High-reliability underwater gate valve execution mechanism

Abstract

The invention belongs to the field of oil and gas field development, and particularly relates to a high-reliability underwater gate valve execution mechanism. The high-reliability underwater gate valve execution mechanism comprises a valve rod, a valve cover, a reset spring, an execution mechanism cylinder barrel, an execution mechanism piston rod, a piston, an execution mechanism cylinder barrel tail end check ring, a conversion mechanism, an execution mechanism connecting rod, a hydraulic hose, a tail end plug and a tail end connecting rod; the valve cover, the execution mechanism cylinder barrel, the tail end plug and a bearing end cover are fixedly connected in sequence to form a hollow shell; the valve rod, the reset spring, the execution mechanism piston rod, the piston and the execution mechanism cylinder barrel tail end check ring form a main system hydraulic execution mechanism; and the conversion mechanism, the execution mechanism connecting rod, the hydraulic hose and the tail end connecting rod form a standby system thread transmission execution mechanism. When a main system fails, a standby system is started immediately. The high-reliability underwater gate valve execution mechanism has the beneficial effects that drive control over the opening and closing action of a valve can be excellently completed, and meanwhile reliability of the execution mechanisms is greatly improved.

Description

technical field [0001] The invention belongs to the field of oil and gas field development, and in particular relates to a highly reliable underwater gate valve actuator. Background technique [0002] Subsea gate valve is an important subsea mining equipment and an important part of subsea tree and subsea manifold. At present, the common underwater gate valve actuator is a hydraulic actuator. Its working principle is to introduce pressure oil, the hydraulic pressure pushes the piston and compresses the return spring, and the piston drives the valve stem to push the gate to open the valve; keep the hydraulic pressure constant, The valve is in the normally open state; when the pressure oil is removed, the hydraulic pressure acting on the piston disappears, and the piston returns to the initial position under the action of the return spring, and at the same time drives the valve stem and the gate plate to return to the initial position, realizing the valve. closure. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] At present, the underwater gate valve has the following problems: Since the underwater gate valve works in the subsea oil field, it is very difficult to repair it if it fails, and the maintenance cycle is long. In many cases, the underwater oil recovery production system needs to be shut down, which seriously affects the development of the underwater oil and gas field. As a result, the current underwater oil and gas exploration puts forward higher requirements on the reliability of the underwater gate valve actuator. It is hoped that there will be less maintenance or no maintenance within the working life, so as to ensure the normal and continuous operation of underwater oil and gas extraction.

Images