Plug for changing valve of coiled tubing head at natural gas wellhead
By designing a plug-in for valve replacement for continuous oil pipe head for natural gas wellhead, using a combination structure of mechanical plug-in, connecting shaft, sealing ring and rubber, the problem of inconvenient sealing and gas partitioning in the prior art is solved, and the convenience of wellhead valve replacement and safety of natural gas transportation is achieved.
CN222701943UActive Publication Date: 2025-04-01SHAANXI CHUANLULIAN OIL & GAS ENG TECH CO LTD
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Patent Information
- Application Number
- CN202421559746.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-07-03
AI Technical Summary
Technical Problem
The existing casing plugger is difficult to seal the continuous oil pipe, and it is not convenient to partition the gas in the well, affecting the replacement of the wellhead valve.
Method used
A plug-in for valve replacement of natural gas wellhead continuous oil pipe head is designed, including mechanical plug-in, connecting shaft, sealing ring and rubber. Through a multi-layer sealing structure connecting shaft and sealing ring, combined with the extrusion and sealing effect of rubber, effective sealing and gas partitioning of continuous oil pipes are achieved.
Benefits of technology
Multi-layer sealing and gas partitioning of the continuous oil pipe is achieved, simplifying the replacement process of wellhead valves and ensuring the safety of natural gas transportation.
✦ Generated by Eureka AI based on patent content.
Abstract
The utility model discloses a plug for changing valves of a continuous tubing head at a natural gas wellhead, comprising a mechanical plug, a connecting shaft and a rubber. The connecting shaft is connected to the plug body, and a plurality of sealing grooves are evenly opened along the length direction of the connecting shaft on the peripheral wall of one end of the connecting shaft away from the plug body, and a sealing ring is installed in the sealing groove, and the sealing ring is used to seal the gas channel of the continuous tubing. Through the setting of the connecting shaft and the plurality of sealing rings arranged along the length direction of the circumference thereof, the plurality of sealing rings perform multi-layer sealing on the gas channel of the continuous tubing, and through the rubber arranged at the bottom of the plug body, when a downward force is applied to the plug body, the rubber is squeezed, so that the rubber seals the upper plane of the continuous tubing. The plug provided in the embodiment of the present application is specially designed according to the structure of the continuous tubing installed under the natural gas wellhead, so as to facilitate the isolation of the gas in the natural gas well, and then facilitate the replacement of the wellhead valve on the continuous tubing.
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