An ultra-high pressure gas production wellhead device without any rubber seal

By using metal sealing structures and separation and pressure reduction components in ultra-high-pressure gas wellhead devices, the problems of easy deformation of rubber seals and impurity impact are solved, efficient impurity removal and stable sealing are achieved, and the service life and safety of the device are improved.

CN119801429BActive Publication Date: 2025-10-03JIANHU COUNTY HONGDA VALVE FITTINGS CO LTD
2 Cites 0 Cited by

Patent Information

Application Number
CN202510000609.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-02
Publication Date
2025-10-03
Estimated Expiration
2045-01-02

AI Technical Summary

Technical Problem

In traditional ultra-high-pressure gas wellhead devices, rubber seals are prone to deformation and aging under high-pressure environments, resulting in a decrease in sealing performance. Impurities such as sand and wax clumps also impact the main control valve, affecting sealing and safety.

Method used

It adopts metal sealing structure and separation and decompression components, including separation cylinder, spiral blades, metal sealing ring and high-strength airbag. It achieves efficient impurity removal and stable sealing through centrifugal force and airbag buffering and pressure reduction, combined with transmission parts and pressure sensors.

Benefits of technology

It improves the stability of the sealing structure and the impurity removal efficiency, reduces the impact of high-pressure airflow on the main control valve, extends the service life, and enhances the continuity and safety of the device.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention belongs to the technical field of gas wellhead devices, and specifically relates to an ultra-high-pressure gas wellhead device without any rubber seals, which includes a four-way pipe, a manual gate valve, a throttle valve, an instrument flange, a seismic pressure gauge, a hydraulic safety valve, a separation and pressure reducing assembly, an upper flange, a casing head body, and a casing hanger assembly; a sealing gasket ring 1 and a sealing gasket ring 2 are respectively installed between the upper flange and the casing hanger assembly, and the casing hanger assembly is connected to the inner cavity of the casing head body through an inner and outer metal sealing ring 1 and an inner and outer metal sealing ring 2 respectively. The metal sealing structure of the present invention has higher stability than rubber seals. The metal seal can withstand high pressure without permanent deformation or loss of sealing ability, so that the present invention can be applied to more severe gas production conditions, reducing the number of shutdowns and maintenance due to damage to the seals, and improving the continuity and efficiency of gas production operations.
Need to check novelty before this filing date? Find Prior Art