Retrievable subsea choke valve with spool

Abstract

The invention discloses a valve element recyclable type underwater throttle valve. A throttle valve body is mainly composed of two parts including a valve element assembly and a valve body assembly which are arranged in a splitting manner, wherein a cage sleeve arranged at the lower end of the valve body assembly is inserted into the valve body; a nut-screw rod mechanism capable of rotating leftwards and rightwards is formed by a screw rod shaft arranged on a connector, and rotary pivoting shafts which are arranged on the left and right parts of an arch-shaped body hoop respectively; a driver assembly of the valve element assembly is driven by a pressure cylinder assembly; the pressure cylinder assembly drives a ratchet of a ratchet mechanism arranged on a power shaft to rotate, and drives a driving gear and a driven gear arranged on the power shaft to rotate in an engaging manner; the driven gear drives a valve rod assembly to do linear reciprocating motion; a cage sleeve connected with the lower end of the valve rod assembly is provided with a plurality of flow through holes with different hole diameters. The throttle valve disclosed by the invention can be used for accurately controlling rotary amount through stepping type rotation of the driving cylinder and the ratchet, so that the control precision is greatly improved, and the pressure of fluid of a pipeline basically keeps in a set range.

Description

technical field [0001] The invention relates to a throttling valve for controlling pipeline flow (pressure), in particular to an underwater throttle valve with a retrievable spool, which is mainly used for adjusting or controlling the flow (pressure) of liquid in the pipeline. Background technique [0002] In offshore oil production, the Christmas trees, oil pipelines, oil pipelines, etc. are all buried (laid) underwater. Due to the different formation parameters of each well, the pressure of the liquid (fluid) entering the pipeline from the Christmas tree is also quite different. , in order to bring the fluid of each well into the same manifold, it is necessary to adjust the pressure of the liquid (fluid) entering each sub-pipeline, so that the fluid pressure of each sub-pipeline entering the main pipeline is basically the same, ensuring the fluid pressure of the main pipeline It is basically constant within the set range to prevent the pressure from fluctuating outside the...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the common defects of existing control valves such as large structural size, low control accuracy, low reliability, and cumbersome recycling operations, and provide a simple structure, high control accuracy, and recyclable valve. Retrievable subsea choke valve with spool

Images