CN209875113U - Well head single current valve - Google Patents
Well head single current valve Download PDFInfo
- Publication number
- CN209875113U CN209875113U CN201821465620.2U CN201821465620U CN209875113U CN 209875113 U CN209875113 U CN 209875113U CN 201821465620 U CN201821465620 U CN 201821465620U CN 209875113 U CN209875113 U CN 209875113U
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- valve
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- seat
- check valve
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Abstract
The utility model relates to a well head check valve that is used for oil field water injection to annotate and gathers well belongs to the well head valve field that the well was used is annotated to the oil field water injection, including valve body, case subassembly and filter equipment, the case subassembly includes disk seat and case, and the case is located in the disk seat upper end, and filter equipment is whole with case subassembly releasable connection, and this whole removable assembly is in the valve body. The wellhead check valve with the structure can prevent welding slag, impurities, dirt and the like from depositing on the ball seat to cause sealing failure, and meanwhile, the valve ball, the valve seat and the filtering device are convenient to clean and replace, and the feasibility of field operation is high.
Description
Technical Field
The utility model belongs to well head valve that the well was used is annotated in oil field water injection, concretely relates to well head single current valve.
Background
Check valves are very common valves used in oil fields, and mainly function to control the flow direction of fluid. The action principle is that a valve ball is clamped in a valve body, when the upper part of the valve ball is pressurized, the valve ball is clamped in the valve body under the action of pressure, and a channel in the valve body is closed; when the lower part of the valve ball is pressurized, the valve ball is flushed by pressure, a flow passage in the valve body is opened, and fluid can pass through the valve body.
At present, most of water injection polymer injection wells are not provided with a wellhead check device, when the water injection polymer injection wells are accidentally stopped from pumping, perforated by pipelines, decompressed, depressurized and washed, the injection pressure is suddenly reduced, liquid in the stratum can carry impurities, polymer lumps and stratum sand to enter a water injection polymer injection tool and a water injection polymer injection pipe column, so that the water injection polymer injection tool and the water injection pipe column are blocked, a testing tool cannot be put into the water injection polymer injection well, the well washing is not conducted, the operation is reworked, even the overhaul operation is carried out, and serious economic loss is caused.
To the above-mentioned problem, chinese utility model patent that the grant bulletin number is CN206144524U discloses a well filters single current valve, its valve ball is placed in the valve ball frame, the sub-unit connection of disk seat and valve ball frame, there is the UNICOM groove on the valve ball frame, the upper portion of valve ball frame is connected with the upper portion of valve body, the disk seat is sat on the inside circular bead of valve body, outer filter tube, well filter tube, be connected with the UNICOM board after the interior filter tube suit, the upper portion of plug is inserted to the lower part of interior filter tube, plug and valve body lower part threaded connection, push up the UNICOM board on the inside circular bead of valve body. However, when the structure is used, the valve ball frame and the screw plug need to be detached respectively to take out the valve ball, the valve seat and the filter pipe for cleaning and replacement, and the field operation is inconvenient.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a well head single current valve to solve the inconvenient dismantlement and this clean technical problem of well head single current device of gathering well in-process is annotated in oil field water injection.
In order to achieve the above purpose, the utility model provides a technical scheme does: the utility model provides a well head check valve, includes valve body, case subassembly and filter equipment, the case subassembly includes disk seat and case, filter equipment and case subassembly releasable connection are as an organic whole, and this whole detachable assembly is in the valve body.
The utility model has the advantages that: adopt filter equipment and case subassembly releasable connection as whole and this whole removable assembly be in this kind of quick detachable structure in the valve body, made things convenient for clean the change of case subassembly and filter equipment for this check valve's life increases greatly.
Furthermore, in order to enable the valve core assembly to be conveniently detached from the valve body, a stop structure is arranged on the inner wall of the valve body, a matching structure matched with the valve seat is arranged on the valve seat, the valve core assembly is pressed and installed in the valve body through a pressing piece arranged at one end of the valve body, and the pressing piece is detachably connected with the valve body.
Furthermore, the valve core is a ball type valve core positioned at the upper end of the valve seat, so that the ball type valve core can stably abut against the valve seat to realize sealing in the gravity falling process, the problem of short-time sealing untight caused by the fact that the ball type valve core is easily subjected to eccentric wear by pressing the ball type valve core by a spring is solved, meanwhile, in order to limit the valve ball to move towards the upper part under the action of pressure, a ball blocking cover is detachably connected to the upper end of the valve seat, and the pressing piece is pressed on the ball blocking cover.
Further, in order to prevent the backflow of the liquid, a sealing fit between the outer periphery of the valve seat and the inner wall surface of the valve body is defined.
Further, in order to reduce the machining precision of the valve body and the valve seat, the periphery of the valve seat is limited to be in sealing fit with the inner wall surface of the valve body through at least one sealing ring.
