CN203603843U - Well mouth check valve of water injection well - Google Patents
Well mouth check valve of water injection well Download PDFInfo
- Publication number
- CN203603843U CN203603843U CN201320692366.0U CN201320692366U CN203603843U CN 203603843 U CN203603843 U CN 203603843U CN 201320692366 U CN201320692366 U CN 201320692366U CN 203603843 U CN203603843 U CN 203603843U
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- valve
- valve seat
- joint
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- connector
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Abstract
The utility model discloses a well mouth check valve of a water injection well. A valve seat is installed in a pressing cap, and an upper thread of a supporting connector is connected with a thread of the pressing cap. The upper end face of the valve seat abuts against the circular bead plane inside the pressing cap. The upper end face of the supporting connector abuts against the lower end face of the valve seat. The external diameter of a valve ball is larger than the internal diameter of the valve seat. The valve ball is in sealing fit with an upper port of the valve seat. A lower outer thread of the supporting connector is connected with a lower inner thread of a lateral opening connector, an outlet connector is welded to a side hole of the lateral opening connector, a valve cap is placed on the pressing cap and provided with a through groove, annular space is formed between the outer wall of the supporting connector and the inner wall of the lateral opening connector, the upper thread of the supporting connector is located above the lateral opening connector, a lower thread of a sealing barrel is connected with an upper thread of the lateral opening connector, and the sealing barrel covers the valve cap and the pressing cap. The top of the sealing barrel is of a sealed structure, and when valve pieces need to be maintained, the sealing barrel is dismounted, the valve cap is taken away, the valve ball needing to be maintained is exposed outside, and dismounting, maintaining and replacing are convenient.
Description
Technical field
The utility model relates to the device that water injection well in oil fields well head is used, and is a kind of water injection well mouth check valve.
Background technology
Because the water injection well strata pressure having is high, in the time that water injection well stops noting for some reason, be injected into injected water in stratum and will return and tell in Hui Jing, and with waterflood-transmission line earthward pumping plant reflux, to tell flow in process large returning for water filling layer, flow velocity is fast, and stratum produces exciting, easily reservoir sand is carried out, cause sand to bury water injection string, make it water filling again, stratum water injection rate reduces, and affects well oil output.Due to water filling again, be forced to operation well workover, increase operating cost.When after sand card tubing string, when operation well workover, also there will be and can not trip out smoothly tubing string, carry out the heavy repair task of high cost, economic loss is huge.For this reason, develop water injection well mouth check valve, as Chinese patent: 200920021411.3 " water injection well mouth check valves ", can make to be injected into injected water in stratum can not return and tell in Hui Jing, but when it is arranged on well head, bottom and right side all will be welded on Well head flow path, need to overhaul time, be not easy to dismantle, maintenance and replacing parts trouble, maintenance and replacing parts required time are long.And for example Chinese patent 200420108009.4 water injection well mouth check valves, it simple in structure, but its valve seat fixes by interference fit and seals, and difficulty, the bad dismounting of valve seat are installed in processing.
Summary of the invention
The purpose of this utility model is a kind of water injection well mouth check valve of design, while making water injection well stop noting for some reason, be injected into injected water in stratum and can not return and tell in Hui Jing, avoid water injection well to shake out, guarantee the water injection well water filling that again drives a well smoothly, and maintenance and to change parts convenient.
The purpose of this utility model is achieved in that and comprises airtight cylinder, valve bonnet, valve ball, valve seat, pressure cap, lateral openings joint, supported joint, outlet connection, valve seat is arranged in pressure cap, the top screw thread of supported joint and being threaded of pressure cap, the upper surface of valve seat withstands on the circular bead surface in pressure cap, the lower surface of valve seat is withstood in the upper surface of supported joint, the external diameter of valve ball is greater than the internal diameter of valve seat, the upper port fitted seal of valve ball and valve seat, the lower external thread of supported joint is connected with the lower internal thread of lateral openings joint, outlet connection is welded on the side opening place of lateral openings joint, valve bonnet is placed on pressure cap, on valve bonnet, have UNICOM's groove, between the inwall of the outer wall of supported joint and lateral openings joint, there is annular space, the top screw thread of supported joint is on lateral openings joint, the lower thread of airtight cylinder is threaded with the top of lateral openings joint, airtight barrel cover is lived valve bonnet, pressure cap, between the inwall of airtight cylinder and the outer wall of pressure cap, there is annular space, the top of airtight cylinder is enclosed construction.
The beneficial effects of the utility model are: when water injection well stops after note for some reason, valve ball falls, and stops formation water to return to ground waterflood-transmission line, and stratum can not produce excitement, can not shake out, need to overhaul valve member time, dismantle airtight cylinder, take valve bonnet away, outside the valve ball that need to overhaul is just exposed to, be convenient to dismounting inspection and change, do not need package unit to disassemble, thereby applicability is good.
accompanying drawing explanation
Fig. 1 is the assembling drawing of the utility model embodiment.Fig. 2 is the shape figure of part 2 in Fig. 1.
the specific embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described.
