A cylinder built-in variable diameter sealed submarine cable gate valve

Abstract

The invention relates to a variable diameter sealing submarine cable flashboard valve with a built-in cylinder body. The variable diameter sealing submarine cable flashboard valve with the built-in cylinder body comprises a shell, valves, flashboard assemblies and a hydraulic driving mechanism, wherein the valves are located at the two ends of the shell, the flashboard assemblies are arranged inside the shell, and the hydraulic driving mechanism is arranged inside the flashboard assemblies. Each flashboard assembly comprises a flashboard body and a flashboard front seal. The hydraulic drivingmechanism comprises the hydraulic cylinder body and a piston rod, wherein the hydraulic cylinder body is formed by the rear sides of the flashboard bodies. One end of the piston rod is fixed to a hydraulic piston which is arranged inside a hydraulic cylinder cavity of the hydraulic cylinder body, and the other end of the piston rod extends out of a hydraulic cylinder cover of the hydraulic cylinder body and is fixed to a side door. The variable diameter sealing submarine cable flashboard valve with the built-in cylinder body is simple in structure, small in integral length and small in size; sufficient power is provided for work of an umbilical cable; in addition, variable diameter motive seal can be achieved, and the friction force is small; the problems that when cleaning operation is conducted on an umbilical cable flashboard valve, efficiency is low, and the sealing effect is poor are solved; and an annular space formed between a pipe barrel and the umbilical cable can be effectively sealed, and good motive seal is achieved.

Description

technical field [0001] The invention relates to the field of offshore oil and gas drilling, in particular to a variable-diameter sealed submarine cable gate valve with a built-in cylinder body. Background technique [0002] Submarine cable gate valve is an important piece of equipment in the repair process of submarine pipeline operations. To complete cleaning and repair operations safely and efficiently, it must have sufficient and efficient power drive and good dynamic sealing performance. The machine has long length, large volume, heavy body, low working efficiency and poor sealing performance, which is especially insufficient in underwater operations. In order to reduce the length and volume of the whole machine, improve the working efficiency and sealing performance of the submarine cable gate valve, so that it can work safely, efficiently and reliably underwater, a variable diameter sealing submarine cable gate valve with a built-in cylinder is designed, which can effe...

AI Technical Summary

Problems solved by technology

[0002] Submarine cable gate valve is an important piece of equipment in the repair process of submarine pipeline operations. To complete cleaning and repair operations safely and efficiently, it must have sufficient and efficient power drive and good dynamic sealing performance. The machine is long in length, bulky, bulky, low in efficiency and poor in sealing performance, especially in underwater operations

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