Underwater electrohydraulic control valve

Abstract

The invention relates to an underwater electro-hydraulic control valve which is applied on a well control device used for deepwater drilling construction. A magnetic valve consists of an electromagnetic part and an oil pressure end. A spring sleeve and an iron core sleeve are arranged in the interior of a shell, sealing rings are arranged between the outer wall of the spring sleeve and the inner wall of the shell and between the outer wall of the iron core sleeve and the inner wall of the shell. A mandril is arranged at the lower part of the cylindrical iron core. When a magnetic coil generates magnetic force, the iron core and the mandril move. The oil-pressure end is fixed in the central hole of a pressing cover; the mandril is arranged at the upper part of the central hole of the valve body and a ball valve is arranged at the lower part of the central hole of the valve body. The control valve has the effect that: the valve can be used for controlling fluid with high pressure and small flow and is suitable for working in severe deepwater environment. The control valve meets the requirement of fast responsiveness, can work normally in a high pressure guiding fluid system simultaneously, and has iron core and mandril lubricating function, with simple structure, compactness, reliable sealing performance and fast response speed.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling machinery, in particular to a solenoid valve for a well control device used in deepwater drilling construction, in general, it is a solenoid valve for controlling the on-off of a pilot fluid. Background technique [0002] The current electromagnetic valve can be roughly divided into two types, one is composed of a spool valve core and an electromagnet part for controlling the movement of the spool valve core. Such as the Chinese patent announcement number is CN1644913 (patent number: 200410092753.6), the solenoid valve provided. This kind of solenoid valve can control the on-off of multiple flow channels to achieve more complex control objectives. However, due to the complex structure of the slide valve, the machining accuracy is difficult to guarantee, and internal leakage or instability often occurs. The second is to directly control the movement of a ball valve spool by the solenoid...

AI Technical Summary

Problems solved by technology

For example, the Chinese patent announcement number is CN1643283 (patent number: 03806366.2). The second type of solenoid valve has compact structure, fast action and less leakage, but because the solenoid coil directly controls the ball valve core, and the valve core is small in size, it can Low pressure, not suitable for high pressure system

Existing solenoid valves are generally used in ground working environments and cannot be used underwater

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