CN202370478U - Safety device for gas injection and oil extraction wellhead - Google Patents
Safety device for gas injection and oil extraction wellhead Download PDFInfo
- Publication number
- CN202370478U CN202370478U CN2011205300767U CN201120530076U CN202370478U CN 202370478 U CN202370478 U CN 202370478U CN 2011205300767 U CN2011205300767 U CN 2011205300767U CN 201120530076 U CN201120530076 U CN 201120530076U CN 202370478 U CN202370478 U CN 202370478U
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- valve body
- housing
- screw thread
- spool
- cavity
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Abstract
The utility model discloses a safety device for a gas injection and oil extraction wellhead. The safety device comprises a shell, an end cover, a valve body, a valve core, a spring, a locking nut and a regulating screw tube, wherein an input channel is formed in the center of the left end of the shell; inner cavities of large and small cylinders are formed in the center of the right end of the shell; the valve body has a structure of the large and small cylinders; the small cylinder is positioned on the left side of the large cylinder; a cavity is formed on the right side in the center in the valve body; the left end of the valve core has a structure of a table cone, and a bulged pillar is arranged at the right end of the valve core; the valve core passes through the cavity in the center in the valve body; the spring is sleeved on the bulged pillar at the right end of the valve core; the regulating screw tube is arranged in threads on the internal surface of the right end of the valve body; the bottom of the right end of the regulating screw tube is pressed against the other end of the spring; the locking nut is arranged on the regulating screw tube; the valve body is arranged in threads on the internal surface of the large cylinder of the shell by threads on the external surface of the large cylinder on the valve body; and the end cover is arranged on threads on the external surface on the right side of the shell. By the safety device for the gas injection and oil extraction wellhead, an oil outlet tube of an oil extraction device can be prevented from being burst effectively.
Description
Technical field
The utility model relates to a kind of gas injection production wellhead safety device.
Background technology
Gas injection is recovered the oil and is belonged to secondary oil recovery, and its purpose is to increase strata pressure, improves production capacity and recovery ratio.The gas injection production wellhead is equipped with the gas injection extracting device of oil usually, and this gas injection extracting device of oil is provided with a plurality of flowlines.Because in the process that gas injection is recovered the oil, a plurality of flowlines of extracting device of oil bear bigger pressure, pressure even surpass 25MP sometimes, therefore big like this pressure is easy to make the flowline explosion on the extracting device of oil, thereby makes safety in production can not get guaranteeing.
The utility model content
The technical problem that the utility model will solve provides a kind of gas injection production wellhead safety device, and this gas injection production wellhead safety device can effectively prevent the flowline explosion on the extracting device of oil.
For solving the problems of the technologies described above, a kind of gas injection production wellhead of the utility model safety device contains housing, end cap, valve body, spool, spring, locking nut, adjusting screwed pipe; The housing left outer surface is provided with screw thread, and housing right side external surface is provided with screw thread, and the left end central authorities of housing are provided with input channel; The right-hand member central authorities of housing are provided with big or small cylindrical internal cavity, and small cylinder is positioned at the left side of big circle, and small cylinder is provided with output channel; The inner surface of big circle is provided with screw thread, and little circle communicates with described input channel, and the profile of valve body is big or small cylindrical structure; Small cylinder is positioned at the left side of large cylinder, and small cylinder is provided with outlet, and the right side of large cylinder is provided with shoulder; The external surface of large cylinder is provided with screw thread, and the right side of the interior central authorities of valve body is provided with cavity, and the left side of the interior central authorities of valve body is provided with import; The internal diameter of this import is less than the cavity internal diameter on central right side in the valve body, and the right side inner surface of central cavity is provided with screw thread in the valve body, and the left end of spool is the platform wimble structure; The right-hand member of spool is provided with projection, and spool is installed in the cavity of central authorities in the valve body, and the platform wimble structure of spool left end is arranged in the import of valve body left end; Said spring housing is contained on the projection of spool right-hand member, and the right-hand member of said adjusting screwed pipe is provided with the bottom, regulates screwed pipe and is contained in the screw thread of valve body right-hand member inner surface; The right-hand member bottom of regulating screwed pipe is pressed on the other end of said spring, and locking nut is contained in to be regulated on the screwed pipe, and valve body is through the screw thread of large cylinder external surface on it; Be contained in the screw thread of inner surface of the big circle of said housing, said end cap is contained on the screw thread that housing right side external surface is provided with.
