CN2583355Y - Constant pressure bleed value for oil well - Google Patents
Constant pressure bleed value for oil well Download PDFInfo
- Publication number
- CN2583355Y CN2583355Y CN 02283738 CN02283738U CN2583355Y CN 2583355 Y CN2583355 Y CN 2583355Y CN 02283738 CN02283738 CN 02283738 CN 02283738 U CN02283738 U CN 02283738U CN 2583355 Y CN2583355 Y CN 2583355Y
- Authority
- CN
- China
- Prior art keywords
- plug
- air inlet
- valve
- end plug
- gas ingress
- 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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- Safety Valves (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
Abstract
The utility model discloses a constant pressure bleed valve for an oil well, which is composed of an end plug, a valve body and a check valve, wherein, threads in the valve body are connected with a gas ingress end plug, and the other end of the gas ingress end plug is connected with an expansion corrugated pipe. The gas ingress end plug is provided with a gas ingress hole and a gas egress hole. A filter screen is fixed at the front end of the gas ingress end plug via a spring check ring, and a valve seat is fixed at the back end of the gas ingress end plug. In the utility model, a spring is replaced with the expansion corrugated pipe. Therefore, various disadvantages which can be caused by the spring are solved, and the safety coefficient of seal is increased. Moreover, one filter screen is designed at the point of a liquid inlet. Solids of large granule which are carried by some gases are filtered by the filter screen. Therefore, the blocking phenomenon of each sealing point is prevented.
Description
The utility model relates to a kind of oil well valve discharging gas under certain pressure, is applicable to oil field high liquid-gas ratio well well head level pressure venting, belongs to the production wellhead kit.
Solving the well that the oil field height contains gas liquid ratio, the well head of now being everlasting is equipped with valve discharging gas under certain pressure, is used for the level pressure venting, and its structure as shown in Figure 1.This well head valve discharging gas under certain pressure is owing to adopt spring as control device for opening, thereby has following shortcoming: the one, and the bad adjustment of the pretightning force of spring can't be transferred to design load in advance; The 2nd, spring corrosion rate under high liquid-gas ratio is very big, and is big to the coefficient of stiffiness influence of spring, will change after pretightning force work a period of time of spring; The 3rd, oil gas enters in the valve body chamber, usually has fluid to be condensed into dirt on spring, is exactly usually said " dead oil ", and dead oil blocks spring easily, will destroy the level pressure venting function of valve body.
The purpose of this utility model just provides a kind of oil well valve discharging gas under certain pressure of accurately level pressure.
The purpose of this utility model is achieved in that the oil well valve discharging gas under certain pressure is made up of plug, valve body, ball-and-seat, plug is threaded with valve body, the valve body internal thread is connected with the air inlet plug, the other end of air inlet plug is connected with the expansion bellows, have air inlet and venthole on the air inlet plug, the front end of air inlet plug is fixed with filter screen by internal circlip, the rear end is by the internal circlip fixed valve base, the front end dome needle stand of expansion bellows is on valve seat, and the mesopore front end of air inlet plug is blocked by plug.
The utility model has replaced spring with the expansion bellows, solved by spring cause all unfavorable, improved the safety factor of sealing, and designed a filter screen at inlet, filter the entrained bulky grain solid of some gases by it, prevented the stifled card phenomenon of each sealing place.
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1: existing oil well valve discharging gas under certain pressure structural representation;
Fig. 2: the utility model structural representation;
Fig. 3: the utility model partial enlarged drawing; Fig. 4: air inlet plug structural representation;
As Fig. 2, shown in 3, the oil well valve discharging gas under certain pressure is by plug 1, valve body 2, ball-and-seat 4 is formed, plug 1 is threaded with valve body 2, be connected with air inlet plug 10 at valve body 2 internal threads, as shown in Figure 4, the other end of air inlet plug 10 is connected with expansion bellows 14, expansion bellows 14 is equivalent to the effect of spring, it can produce pretightning force when inflation, have air inlet 6 and venthole 11 on the air inlet plug 10, air inlet 6 and venthole 11 respectively are three, and the front end of air inlet plug 10 is by the fixing filter screen 9 of internal circlip 8, and filter screen 9 has been solid bulky grain effects in the filter oil bubble foam, the rear end is by internal circlip 5 fixed valve bases 12, spherical 13 on the thimble of the front end of expansion bellows 14 works to be sealed into pore 6 on valve seat 12, the mesopore front end of air inlet plug 10 is blocked by plug 7.
Before the use, give 13 1 pretightning forces of spherical thimble for 14 inflations of expansion bellows, make its with valve seat 12 between have one to turn on the power, after liquid gas passes through air inlet 6 on the air inlet plug 10 and enters spool, if admission pressure is during greater than opening pressure, the bellows compression moves behind the spherical thimble 13, is opened between spherical thimble 13 and the valve seat 12, oil gas enters in the valve pocket of plug 1 and valve body 2 compositions by venthole 11, under oil-air pressure, open the cone 3 on the ball-and-seat 4, enter petroleum pipeline.
Claims (2)
1, a kind of oil well valve discharging gas under certain pressure is by plug (1), valve body (2), ball-and-seat (4) is formed, plug (1) is threaded with valve body (2), it is characterized in that: valve body (2) internal thread is connected with air inlet plug (10), the other end of air inlet plug (10) is connected with expansion bellows (14), have air inlet (6) and venthole (11) on the air inlet plug (10), the front end of air inlet plug (10) is fixed with filter screen (9) by internal circlip (8), the rear end is by internal circlip (5) fixed valve base (12), the spherical thimble of the front end of expansion bellows (14) (13) seat is on valve seat (12), and the mesopore front end of air inlet plug (10) is blocked by plug (7).
2, oil well valve discharging gas under certain pressure according to claim 1 is characterized in that air inlet (6) and venthole (11) respectively are 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02283738 CN2583355Y (en) | 2002-10-18 | 2002-10-18 | Constant pressure bleed value for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02283738 CN2583355Y (en) | 2002-10-18 | 2002-10-18 | Constant pressure bleed value for oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2583355Y true CN2583355Y (en) | 2003-10-29 |
Family
ID=33745320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02283738 Expired - Fee Related CN2583355Y (en) | 2002-10-18 | 2002-10-18 | Constant pressure bleed value for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2583355Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950643A (en) * | 2023-09-19 | 2023-10-27 | 中海油田服务股份有限公司 | Circuit framework structure of logging while drilling instrument |
-
2002
- 2002-10-18 CN CN 02283738 patent/CN2583355Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116950643A (en) * | 2023-09-19 | 2023-10-27 | 中海油田服务股份有限公司 | Circuit framework structure of logging while drilling instrument |
| CN116950643B (en) * | 2023-09-19 | 2023-11-17 | 中海油田服务股份有限公司 | Circuit framework structure of logging while drilling instrument |
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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 |