A choke valve for a wellhead Christmas tree

By designing a rotating shaft in the wellhead tree throttle valve to drive the bottom plate and positioning frame to rise and fall, combined with the cone plate scraping and motor-driven cleaning functions, the problems of condensation in the throttle valve core and cumbersome maintenance are solved, achieving high-precision flow control and simplified maintenance, and improving the efficiency and safety of oil production operations.

CN122215679BActive Publication Date: 2026-08-04CEPAI GRP CO LTD
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Patent Information

Application Number
CN202610693757.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-05-20
Publication Date
2026-08-04
Estimated Expiration
2046-05-20

AI Technical Summary

Technical Problem

After long-term use, existing wellhead production tree throttle valves are prone to crude oil condensation, waxing, or adhesion and solidification on the valve core surface, resulting in lagging opening control, reduced throttle adjustment accuracy, cumbersome maintenance procedures, affecting the accuracy and stability of oil production operations, and time-consuming and labor-intensive maintenance processes, leading to reduced production efficiency.

Method used

A wellhead production tree throttling valve was designed. The base plate and positioning frame are raised and lowered by rotating the shaft, which can adjust the number of insertions between the positioning frame and the fixing groove. Combined with the scraping function of the cone plate, it can automatically remove attached crude oil and condensate. The motor drives the gear and rack ring to drive the shuttle block for multi-stage cleaning, which simplifies the maintenance process and enables quick replacement.

Benefits of technology

It enables graded throttling control of crude oil flow, improves regulation accuracy and stability, simplifies maintenance procedures, reduces downtime and labor costs, and enhances the efficiency and reliability of oil production operations.

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Abstract

This invention belongs to the field of throttling valve technology, specifically a wellhead tree throttling valve. It includes a rotating shaft rotatably mounted on the top of the valve body, with a base plate fixed to the bottom end of the shaft. The valve body has an internal valve cavity, with a guide frame fixed inside. A positioning plate is fixed to the top of the guide frame, and a fixing groove is formed on the surface of the positioning plate. A sealing element is provided on the lower surface of the positioning plate to seal the fixing groove. Several guide grooves are formed on the lower surface of the base plate, and several positioning frames are fixed to the lower surface of the base plate, with the positioning frames increasing in a stepped manner. A disassembly assembly is provided on the upper surface of the positioning frames. The sealing element includes several positioning grooves formed on the lower surface of the positioning plate, with a positioning spring fixed to each groove. One end of the positioning spring is fixed to a conical plate, and two conical plates combine to form the sealing element, sealing the fixing groove. By incorporating the disassembly and processing components, the problem of poor throttling effect in existing throttling valves is solved.
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