A drilling mud pump packing sealing structure

Abstract

The invention discloses a packing sealing structure of a drilling mud pump, which relates to the technical field of drilling engineering in the petroleum industry, and comprises an intermediate rod and a sealing letter. The sealing letter is sleeved on the outer side of the intermediate rod, and a gland is inserted on the sealing letter. A pressure cap is provided between the sealing letter and the gland, an inner annular groove is provided on the side of the pressure cap near the intermediate rod, an outer annular groove is provided on the side of the pressure cap near the sealing letter, and an outer annular groove is provided on the side of the sealing letter. An oil return hole is provided, and the oil return hole communicates with both the inner annular groove and the outer annular groove. An elastic component is provided between the sealing box and the gland, and a discharge component is provided inside the sealing box. The invention has a reasonable design. By setting the elastic component and using the intermediate rod to move at high speed, relative movement will occur between the sealing box and the gland. The gland transmits this power to the clamping component through the guide rod, so that the guide rod passes through the transmission rod. , The guide post and the fixed rod drive the fixed plate to squeeze to the intermediate rod, so as to achieve the purpose of improving the compactness between the sealing letter and the gland.

Description

technical field [0001] The invention relates to the technical field of drilling engineering in the petroleum industry, in particular to a packing sealing structure of a drilling mud pump. Background technique [0002] The mud pump is an extremely important and indispensable drilling equipment in drilling production. During the operation of the mud pump, since the frequency of reciprocating operation of the drilling mud pump rod is very high, up to 145 times per minute, wear and temperature rise will affect the stuffing box. The design of the sealing structure brings many challenges; the packing seal refers to a dynamic sealing device that generates a compressive force between the packing, the rotating part and the fixed part through the self-tightening effect of pre-tightening or medium pressure, also known as "stuffing box seal", There are many structural forms, mainly composed of packing, stuffing box and packing fixing parts. [0003] Due to the reciprocating high-speed ...

AI Technical Summary

Problems solved by technology

[0003] Due to the reciprocating high-speed vibration of the intermediary rod, long-term vibration will cause some parts of the sealing letter to loosen, thereby affecting the fixing of the sealing letter. In order to avoid damage to the sealing letter, the staff needs to conduct regular inspections, which wastes a lot of time. time, thus affecting the drilling efficiency, and each discharge of the sealing box requires the manual operation of the staff, which also wastes a lot of time and increases the difficulty of the work for the workers

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