CN201874524U - Wellhead check valve for water injection well - Google Patents
Wellhead check valve for water injection well Download PDFInfo
- Publication number
- CN201874524U CN201874524U CN2010206577363U CN201020657736U CN201874524U CN 201874524 U CN201874524 U CN 201874524U CN 2010206577363 U CN2010206577363 U CN 2010206577363U CN 201020657736 U CN201020657736 U CN 201020657736U CN 201874524 U CN201874524 U CN 201874524U
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- valve
- valve seat
- joint
- screw threads
- ball
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Abstract
The utility model provides a wellhead check valve for a water injection well. A valve seat is installed in a valve cover; screw threads at the upper part of a valve seat joint are connected with screw threads at the lower part of the valve cover; the upper end face of the valve seat props against a shoulder face in the valve cover; the upper end face of the valve seat joint props against the lower end face of the valve seat; a valve ball is arranged in the valve cover; the outer diameter of the valve ball is greater than the inner diameter of the valve seat; the valve ball is matched and sealed with an upper port of the valve seat; external screw threads at the lower part of the valve seat joint are connected with internal screw threads at the upper part of a connector; external screw threads at the upper part of the connector are connected with internal screw threads at the lower part of an outer barrel; the valve cover and the valve seat joint are located in the outer barrel; an outlet joint is welded to the side face of the outer barrel; a communicating groove is arranged on the valve cover; the communicating groove arranged on the valve cover is communicated with the outlet joint; a plugging joint is installed at the upper part of the outer barrel; the external screw threads at the lower part of the valve seat joint are left-hand screw threads; and the internal screw threads at the upper part of the connector are left-hand screw threads. The wellhead check valve is convenient to disassemble and maintain, and has good applicability.
Description
Technical field
The utility model relates to the device that the water injection well in oil fields well head is used, and is a kind of water injection well well head ball-and-seat.
Background technology
Because the water injection well strata pressure height that has, when water injection well stops annotating for some reason, be injected into injection water in the stratum and will return and tell in the Hui Jing, and with waterflood-transmission line earthward pumping plant reflux, water filling layer flow in returning the process of telling is big, flow velocity is fast, and the stratum produces exciting, easily reservoir sand is carried out, cause sand to bury water injection string, make it water filling again, the stratum water injection rate reduces, and influences well oil output.Because water filling again is forced to the operation well workover, increase operating cost.Behind sand card tubing string, also can occur during the operation well workover tripping out tubing string smoothly, carry out the heavy repair task of high cost, economic loss is huge.
Summary of the invention
The purpose of this utility model is a kind of water injection well well head ball-and-seat of design, when making water injection well stop annotating for some reason, is injected into injection water in the stratum and can not returns and tell in the Hui Jing, avoids water injection well to shake out, and guarantees the water injection well water filling that drives a well again smoothly.
The purpose of this utility model is achieved in that by the shutoff joint, valve bonnet, urceolus, valve ball, valve seat, valve base joint, connector, outlet connection is formed, valve seat is installed in the valve bonnet, valve base joint top screw thread is connected with the valve bonnet lower thread, the valve seat upper surface withstands on the interior circular bead surface of valve bonnet, the lower surface of valve seat is withstood in the valve base joint upper surface, valve ball is placed in the valve bonnet, 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 valve base joint lower external thread is connected with the connector upper internal threaded, the connector upper external thread is connected valve bonnet with the urceolus lower internal thread, valve base joint is in the urceolus, and outlet connection is welded on the side of urceolus, have UNICOM's groove on the valve bonnet, UNICOM's groove of opening on the valve bonnet communicates with outlet connection, and the shutoff joint is installed in urceolus top, is threaded between the two.
The valve base joint lower external thread is a left hand thread, and the connector upper internal threaded is a left hand thread.
The beneficial effects of the utility model are: after water injection well stops to annotate for some reason, valve ball falls, stop formation water to return the ground waterflood-transmission line, the stratum can not produce excitement, can not shake out, the water filling that can drive a well again smoothly after stopping annotating is avoided water injection well to stop to annotate the back for some reason and is produced economic loss, the utility model is convenient to the dismounting maintenance, and applicability is good.
