CN202007650U - Buoyancy-type valve shaft bottom blowout prevention switch - Google Patents
Buoyancy-type valve shaft bottom blowout prevention switch Download PDFInfo
- Publication number
- CN202007650U CN202007650U CN2011201292846U CN201120129284U CN202007650U CN 202007650 U CN202007650 U CN 202007650U CN 2011201292846 U CN2011201292846 U CN 2011201292846U CN 201120129284 U CN201120129284 U CN 201120129284U CN 202007650 U CN202007650 U CN 202007650U
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- joint
- float
- cylindrical shell
- shaft bottom
- type valve
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- Expired - Fee Related
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- Check Valves (AREA)
- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
The utility model relates to a buoyancy-type valve shaft bottom blowout prevention switch. The buoyancy-type valve shaft bottom blowout prevention switch comprises an upper joint (1) and a lower joint (7). A cylinder (4) is in threaded connection between the upper joint (1) and the lower joint (7). A float cylinder (6) is arranged in the cylinder (4). The upper end of the float cylinder (6) is in threaded connection with a nylon joint (3). A sealed hollow float is formed by the float cylinder (6) and the nylon joint (3). A table shell (2) is in threaded connection outside the upper end of the nylon joint (3). The upper part of the table shell (2) is a spherical surface. The inner surface of the upper joint (1) is provided with a conical surface. The circumference seal is formed by the spherical surface of the table shell (2) and the conical surface in the upper joint (1). By the tool, the problem of the requirement of an electric pump well, a pumping unit well, and a screw pump well on mud lubrication in the operation and construction process can be solved.
Description
Technical field
The utility model relates to the used a kind of downhole tool of oil field oil recovery field operation, especially a kind of floatage-type valve shaft bottom blowout prevention special switch.
Background technology
The valve that uses mainly contains turnover panel and turns round yellow formula valve, Extension Spring-type valve at present.During normal the use, rely on tapping pin that the valve assembly is pushed open, open oil flow channel, this moment, spring was in the twisted state of stretching or compression.Because pump detection period long (generally at 3-5), (depth of setting is between the 850-1050m to work under bad environment, the underground work temperature is about 45 ℃, extraction liquid contains sulfide, sulfide has corrosion function to steel), when the secondary pump detection and workover, the spring failure of valve is serious, causes the valve secondary operation more than 60% poorly sealed, can only trip out and be lowered to new valve again.Increase cost of production, be unfavorable for safety in production and environmental protection simultaneously.
Summary of the invention
In order to overcome the deficiency in the background technology, the utility model provides a kind of floatage-type valve shaft bottom blowout prevention special switch.This instrument needs the problem of mud lubrication in the time of can solving electric pump well, rod-pumped well, screw bolt well job execution.
The technical solution adopted in the utility model is: this floatage-type valve shaft bottom spraying prevention switch comprises top connection and lower contact, cylindrical shell is threaded between top connection and the lower contact, be provided with the float cylindrical shell in the cylindrical shell, the nylon joint is threaded on the float cylindrical shell, float cylindrical shell and nylon joint are formed airtight hollow float, nylon upper end of joint external screw thread connects the billiard table housing, billiard table housing top is sphere, the top connection inner surface is provided with the conical surface, and the conical surface in the sphere of billiard table housing and the top connection forms the circumference sealing.
The beneficial effect that the utility model had: float material of the present utility model adopts high strength, low-density glass fiber reinforced nylon 6, and airtight hollow float and steel hemispherical Shell body and function are threaded, and firm welding.Its natural buoyancy in inactive liquid is designed to 0.1Kg, and only relying on buoyancy is that power both can make ball valve close voluntarily.Close the back under differential pressure action, make the hemisphere face of buoyancy aid and the circumference of ball seat conical surface formation seal more reliable.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1-top connection, 2-billiard table housing, 3-nylon joint, 4-cylindrical shell, 5-abrasionproof are set upright part, 6-float cylindrical shell, 7-lower contact.
