Electromagnetic pneumatic switch well valve of natural gas well

Abstract

An electromagnetic pneumatic switch well valve of a natural gas well is applied to a natural gas well site and a natural gas transmission pipeline. The electromagnetic pneumatic switch well valve is characterized by being provided with a cylindrical-shaped main valve core in a valve body; a valve cover is fixed at the upper part of the main valve core; a spring is arranged in the main valve core; a pressure balancing hole is arranged on the wall of the main valve core; intercommunication holes are arranged in the valve body and the valve cover; a magnetic head fixing base is connected with the top part of the valve cover; a pressure releasing hole is arranged on the valve cover; a traverse electromagnetic head and a longitudinal electromagnetic head are fixed on the magnetic head fixing base by a union cap; and a ring-shaped groove is arranged on the outer wall of a longitudinal magnetic core, wherein the position of the ring-shaped groove is characterized in that when the longitudinal magnetic core is lifted upwards and then can open the intercommunication holes completely, a traverse magnetic core can lock the longitudinal magnetic core. The electromagnetic pneumatic switch well valve has the advantages that the natural gas wellhead pipeline can be applied to; the valve switch can be finished by relying on a weak electromagnetic force without relying on the drive of an external connection air source; the remote control on a switch well and an excessive-under pressure well by a natural gas wellhead is achieved by a control circuit; the gas source is automatically cut off at excessive-under pressure for achieving protection; and remote control for opening and closing and under pressure automatic closing can be achieved.

Description

technical field [0001] The invention relates to the technical field of oilfield gas recovery, in particular to an electromagnetic-pneumatic switch valve on a natural gas well site and a gas transmission pipeline. Background technique [0002] During the production process of natural gas wells, when the downhole throttling process is used for production, the wellbore and surface pipelines can be designed with medium and low pressure. At this time, in order to prevent the failure of the downhole choke to damage the downstream medium and low pressure pipelines and corresponding equipment, and to prevent a large amount of natural gas leakage caused by the rupture of the downstream pipeline, the wellhead needs to install a high and low pressure safety protection cut-off device. At this time, the well switching work can only be completed at the well site. When the area of ​​the gas field is large, the number of production wells is large, and the well locations are dispersed, when...

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Problems solved by technology

However, gas wells are located in scattered locations and have no extern

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