Description of drawings
Fig. 1 is the assembling drawing of the utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described.
See by figure, embodiment of the present utility model is by shutoff joint 1, valve bonnet 2, urceolus 3, valve ball 4, valve seat 5, valve base joint 6, connector 7, outlet connection 8 is formed, valve seat 5 is installed in the valve bonnet 2, valve base joint 6 top screw threads are connected with valve bonnet 2 lower thread, valve seat 5 upper surfaces withstand on the circular bead surface in the valve bonnet 2, the lower surface that valve seat 5 is withstood in valve base joint 6 upper surfaces, valve ball 4 is placed in the valve bonnet 2, the external diameter of valve ball 4 is greater than the internal diameter of valve seat 5, the upper port fitted seal of valve ball 4 and valve seat 5, valve base joint 6 lower external thread are connected with connector 7 upper internal threaded, connector 7 upper external thread are connected with urceolus 3 lower internal thread, valve bonnet 2, valve base joint 6 is in the urceolus 3, outlet connection 8 is welded on the side of urceolus 3, has UNICOM's groove on the valve bonnet 2, and UNICOM's groove of opening on the valve bonnet 2 communicates with outlet connection 8, shutoff joint 1 is installed in urceolus 3 tops, is threaded between the two.Valve base joint 6 lower external thread are left hand thread, connector 7 upper internal threaded are left hand thread, for turning clockwise, can avoid valve base joint 6 top screw threads and valve bonnet 2 lower thread junction shackles when dismantling this button, the disposable whole taking-ups of parts that needs can be changed.
Claims (2)
1. water injection well well head ball-and-seat, by shutoff joint (1), valve bonnet (2), urceolus (3), valve ball (4), valve seat (5), valve base joint (6), connector (7), outlet connection (8) is formed, it is characterized in that: valve seat (5) is installed in the valve bonnet (2), valve base joint (6) top screw thread is connected with valve bonnet (2) lower thread, valve seat (5) upper surface withstands on the interior circular bead surface of valve bonnet (2), the lower surface of valve seat (5) is withstood in valve base joint (6) upper surface, valve ball (4) is placed in the valve bonnet (2), the external diameter of valve ball (4) is greater than the internal diameter of valve seat (5), the upper port fitted seal of valve ball (4) and valve seat (5), valve base joint (6) lower external thread is connected with connector (7) upper internal threaded, connector (7) upper external thread is connected with urceolus (3) lower internal thread, valve bonnet (2), valve base joint (6) is in the urceolus (3), outlet connection (8) is welded on the side of urceolus (3), valve bonnet has UNICOM's groove on (2), UNICOM's groove of opening on the valve bonnet (2) communicates with outlet connection (8), shutoff joint (1) is installed in urceolus (3) top, is threaded between the two.
2. water injection well well head ball-and-seat according to claim 1, valve base joint (6) lower external thread is a left hand thread, connector (7) upper internal threaded is a left hand thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206577363U CN201874524U (en) | 2010-12-01 | 2010-12-01 | Wellhead check valve for water injection well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206577363U CN201874524U (en) | 2010-12-01 | 2010-12-01 | Wellhead check valve for water injection well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201874524U true CN201874524U (en) | 2011-06-22 |
Family
ID=44162447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206577363U Expired - Fee Related CN201874524U (en) | 2010-12-01 | 2010-12-01 | Wellhead check valve for water injection well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201874524U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563947A (en) * | 2014-12-22 | 2015-04-29 | 中国石油天然气股份有限公司 | Downhole blowout preventing pipe column for oil well |
-
2010
- 2010-12-01 CN CN2010206577363U patent/CN201874524U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563947A (en) * | 2014-12-22 | 2015-04-29 | 中国石油天然气股份有限公司 | Downhole blowout preventing pipe column for oil well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20111201 |