The specific embodiment:
Below in conjunction with accompanying drawing the utility model is further specified: as shown in Figure 1:
This floatage-type valve shaft bottom spraying prevention switch comprises top connection 1 and lower contact 7, and the cylindrical shell 4 that is threaded between top connection 1 and the lower contact 7 is provided with float cylindrical shell 6 in the cylindrical shell 4, and float cylindrical shell 6 outer walls are provided with abrasionproof and set upright part 5.The float cylindrical shell 6 upper ends nylon joint 3 that is threaded, float cylindrical shell 6 and nylon joint 3 are formed airtight hollow float, float closes in the make and break of buoyancy ShiShimonoseki, law of buoyancy is closed power for switch provides, having changed existing valve is the power mode that valve is closed with the elastic force, has ensured the reliability of its work.The float material has adopted low-density, high-intensity glass fiber reinforced nylon 6, and its mechanical performance height is to satisfy the working environment of complicated states such as down-hole high pressure, well corrosion.Nylon joint 3 upper external screw threads connect billiard table housing 2, and billiard table housing 2 tops are sphere, and top connection 1 inner surface is provided with the conical surface, and the conical surface in the sphere of billiard table housing 2 and the top connection 1 forms the circumference sealing.Adopt sphere to contact the circumference sealing of formation with taper seat, sealing performance is reliable.
Switch discharges packer and the back of giving up (packer and valve tubing string set shutoff and be reserved in the well) by ground hydraulic power when being lowered in the production string the above projected depth of perforated interval with Y441-114 or FXY445 back-off packer are supporting.Be lowered to bottom band and disclose the pump line post of tool, when disclosing tool and act on the hemisphere top, down-hole switch is opened production.When the construction of inspection pump took place once more, the upper lifting pipe post was disclosed tool and is broken away from and contact with hemisphere face, closed owing to exercise ball valve on the buoyancy float, and sleeve pipe liquid flows owing to the realization snubbing serving is closed in packer and valve work.
Claims (2)
1. floatage-type valve shaft bottom spraying prevention switch, comprise top connection (1) and lower contact (7), cylindrical shell (4) is threaded between top connection (1) and the lower contact (7), it is characterized in that: be provided with float cylindrical shell (6) in the cylindrical shell (4), nylon joint (3) is threaded on the float cylindrical shell (6), float cylindrical shell (6) and nylon joint (3) are formed airtight hollow float, nylon joint (3) upper external screw thread connects billiard table housing (2), billiard table housing (2) top is sphere, top connection (1) inner surface is provided with the conical surface, and the conical surface in the sphere of billiard table housing (2) and the top connection (1) forms the circumference sealing.
2. floatage-type valve according to claim 1 shaft bottom spraying prevention switch is characterized in that: float cylindrical shell (6) outer wall is provided with abrasionproof and sets upright part (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201292846U CN202007650U (en) | 2011-04-27 | 2011-04-27 | Buoyancy-type valve shaft bottom blowout prevention switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201292846U CN202007650U (en) | 2011-04-27 | 2011-04-27 | Buoyancy-type valve shaft bottom blowout prevention switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202007650U true CN202007650U (en) | 2011-10-12 |
Family
ID=44749308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201292846U Expired - Fee Related CN202007650U (en) | 2011-04-27 | 2011-04-27 | Buoyancy-type valve shaft bottom blowout prevention switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202007650U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630214A (en) * | 2019-09-27 | 2019-12-31 | 四川海盾石油新技术开发有限公司 | Plunger for natural gas production well |
| CN111636851A (en) * | 2020-05-07 | 2020-09-08 | 中国石油天然气股份有限公司 | Shaft float switch and method for controlling shaft switch |
-
2011
- 2011-04-27 CN CN2011201292846U patent/CN202007650U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630214A (en) * | 2019-09-27 | 2019-12-31 | 四川海盾石油新技术开发有限公司 | Plunger for natural gas production well |
| CN111636851A (en) * | 2020-05-07 | 2020-09-08 | 中国石油天然气股份有限公司 | Shaft float switch and method for controlling shaft switch |
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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: 20111012 Termination date: 20140427 |