As seen from the figure, embodiment of the present utility model comprises airtight cylinder 1, valve bonnet 2, valve ball 3, valve seat 4, pressure cap 5, lateral openings joint 6, supported joint 8, outlet connection 10, valve seat 4 is arranged in pressure cap 5, the top screw thread of supported joint 8 and being threaded of pressure cap 5, the upper surface of valve seat 4 withstands on the circular bead surface in pressure cap 5, the lower surface of valve seat 4 is withstood in the upper surface of supported joint 8, the external diameter of valve ball 3 is greater than the internal diameter of valve seat 4, the upper port fitted seal of valve ball 3 and valve seat 4, the lower external thread of supported joint 8 is connected with the lower internal thread of lateral openings joint 6, outlet connection 10 is welded on the side opening place of lateral openings joint 6, valve bonnet 2 is placed on pressure cap 5, valve bonnet 2 covers valve ball 3, valve ball 3 can radially significantly not moved, guarantee to drop on smoothly on valve seat 3, on valve bonnet 2, have UNICOM's groove 9, flow through stream for liquid, between the inwall of the outer wall of supported joint 8 and lateral openings joint 6, there is annular space 7, annular space 7 communicates with outlet connection 10, the top screw thread of supported joint 8 is on lateral openings joint 6, airtight cylinder 1 can be installed pipe wrench dismounting pressure cap 5 after removing, the lower thread of airtight cylinder 1 is threaded with the top of lateral openings joint 6, airtight cylinder 1 covers valve bonnet 2, pressure cap 5, between the inwall of airtight cylinder 1 and the outer wall of pressure cap 5, there is annular space, the napex of airtight cylinder 1 is enclosed construction.
Right-hand member and the injection well head assembly of outlet connection 10 weld together, the bottom of supported joint 6 and the welding of ground waterflood-transmission line.Injected water flows into injection well head assembly from outlet connection 10 and injects into well downwards after ground waterflood-transmission line enters jack-up valve ball 3.Need to change valve ball 3 time, remove airtight cylinder 1, take valve bonnet 2 away, outside valve ball 3 is exposed to, change valve ball 3 thereby can examine, as overhauled valve seat 4, then pressure cap is disassembled and just can realize maintenance valve seat 4.
Between valve bonnet 2 and pressure cap 5, there is no annexation, be convenient to open and inspect.
Claims (1)
1. a water injection well mouth check valve, comprise airtight cylinder (1), valve bonnet (2), valve ball (3), valve seat (4), pressure cap (5), lateral openings joint (6), supported joint (8), outlet connection (10), valve seat (4) is arranged in pressure cap (5), the top screw thread of supported joint (8) is threaded with pressure cap (5), the upper surface of valve seat (4) withstands on the circular bead surface in pressure cap (5), the lower surface of valve seat (4) is withstood in the upper surface of supported joint (8), the external diameter of valve ball (3) is greater than the internal diameter of valve seat (4), the upper port fitted seal of valve ball (3) and valve seat (4), the lower external thread of supported joint (8) is connected with the lower internal thread of lateral openings joint (6), outlet connection (10) is welded on the side opening place of lateral openings joint (6), it is characterized in that: valve bonnet (2) is placed on pressure cap (5), on valve bonnet (2), have UNICOM's groove (9), between the inwall of the outer wall of supported joint (8) and lateral openings joint (6), there is annular space (7), the top screw thread of supported joint (8) is on lateral openings joint (6), the lower thread of airtight cylinder (1) is threaded with the top of lateral openings joint (6), airtight cylinder (1) covers valve bonnet (2), pressure cap (5), between the airtight cylinder inwall of (1) and the outer wall of pressure cap (5), there is annular space, the top of airtight cylinder (1) is enclosed construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692366.0U CN203603843U (en) | 2013-10-28 | 2013-10-28 | Well mouth check valve of water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320692366.0U CN203603843U (en) | 2013-10-28 | 2013-10-28 | Well mouth check valve of water injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203603843U true CN203603843U (en) | 2014-05-21 |
Family
ID=50716520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320692366.0U Expired - Fee Related CN203603843U (en) | 2013-10-28 | 2013-10-28 | Well mouth check valve of water injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203603843U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482948A (en) * | 2020-10-27 | 2022-05-13 | 中国石油天然气股份有限公司 | Injection increasing system of water injection well |
-
2013
- 2013-10-28 CN CN201320692366.0U patent/CN203603843U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482948A (en) * | 2020-10-27 | 2022-05-13 | 中国石油天然气股份有限公司 | Injection increasing system of water injection well |
| CN114482948B (en) * | 2020-10-27 | 2023-09-26 | 中国石油天然气股份有限公司 | Injection increasing system of water injection well |
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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 |
Granted publication date: 20140521 Termination date: 20141028 |
|
| EXPY | Termination of patent right or utility model |