High pressure valve for drilling mud system

Abstract

The invention relates to a high pressure valve for a drilling mud system. A through fluid channel is arranged in a valve body, a wedge disc is inserted in a valve seat on the middle section of the fluid channel, a valve rod is connected to the top of the wedge disc, penetrates upwards out of the center of a valve deck and achieves sealing, a cylinder body is arranged above the valve deck, a hydraulic cylinder base at the lower end of the cylinder body is screwed to the periphery of a central boss of the valve deck, a cylinder cover is arranged at the top of the cylinder body, the valve rod penetrates upwards out of a central hole of the cylinder cover and achieves sealing with the cylinder cover, a piston is arranged in the cylinder body, and the piston is fixed to the valve rod. A cylinder body connecting block is connected to one side of the cylinder body, an upper connecting block oil port communicating with a cylinder body upper cavity oil port is formed in the upper portion of thecylinder body connecting block, an upper cavity oil port connector is screwed to an outer end opening of the upper connecting block oil port, a lower connecting block oil port communicating with a cylinder body lower cavity oil port is formed in the lower portion of the cylinder body connecting block, and a lower cavity oil port connector is screwed to an outer end opening of the lower connectingblock oil port. The valve achieves hydraulic quick opening and closing, and the working efficiency and the safety of underground construction are greatly improved.

Description

technical field [0001] The invention relates to a valve for an oil drilling rig, in particular to a high-pressure valve for a drilling mud system, and belongs to the technical field of valves for an oil drilling rig. Background technique [0002] The mud circulation system used for oil drilling rigs is to spray high-pressure fluid to the bottom of the well through one or more mud pumps through manifolds, gate groups, hoses, drilling tools and drill bit water holes, forming high-pressure fluid to wash the bottom of the well. And carry out the solid phase particles in the wellbore. The fluid drilling fluid participating in the circulation has the following functions: one is to clean the bottom of the well, suspend and carry cuttings, and keep the borehole clean; the other is to balance the formation pressure, stabilize the well wall, and prevent well collapse, blowout, and lost circulation; 1. To help the drill bit break rocks; 4. To transmit power for downhole dynamic drilli...

AI Technical Summary

Problems solved by technology

If the sub-driller enters the high-pressure area to switch the valve under the pressure-suppressed state, the leakage of the valve will pose a threat to the personal safety of the sub-driller, posing a safety hazard

Moreover, it is difficult to open the valve and the opening speed is slow when it is under pressure, which may easily lead to gate erosion

[0007] In order to prevent heavy objects from smashing the screw rod of the valve, there is a valve stem guard outside the screw rod. The valve stem guard protects the screw rod, and at the same time, it also makes it difficult to distinguish the open and closed states of the valve.

If the valve is in a half-open state, it is easy to affect the mud flow, and even cause erosion to the gate

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