Further, in order to facilitate the integral assembly and disassembly into the valve body, the sealing ring is limited to be arranged on the outer peripheral surface of the valve seat.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the wellhead check valve;
FIG. 2 is a schematic structural diagram of embodiment 2 of the wellhead check valve;
in the figure: 1-pressing cap, 2-valve body, 3-reinforcing ring, 4-connector, 5-ball retaining cover, 6-valve ball, 7-valve seat, 8-sealing ring, 9-filtering net, 10-overflowing hole and 11-damping element.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
Embodiment 1 of the utility model: as shown in figure 1, the wellhead check valve comprises a pressure cap 1, a valve body 2, a valve core assembly and a ball blocking cover 5, wherein the valve core assembly comprises a valve ball 6 and a valve seat 7, a connector 4 is welded at the eccentric hole of one side of the valve body 2, the safety and reliability of the wellhead device are ensured for further improving the welding strength, and a reinforcing ring 3 is welded outside the connector 4 and clings to the valve body 2. The valve seat 7 is installed in the valve body 2, the valve seat 7 and the valve body 2 are sealed through a sealing ring 8, the valve seat 7 is of a central hole structure, a conical surface enabling the valve ball 6 to stably abut against the valve seat 7 to achieve sealing is arranged on the central hole, and the inner diameter of the central hole is smaller than the radius of the valve ball 6. The upper part of the valve seat 7 is connected with a ball blocking cover 5 used for limiting a valve ball 6 through a screw thread, the outer wall of one side of the connector 4 of the ball blocking cover 5 is provided with an overflowing hole 10 so as to realize the communication between the inside of the valve body 2 and the connector 4, and the lower part of the valve seat 7 is connected with a mesh type filter screen 9 through a screw thread. The ball blocking cover 5, the valve core assembly and the filter screen 9 form an integral detachable structure which is inserted into the valve body 2, the integral detachable structure is fixed in the valve body 2 through the pressing cap 1, and the pressing cap 1 is sealed with the valve body 2 through the tubular buckle. By adopting the integral plug-in structure, the valve core assembly and the filter screen 9 can be cleaned and replaced conveniently, so that the service life of the wellhead check valve is greatly prolonged.
Annotate and gather well in-process, when needs are dismantled and are changed case subassembly and filter screen 9, pull down the tubular buckle and take out pressure cap 1, can take out the whole detachable construction that ball cover 5, case subassembly and filter screen 9 formed from valve body 2, can carry out the clean change of valve ball 6 and disk seat 7 through dismantling the screw thread between disk seat 7 and the ball cover 5, the screw thread between disk seat 7 and the filter screen 9, can also clear away the machine on the filter screen 9 simultaneously and mix.
Embodiment 2 of the present invention, as shown in fig. 2, as an improvement to embodiment 1, the top center position of the ball retainer 5 is further provided with a damping element 11, when the valve ball 6 is pressed and rises upwards to contact with the damping element 11, so that the impact of the valve ball 6 on the top of the ball retainer 5 is absorbed, and the service life of the wellhead check valve is further prolonged.
Embodiment 3 of the present invention is different from embodiment 1 in that: the wellhead check valve is applied to the process of an oil field water injection well, and the filter screen 9 is of a slotted structure.
Embodiment 4 of the present invention is different from embodiment 1 in that: the wellhead check valve is applied to the process of an oil field water injection well, the filter screen 9 is of a slotted structure, and the top center of the ball blocking cover 5 is also provided with a damping element 11.
Embodiment 5 of the present invention is different from embodiment 1 in that: the upper end of the valve seat 7 is in threaded connection with a valve ball frame, a communicating groove is formed in one side of the connecting head 4 of the valve ball frame, and the upper portion of the valve ball frame is in threaded connection with the valve body 2.
Embodiment 6 of the present invention is different from embodiment 1 in that: the ball type valve core is a needle valve.
Claims (6)
1. The utility model provides a well head check valve, includes valve body, case subassembly and filter equipment, the case subassembly includes disk seat and case, its characterized in that: the filtering device and the valve core assembly are detachably connected into a whole, and the whole is detachably assembled in the valve body; to facilitate cleaning and replacement of the cartridge assembly and filter device.
2. A wellhead check valve as claimed in claim 1, wherein: the valve core assembly is arranged in the valve body through a pressing piece arranged at one end of the valve body in a pressing mode, and the pressing piece is detachably connected with the valve body.
3. A wellhead check valve as claimed in claim 2, wherein: the valve core is a ball type valve core positioned at the upper end of the valve seat, the upper end of the valve seat is detachably connected with a ball blocking cover, and the pressing piece is pressed on the ball blocking cover.
4. A wellhead check valve as claimed in claim 1, wherein: the periphery of the valve seat is in sealing fit with the inner wall surface of the valve body.
5. A wellhead check valve as claimed in claim 4, wherein: the periphery of the valve seat is in sealing fit with the inner wall surface of the valve body through at least one sealing ring.
6. A wellhead check valve as claimed in claim 5, wherein: the sealing ring is arranged on the peripheral surface of the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821465620.2U CN209875113U (en) | 2018-09-07 | 2018-09-07 | Well head single current valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821465620.2U CN209875113U (en) | 2018-09-07 | 2018-09-07 | Well head single current valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209875113U true CN209875113U (en) | 2019-12-31 |
Family
ID=68946106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821465620.2U Active CN209875113U (en) | 2018-09-07 | 2018-09-07 | Well head single current valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209875113U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949379A (en) * | 2023-03-08 | 2023-04-11 | 黑龙江铸力石油机械制造有限责任公司 | Oil increasing device and oil production device with same |
-
2018
- 2018-09-07 CN CN201821465620.2U patent/CN209875113U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949379A (en) * | 2023-03-08 | 2023-04-11 | 黑龙江铸力石油机械制造有限责任公司 | Oil increasing device and oil production device with same |
| CN115949379B (en) * | 2023-03-08 | 2023-09-05 | 黑龙江铸力石油机械制造有限责任公司 | Oil increasing device and oil extraction device with same |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |