CN107401391B - One-way valve for high-pressure water injection well of oil field - Google Patents
One-way valve for high-pressure water injection well of oil field Download PDFInfo
- Publication number
- CN107401391B CN107401391B CN201710741422.8A CN201710741422A CN107401391B CN 107401391 B CN107401391 B CN 107401391B CN 201710741422 A CN201710741422 A CN 201710741422A CN 107401391 B CN107401391 B CN 107401391B
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- China
- Prior art keywords
- outer cylinder
- valve
- plug
- water injection
- inner valve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 238000002347 injection Methods 0.000 title claims abstract description 37
- 239000007924 injection Substances 0.000 title claims abstract description 37
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Check Valves (AREA)
Abstract
The invention provides a one-way valve for an oilfield high-pressure water injection well, which comprises an outer cylinder, an inner valve and a plug, wherein a water injection pipe is arranged on the side wall of the outer cylinder, a water inlet is arranged at the bottom opening, the inner valve is arranged in the outer cylinder and can be in sliding sealing arrangement with the inner wall of the outer cylinder, a water outlet is arranged on the side wall of the inner valve, the water outlet is arranged corresponding to the water injection pipe, the upper part of the plug is in threaded connection with the inner wall of the outer cylinder, the lower part of the plug is in sliding sealing arrangement with the inner wall of the outer cylinder, and a hooking device is arranged at the center of the bottom of the plug and is connected with the top of the inner valve. The invention has simple structure and convenient operation, and can prolong the service life and reduce the maintenance cost.
Description
Technical Field
The invention belongs to the technical field of check valves, and relates to a check valve for a high-pressure water injection well in an oil field.
Background
Currently, in oilfield production, a water injection well is widely provided with a single flow valve at a wellhead in order to prevent formation from back-jetting water and sand. The prior check valve used for the water injection well is a high-pressure horizontal check valve, and the reverse closure is realized by the action of a spring or gravity in the valve body. Meanwhile, due to corrosion, the valve ball and the valve seat are damaged due to long-term impact or injected water contains various impurities and scales, so that the impurities and the scales are adhered to the valve and the valve seat of the check valve, and the check valve is damaged and closed untight after being used for a period of time, and the reverse check valve is lost. When the water injection well is stopped due to reasons, stratum water can reversely flow into the shaft due to the action of stratum pressure difference, and a large amount of stratum sand is carried by the stratum water under the reaction force to form a stratum sand-spitting phenomenon, so that the water injection layer and the water injection pipe column of the water injection well are buried with sand, the water injection well cannot normally produce, and the water injection well has to perform operations such as sand flushing, sand prevention, pipe inspection and the like, so that huge expenditure of operation cost is caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing the one-way valve for the high-pressure water injection well of the oil field, which can realize that the outer cylinder of the one-way valve is not replaced, the inner valve is independently replaced, and the one-way valve is simple to install and detach and convenient to maintain.
The technical scheme adopted for solving the technical problems is as follows: a check valve for oil field high pressure water injection well, its characterized in that: the water injection device comprises an outer cylinder, an inner valve and a plug, wherein a water injection pipe is arranged on the side wall of the outer cylinder, a water inlet is formed in the bottom opening of the outer cylinder, the inner valve is installed inside the outer cylinder and is in sliding sealing arrangement with the inner wall of the outer cylinder, a water outlet is formed in the side wall of the inner valve, the water outlet is correspondingly arranged with the water injection pipe, the upper portion of the plug is in threaded connection with the inner wall of the outer cylinder, a hooking device is arranged in the center of the bottom of the plug and is connected with the top of the inner valve.
According to the technical scheme, the internal valve comprises an internal valve body, a valve seat, a ball valve core and a baffle, wherein the internal valve body is of a cylindrical structure with a central hole at the top of an opening at the bottom, the top of the internal valve body is connected with the hooking device, the baffle is in threaded connection with the inner wall at the bottom of the internal valve body, the valve seat is arranged on the baffle, and the ball valve core is arranged on the valve seat.
According to the technical scheme, the shoulder is arranged below the inner wall of the outer cylinder, the bottom of the inner valve body is configured with the shoulder, and the inner wall of the inner valve body is provided with the spigot which is configured with the top of the valve seat.
According to the technical scheme, the hooking device comprises a hanging rod and a hanging disc, wherein the bottom of the hanging rod is connected with the center of the top of the hanging disc, the top of the hanging rod is connected with the center of the bottom of the plug, the hanging disc is arranged in the cavity inside the inner valve body, and the diameter of the hanging disc is larger than the diameter of the center hole of the top of the inner valve body.
According to the technical scheme, the baffle is uniformly provided with the water filtering holes.
According to the technical scheme, the center of the top of the plug is provided with the screwing support, and the screwing support is provided with the screwing hole.
According to the technical scheme, the O-shaped sealing ring is arranged between the lower part of the plug and the outer cylinder, the O-shaped sealing ring is arranged between the lower part of the inner valve body and the outer cylinder, and the O-shaped sealing ring is arranged between the valve seat and the inner valve body.
The beneficial effects of the invention are as follows: the utility model provides a check valve for oil field high pressure water injection well, when ball case and disk seat seal fail, rotatory end cap makes end cap and urceolus separation, pulls out the internal valve together through hanging plate, after changing ball case and disk seat, installs internal valve and end cap in the urceolus again, realizes the dismantlement change of check valve, solves the unable cleaning ball case and the disk seat of the check valve of current structure, maintains inconvenient technical problem, has avoided whole change check valve, improves the check valve reliability, and the structure is simpler, and the operation is more convenient, great extension device's life and reduction operation maintenance cost.
Drawings
Fig. 1 is a schematic structural view of a suspension body according to an embodiment of the present invention.
Wherein: the water injection device comprises an outer barrel 1, a water injection pipe 2, a plug 3, a water outlet 4, an inner valve body 5, a valve seat 6, a ball valve core 7, a baffle 8, a water filtering hole 9, a hanging rod 10, a hanging disc 11, a screwing support 12, a screwing hole 13 and a water inlet 14.
Detailed Description
For a better understanding of the present invention, reference is made to the following description of the invention taken in conjunction with the accompanying drawings and examples.
As shown in figure 1, the one-way valve for the high-pressure water injection well of the oil field comprises an outer cylinder 1, an inner valve and a plug 3, wherein a water injection pipe 2 is arranged on the side wall of the outer cylinder, a water inlet 14 is arranged at the bottom opening, the inner valve is arranged inside the outer cylinder and is in sliding sealing arrangement with the inner wall of the outer cylinder, a water outlet 4 is arranged on the side wall of the inner valve, the water outlet is arranged corresponding to the water injection pipe, the upper part of the plug is in threaded connection with the inner wall of the outer cylinder, the lower part of the plug is in sliding sealing arrangement with the inner wall of the outer cylinder, and a hooking device is arranged at the center of the bottom of the plug and is connected with the top of the inner valve.
The internal valve comprises an internal valve body 5, a valve seat 6, a ball valve core 7 and a baffle plate 8, wherein the internal valve body is of a cylindrical structure with a central hole at the top of an opening at the bottom, the top of the internal valve body is connected with a hooking device, the baffle plate is in threaded connection with the inner wall at the bottom of the internal valve body, the valve seat is arranged on the baffle plate, and the ball valve core is arranged on the valve seat. The lower part of the inner wall of the outer cylinder is provided with a shoulder, the bottom of the inner valve body is configured with the shoulder, the inner wall of the inner valve body is provided with a spigot and the top of the valve seat are configured to position the valve seat, an O-shaped sealing ring is arranged between the valve seat and the inner valve body for sealing, and water filtering holes 9 are uniformly distributed on the baffle plate, so that coarse filtration can be performed, and impurities in water are simply filtered.
The hooking device comprises a hanging rod 10 and a hanging disc 11, wherein the bottom of the hanging rod is connected with the center of the top of the hanging disc, the top of the hanging rod is connected with the center of the bottom of the plug, the hanging disc is arranged in the cavity in the inner valve body, and the diameter of the hanging disc is larger than the aperture of the center hole of the top of the inner valve body. When the plug rises in a rotating way, the hanging plate is attached to the inner valve body, and the inner valve is driven to rise along the outer cylinder until the inner valve is separated from the outer cylinder.
The center of the top of the plug is provided with a screwing support 12, the screwing support is provided with a screwing hole 13, and when the plug is disassembled or installed, an auxiliary screwing rod can be inserted into the screwing hole, so that the operation of screwing the plug is convenient and labor-saving.
When the water injection well is filled with water, the injected water enters the outer barrel from the inlet at the lower part of the outer barrel, then is filtered by the baffle plate and enters the inner valve body, the ball valve core is separated from the valve seat under the action of the injected water pressure, at the moment, the water injection channel is opened, the injected water in the inner valve enters the water injection pipe along the water outlet, and finally flows to the water injection well; when the water injection well stops injecting water, the ball valve core falls under the action of pressure difference and self gravity and is matched with the valve seat to close the inner valve, so that the water injection channel is closed; when the sealing of the ball valve core and the valve seat fails, the plug is separated from the outer cylinder by rotating the plug, the inner valve is pulled out together through the hanging disc, and after the ball valve core and the valve seat are replaced, the inner valve and the plug are installed in the outer cylinder, so that the operation is continued, and the integral replacement of the one-way valve is avoided.