Be provided with sealing density ring between the small cylinder surface of the surface of the small cylinder of said valve body and housing internal cavity.
Said housing and valve body are provided with oilhole.
When using above-mentioned safety device, can it be installed on the flowline of extracting device of oil, when pressure in the flowline surpasses 25MP; Be in the oil gas in the safety device housing input channel; Spool is pushed to spring one side and overcome the elastic force of spring, let out, the pressure in the flowline is reduced through the outlet of valve body and the output channel of housing; Thereby effectively prevented the explosion of flowline, safety in production is guaranteed.When pressure was lower than 25MP, the import that spring is pushed spool to valve body was closed it, prevented that the oil gas in the flowline from flowing out.
Description of drawings
Fig. 1 is the structural representation of a kind of gas injection production wellhead of the utility model safety device.
Fig. 2 is the B partial enlarged drawing among Fig. 1.
1. housings among the figure, 2. input channel, 3. import, 4. spool, 5. cavity, 6. output channel, 7. outlet, 8. oilhole, 9. valve body, 10. end cap, 11. springs, 12. locking nuts, 13. projections, 14. regulate screwed pipes, 15. sealing rings.
The specific embodiment
Among Fig. 1, a kind of gas injection production wellhead safety device contains housing 1, end cap 10, valve body 9, spool 4, spring 11, locking nut 12, regulates screwed pipe 14.Housing 1 left outer surface is provided with screw thread; Housing 1 right side external surface is provided with screw thread, and the left end central authorities of housing 1 are provided with input channel 2, and the right-hand member central authorities of housing 1 are provided with big or small cylindrical internal cavity; Small cylinder is positioned at the left side of big circle; Small cylinder is provided with output channel 6, and the inner surface of big circle is provided with screw thread, and little circle communicates with described input channel 2.The profile of valve body 9 is big or small cylindrical structure, and small cylinder is positioned at the left side of large cylinder, and small cylinder is provided with outlet 7; The right side of large cylinder is provided with shoulder, and the external surface of large cylinder is provided with screw thread, and the right side of the interior central authorities of valve body 9 is provided with cavity 5; The left side of the interior central authorities of valve body 9 is provided with import 3; The internal diameter of this import 3 is less than cavity 5 internal diameters on central right side in the valve body 9, and the right side inner surface of central cavity is provided with screw thread in the valve body 9, and the left end of spool 9 is the platform wimble structure.The right-hand member of spool 4 is provided with projection 13, and spool 4 is installed in the cavity 5 of central authorities in the valve body 9, and the platform wimble structure of spool 4 left ends is arranged in the import 3 of valve body 9 left ends.Said spring 11 is sleeved on the projection 13 of spool 4 right-hand members.The right-hand member of said adjusting screwed pipe 14 is provided with the bottom, regulates screwed pipe 14 and is contained in the screw thread of valve body 9 right-hand member inner surfaces, and the right-hand member bottom of regulating screwed pipe 14 is pressed on the other end of said spring 11.Locking nut 12 is contained in to be regulated on the screwed pipe 14, regulates screwed pipe 14 axial position in valve body 9 through adjustment, can adjust the elastic force size of spring 11, thereby can set different opening pressures.Valve body 9 is through the screw thread of large cylinder external surface on it, is contained in the screw thread of inner surface of said housing 1 big circle.Said end cap 10 is contained on the screw thread that housing 1 right side external surface is provided with.Be to improve sealing, between the small cylinder surface of the surface of the small cylinder of said valve body 9 and housing 1 internal cavity, be provided with sealing ring 15.For improving the flexibility that spool 4 moves, said housing 1 is provided with oilhole 8 with valve body 9.When using above-mentioned safety device, can it be installed on the flowline of extracting device of oil, when pressure in the flowline surpasses 25MP; Be in the oil gas in safety device housing 1 input channel 2; Spool 4 is pushed to spring 11 1 sides and overcome the elastic force of spring 11, let out, the pressure in the flowline is reduced through the outlet of valve body 9 and the output channel 6 of housing 1; Thereby effectively prevented the explosion of flowline, safety in production is guaranteed.When pressure was lower than 25MP, the import 3 that spring 11 is pushed spool 4 to valve body 9 was closed it, prevented that the oil gas in the flowline from flowing out.
