Linkage continuous circulation valve

Abstract

The invention discloses a linkage type continuous circulating valve. The linkage type continuous circulating valve comprises a valve body, a ball valve, a knob, a bypass plug, and a drive gear, a driven gear sliding bush and a bypass sliding bush arranged in the valve body in sequence from the top to bottom; the knob is firmly connected with the drive gear for rotating the valve core; the drive gear is a bevel gear; the driven gear sliding bush is arranged at the lower part of the valve core, the upper head face of the driven gear sliding bush is a bevel gear matched with the drive gear, and the lower end of the driven gear sliding bush partially extends towards the downside to insert in a groove formed in the peripheral surface of the upper end of the bypass sliding bush; a first bypass hole is formed in the side wall of the bypass sliding bush, a second bypass hole is opened in the lower part of the valve body corresponding to the first bypass hole, and the bypass plug is blocked in the second bypass hole. The linkage type continuous circulating valve is capable of avoiding the valve plate and sealing ring erosion and the reset spring damage; the bypass is opened / closed when the main path is closed / opened; the fluid passage in the valve body is full-bore, and subsurface equipment is convenient to enter.

Description

technical field [0001] The invention relates to the field of continuous circulation drilling, in particular to a linkage continuous circulation valve. Background technique [0002] The continuous circulation drilling technology can realize the uninterrupted circulation of the drilling circulation medium when connecting and unloading a single root or column, and effectively solve the complex drilling accidents caused by the interruption of the drilling medium circulation, such as bottomhole pressure fluctuations, debris deposition, wellbore collapse and overflow, etc. This technology has been widely used in oil and gas exploration and development. [0003] Continuous circulation drilling technology mainly includes continuous circulation drilling device and valve type continuous circulation drilling system. Limited by technological development, at present, the valve-type continuous circulation drilling system is the main way to realize continuous circulation drilling, and the...

AI Technical Summary

Problems solved by technology

[0004] 1. Affected by structural components, full-bore circulation cannot be realized, and the inclinometer tool is blocked from entering;

[0005] 2. The valve plate is closed by the return spring, and it needs to consume part of the hydraulic energy when it is opened;

[0006] 3. The valve plate is seriously eroded;

[0007] 4. The return spring is prone to fatigue damage

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