Claims (3)
1. A check valve for oil field high pressure water injection well, its characterized in that: the water injection device comprises an outer cylinder, an inner valve and a plug, wherein a water injection pipe is arranged on the side wall of the outer cylinder, an opening at the bottom is a water inlet, the inner valve is arranged in the outer cylinder and is in sliding sealing arrangement with the inner wall of the outer cylinder, a water outlet is arranged on the side wall of the inner valve, the water outlet is correspondingly arranged with the water injection pipe, the upper part of the plug is in threaded connection with the inner wall of the outer cylinder, the lower part of the plug is in sliding sealing arrangement with the inner wall of the outer cylinder, and a hooking device is arranged in the center of the bottom of the plug and is connected with the top of the inner valve; the inner valve comprises an inner valve body, a valve seat, a ball valve core and a baffle, wherein the inner valve body is of a cylindrical structure with an opening at the bottom and a central hole at the top, the top of the inner valve body is connected with the hooking device, the baffle is in threaded connection with the inner wall at the bottom of the inner valve body, the valve seat is arranged on the baffle, and the ball valve core is arranged on the valve seat; a shoulder is arranged below the inner wall of the outer cylinder, the bottom of the inner valve body is configured with the shoulder, and a spigot is arranged on the inner wall of the inner valve body and is configured with the top of the valve seat; the hooking device comprises a hanging rod and a hanging disc, the bottom of the hanging rod is connected with the center of the top of the hanging disc, the top of the hanging rod is connected with the center of the bottom of the plug, and the hanging disc is arranged in the cavity of the inner valve body and has a diameter larger than the aperture of the center hole of the top of the inner valve body; and water filtering holes are uniformly distributed on the baffle plate.
2. The one-way valve for the high-pressure water injection well of the oil field according to claim 1, wherein a screwing support is arranged in the center of the top of the plug, and a screwing hole is formed in the screwing support.
3. A one-way valve for an oilfield high-pressure water injection well according to claim 1 or 2, wherein an O-ring is arranged between the lower part of the plug and the outer cylinder, an O-ring is arranged between the lower part of the inner valve body and the outer cylinder, and an O-ring is arranged between the valve seat and the inner valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741422.8A CN107401391B (en) | 2017-08-25 | 2017-08-25 | One-way valve for high-pressure water injection well of oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710741422.8A CN107401391B (en) | 2017-08-25 | 2017-08-25 | One-way valve for high-pressure water injection well of oil field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107401391A CN107401391A (en) | 2017-11-28 |
| CN107401391B true CN107401391B (en) | 2023-09-19 |
Family
ID=60397833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710741422.8A Active CN107401391B (en) | 2017-08-25 | 2017-08-25 | One-way valve for high-pressure water injection well of oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107401391B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2594202A1 (en) * | 1986-02-07 | 1987-08-14 | Thevignot Sa Ets | Tap with a spherical rotating part |
| CN2802081Y (en) * | 2005-04-19 | 2006-08-02 | 吕云波 | Multifunction injection weld down-hole flow for oil field water injection well |
| CN201460850U (en) * | 2009-08-07 | 2010-05-12 | 北京金科龙石油技术开发有限公司 | Automatic counter-flow resisting device |
| CN201874523U (en) * | 2010-11-18 | 2011-06-22 | 杨统 | Conveniently disassembled type wellhead check valve for water injection well |
| CN202834281U (en) * | 2012-09-19 | 2013-03-27 | 浙江万盛机械有限公司 | Combined valve |
| CN103542148A (en) * | 2013-10-12 | 2014-01-29 | 浙江盾安阀门有限公司 | Reducing valve with filtering and backflow preventing functions |
| CN207296962U (en) * | 2017-08-25 | 2018-05-01 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | A kind of check valve for high oil field water injection well |
-
2017
- 2017-08-25 CN CN201710741422.8A patent/CN107401391B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2594202A1 (en) * | 1986-02-07 | 1987-08-14 | Thevignot Sa Ets | Tap with a spherical rotating part |
| CN2802081Y (en) * | 2005-04-19 | 2006-08-02 | 吕云波 | Multifunction injection weld down-hole flow for oil field water injection well |
| CN201460850U (en) * | 2009-08-07 | 2010-05-12 | 北京金科龙石油技术开发有限公司 | Automatic counter-flow resisting device |
| CN201874523U (en) * | 2010-11-18 | 2011-06-22 | 杨统 | Conveniently disassembled type wellhead check valve for water injection well |
| CN202834281U (en) * | 2012-09-19 | 2013-03-27 | 浙江万盛机械有限公司 | Combined valve |
| CN103542148A (en) * | 2013-10-12 | 2014-01-29 | 浙江盾安阀门有限公司 | Reducing valve with filtering and backflow preventing functions |
| CN207296962U (en) * | 2017-08-25 | 2018-05-01 | 中国石油化工股份有限公司胜利油田分公司清河采油厂 | A kind of check valve for high oil field water injection well |
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| Publication number | Publication date |
|---|---|
| CN107401391A (en) | 2017-11-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191210 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Applicant after: QINGHE OIL PRODUCTION PLANT OF SINOPEC SHENGLI OILFIELD CO. Address before: 262714 Shandong Province, Shouguang City, Yang Kou Zhen Qinghe oil production plant Applicant before: QINGHE OIL PRODUCTION PLANT OF SINOPEC SHENGLI OILFIELD CO. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |