Liquid fill adapter for gas well

Abstract

The present invention provides one kind of natural gas well liquid filling joint, which includes one joint body with hollow cavity possessing opening in the lower end, one great displacement interface and one small displacement interface communicated to the hollow cavity set radially onto the joint body, one movable valve inside the hollow cavity and with truncated cone surface for fitting the inner surface of the hollow cavity hermetically, one valve cover with valve core leading hole and through hole fixed to the lower end of the joint body, and one valve core in the bottom of the movable valve. The joint is for filling liquid to natural gas well, and has features of smart structure, use convenience and high safety.

Description

technical field [0001] The invention relates to a liquid filling joint, in particular to a natural gas well liquid filling joint for liquid filling of a natural gas well. Background technique [0002] In the late stage of natural gas field development, the number of low-yield wells and salt-bound wells is increasing, and the maintenance workload of daily liquid injection is also increasing. Using the existing technology for liquid injection requires frequent cutting and welding of wellheads, which not only wastes a lot of manpower and material resources , damage the gas tree, and the work efficiency of liquid injection is low; at the same time, the wellhead of the gas well is in the field during natural gas production, and the phenomenon of stealing gas bags often occurs, resulting in gas production fluctuations, wellbore fluid accumulation, and casing corrosion. , which seriously interferes with the stable production of the gas well, and the degree of harm becomes more seri...

AI Technical Summary

Problems solved by technology

[0002] In the late stage of natural gas field development, the number of low-yield wells and salt-bound wells is increasing, and the maintenance workload of daily liquid injection is also increasing. Using the existing technology for liquid injection requires frequent cutting and welding of wellheads, which not only wastes a lot of manpower and material resources , damage the gas tree, and the work efficiency of liquid injection is low; at the same time, the wellhead of the gas well is in the field during natural gas production, and the phenomenon of stealing gas bags often occurs, resulting in gas production fluctuations, wellbore fluid accumulation, and casing corrosion. , which seriously interferes with the stable production of the gas well, and the degree of harm becomes more serious as the pressure of the gas well decreases

Images