Claims (3)
1. gas injection production wellhead safety device, it is characterized in that: contain housing, end cap, valve body, spool, spring, locking nut, adjusting screwed pipe, the housing left outer surface is provided with screw thread; Housing right side external surface is provided with screw thread, and the left end central authorities of housing are provided with input channel, and the right-hand member central authorities of housing are provided with big or small cylindrical internal cavity; Small cylinder is positioned at the left side of big circle, and small cylinder is provided with output channel, and the inner surface of big circle is provided with screw thread; Little circle communicates with described input channel, and the profile of valve body is big or small cylindrical structure, and small cylinder is positioned at the left side of large cylinder; Small cylinder is provided with outlet, and the right side of large cylinder is provided with shoulder, and the external surface of large cylinder is provided with screw thread; The right side of the interior central authorities of valve body is provided with cavity, and the left side of the interior central authorities of valve body is provided with import, and the internal diameter of this import is less than the cavity internal diameter on central right side in the valve body; The right side inner surface of central cavity is provided with screw thread in the valve body, and the left end of spool is the platform wimble structure, and the right-hand member of spool is provided with projection; Spool is installed in the cavity of central authorities in the valve body, and the platform wimble structure of spool left end is arranged in the import of valve body left end, and said spring housing is contained on the projection of spool right-hand member; The right-hand member of said adjusting screwed pipe is provided with the bottom, regulates screwed pipe and is contained in the screw thread of valve body right-hand member inner surface, and the right-hand member bottom of regulating screwed pipe is pressed on the other end of said spring; Locking nut is contained in to be regulated on the screwed pipe; Valve body is through the screw thread of large cylinder external surface on it, is contained in the screw thread of inner surface of the big circle of said housing, and said end cap is contained on the screw thread that housing right side external surface is provided with.
2. a kind of gas injection production wellhead safety device according to claim 1 is characterized in that: be provided with sealing density ring between the small cylinder surface of the surface of the small cylinder of said valve body and housing internal cavity.
3. a kind of gas injection production wellhead safety device according to claim 1, it is characterized in that: said housing and valve body are provided with oilhole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205300767U CN202370478U (en) | 2011-12-16 | 2011-12-16 | Safety device for gas injection and oil extraction wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205300767U CN202370478U (en) | 2011-12-16 | 2011-12-16 | Safety device for gas injection and oil extraction wellhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202370478U true CN202370478U (en) | 2012-08-08 |
Family
ID=46594185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205300767U Expired - Fee Related CN202370478U (en) | 2011-12-16 | 2011-12-16 | Safety device for gas injection and oil extraction wellhead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202370478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493783A (en) * | 2011-12-16 | 2012-06-13 | 江苏航天鸿鹏数控机械有限公司 | Safety device of gas-injection oil-extraction well opening |
-
2011
- 2011-12-16 CN CN2011205300767U patent/CN202370478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493783A (en) * | 2011-12-16 | 2012-06-13 | 江苏航天鸿鹏数控机械有限公司 | Safety device of gas-injection oil-extraction well opening |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120808 Termination date: 20161216 |