CN201306152Y - Pressure-balancing pressure-testing valve - Google Patents
Pressure-balancing pressure-testing valve Download PDFInfo
- Publication number
- CN201306152Y CN201306152Y CNU2008202249004U CN200820224900U CN201306152Y CN 201306152 Y CN201306152 Y CN 201306152Y CN U2008202249004 U CNU2008202249004 U CN U2008202249004U CN 200820224900 U CN200820224900 U CN 200820224900U CN 201306152 Y CN201306152 Y CN 201306152Y
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- China
- Prior art keywords
- pressure
- oil pipe
- main body
- valve
- mud
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- 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 pressure-balancing pressure-testing valve. A valve seat is fixed in a main body by constant-pressure shear pins; a valve ball seat is arranged on the valve seat; a spring is assembled on a valve ball; a valve bonnet is arranged upon the spring, and is screwed in the main body to preload the spring and fix the valve bonnet; the main body is provided with a through hole; and the lower part of the main body is provided with a pocket. The main body is screwed in the upper part of an oil pipe, and a circular channel is arranged between the lower part of the main body and the oil pipe. The upper part of the main body is an internal oil pipe thread. After the pressure of the lower part of the valve ball is higher than a certain value, the valve ball can be opened to balance pressure, so that the mud-displacing oil pipe cannot be squeezed and deformed. If the pressure is unstable during pressure testing, the mud-displacing oil pipe needs to be lifted out. If the pressure is stable and does not decrease during pressure testing, the operation of mud displacement can be carried out, the constant-pressure shear pins are sheared off, the mud-displacing oil pipe passes through the through hole and the circular channel to be communicated with the lower part, mud-displacing fluid is injected through the mud-displacing oil pipe, so that the mud in a well can be displaced out from a sleeve, and thereby, the mud-displacing operation in the oil well can be fulfilled smoothly.
Description
One, technical field
The utility model belongs to the underground equipment that oil well repairing operation is used, particularly a kind of pressure balance pressure testing valve.
Two, background technology
In the oil-water well well workover, often need replace the slurry operation, carry out this operation and be with under the slurry oil pipe in well, in oil pipe, squeeze into for slurries, mud is returned out from oil casing annular space.Behind slurry oil pipe G.I.H, volume for the slurry oil pipe can be extruded mud, make mud from returning out to well head for starching in oil pipe and the sleeve pipe, cause environment pollution, also bring inconvenience in the construction,, generally one way valve is being installed for slurry oil pipe bottom for fear of the generation of this problem to operating worker, the interior mud of well can not be entered in the slurry oil pipe, mud is discharged through pipeline from sleeve pipe, for not discharging mud in the slurry oil pipe, can avoid environment pollution, the operating worker easy construction, but, after being lowered to degree of depth increase, increase for slurry oil-pipe external wall pressure for being empty in the slurry oil pipe, cause for the crimp of slurry oil pipe quilt, can not finish for the slurry operation.After one way valve being installed, do not have replacing the pressure testing of slurry oil pipe for slurry oil pipe bottom yet, (because one way valve can not make fluid enter, but can flow out), it is on-the-spot that what use is pressure testing oil pipe not for the slurry oil pipe, there are some defective for slurry oil pipe also G.I.H together, cause and can not replace mud, also be not easy to find leakage place for the slurry oil pipe.
Three, summary of the invention
Whether the purpose of this utility model is a kind of pressure balance pressure testing valve of design, and its mud can not prevented the pollution of the environment from for spraying in the slurry oil pipe, can make for starching place's pressure balance in the oil pipe, also can verify for the slurry oil pipe and miss for the pressure testing of slurry oil pipe.
The purpose of this utility model is achieved in that valve seat is fixed in the main body by the level pressure shear pin, the valve ball seat is on valve seat, spring is installed on the valve ball, it on the spring valve bonnet, the external screw thread of valve bonnet and body interior minor thread link, play preloading spring and standing valve cover, linked hole is arranged on the main body, lower body part has pocket.
Oil pipe top connects with the external screw thread of main body, between lower body part and the oil pipe circular passage is arranged.
Described main body top is the oil pipe internal thread.
The beneficial effects of the utility model are: after valve ball bottom pressure was higher than certain value, valve ball can be opened equilibrium pressure, can not be extruded distortion for the slurry oil pipe.Can guarantee that oil well replaces the slurry operation to finish smoothly to its top for the pressure testing of slurry oil pipe.
Four, description of drawings
Accompanying drawing is a general assembly drawing of the present utility model.
Five, the specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described.
After valve ball 4 bottom pressure were higher than certain value, valve ball 4 can be opened equilibrium pressure, can not be extruded distortion for the slurry oil pipe.Valve ball 4 above oil pipes are airtight, can be to its pressure testing, whether checking qualified for the slurry oil pipe, if pressure instability during pressure testing illustrate for the leakage of slurry oil pipe, need to propose for starching oil pipe.The place of liquid level is arranged in mentioning for the slurry oil pipe, and near several oil pipes that scrutiny is herein just can be found out the leakage oil pipe, need not check all oil pipes that propose, and therefore can check flowline leakage position simply accurately.The following oil pipe of liquid level is qualified oil pipe, can continue to use, and needn't propose ground.
If pressure raises and does not stablely fall during pressure testing, it is qualified to illustrate for the slurry oil pipe, can replace the slurry operation, earlier raise pressure this moment, level pressure shear pin 6 is cut off, and valve ball 4, valve seat 5 drop on 9 li in the pocket of mouth of main body 1, on the utility model for the slurry oil pipe through linked hole 8, circular passage 10 and bottom UNICOM, from for squeezing into for slurries in the slurry oil pipe, just mud in the well can be replaced out from sleeve pipe.
Claims (3)
1, a kind of pressure balance pressure testing valve, it is characterized in that: valve seat (5) is fixed in the main body (1) by level pressure shear pin (6), valve ball (4) seat is on valve seat (5), spring (3) is installed on the valve ball (4), be valve bonnet (2) on the spring (3), the external screw thread of valve bonnet (2) and the inner minor thread of main body (1) link, and play preloading spring (3) and standing valve cover (2), linked hole (8) is arranged on the main body (1), and pocket (9) is arranged at main body (1) bottom.
2, pressure balance pressure testing valve according to claim 1 is characterized in that: oil pipe (7) top connects with the external screw thread of main body (1), between main body (1) bottom and the oil pipe (7) circular passage (10) is arranged.
3, pressure balance pressure testing valve according to claim 1 is characterized in that: described main body (1) top is the oil pipe internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202249004U CN201306152Y (en) | 2008-12-03 | 2008-12-03 | Pressure-balancing pressure-testing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202249004U CN201306152Y (en) | 2008-12-03 | 2008-12-03 | Pressure-balancing pressure-testing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201306152Y true CN201306152Y (en) | 2009-09-09 |
Family
ID=41098619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202249004U Expired - Fee Related CN201306152Y (en) | 2008-12-03 | 2008-12-03 | Pressure-balancing pressure-testing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201306152Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443285A (en) * | 2019-09-02 | 2021-03-05 | 中国石油天然气股份有限公司 | Sand prevention device capable of replacing slurry outside pipe and slurry replacing method |
-
2008
- 2008-12-03 CN CNU2008202249004U patent/CN201306152Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443285A (en) * | 2019-09-02 | 2021-03-05 | 中国石油天然气股份有限公司 | Sand prevention device capable of replacing slurry outside pipe and slurry replacing method |
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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: 20090909 Termination date: 20100104 |