| CN110566153A (en) * | 2019-09-26 | 2019-12-13 | 中海油能源发展股份有限公司工程技术分公司 | reservoir protection device capable of being opened in two directions |
| CN112112606A (en) * | 2020-09-30 | 2020-12-22 | 中国石油天然气集团有限公司 | Constant-pressure constant-quantity swab and constant-pressure constant-quantity swabbing method thereof |
-
2009
- 2009-07-28 CN CN2009203069677U patent/CN201474667U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102650199A (en) * | 2011-02-23 | 2012-08-29 | 新疆华油油气工程有限公司 | Bidirectional pressure control circulating valve |
| CN102650199B (en) * | 2011-02-23 | 2015-07-15 | 新疆华油油气工程有限公司 | Bidirectional pressure control circulating valve |
| CN102808596A (en) * | 2012-08-10 | 2012-12-05 | 中国石油化工股份有限公司 | Downhole constant pressure valve for oil tube |
| CN102808596B (en) * | 2012-08-10 | 2015-05-20 | 中国石油化工股份有限公司 | Downhole constant pressure valve for oil tube |
| CN110566153A (en) * | 2019-09-26 | 2019-12-13 | 中海油能源发展股份有限公司工程技术分公司 | reservoir protection device capable of being opened in two directions |
| CN112112606A (en) * | 2020-09-30 | 2020-12-22 | 中国石油天然气集团有限公司 | Constant-pressure constant-quantity swab and constant-pressure constant-quantity swabbing method thereof |
| CN112112606B (en) * | 2020-09-30 | 2024-03-01 | 中国石油天然气集团有限公司 | Constant-pressure constant-quantity type swab and constant-pressure constant-quantity swabbing method thereof |
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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: 20100519 Termination date: 20110728 |