Drilling mud pump packing sealing structure

Abstract

The invention discloses a drilling mud pump packing sealing structure and relates to the technical field of petroleum industry drilling engineering, and the drilling mud pump packing sealing structurecomprises an intermediate rod and a sealing box, the sealing box is arranged on the outer side of the intermediate rod in a sleeving mode, a pressing cover is inserted into the sealing box, a pressing cap is arranged between the sealing box and the pressing cover, and an inner annular groove is formed in the side, close to the intermediate rod, of the pressing cap. An outer annular groove is formed in the side, close to the sealing box, of the pressing cap, an oil return hole is formed in the sealing box, the oil return hole is communicated with both the inner annular groove and the outer annular groove, an elastic assembly is arranged between the sealing box and the pressing cover, and a discharging assembly is arranged on the inner side of the sealing box. The drilling mud pump packingsealing structure is reasonable in design, by arranging the elastic assembly, when the intermediate rod moves at a high speed, relative movement occurs between the sealing box and the pressing cover,the pressing cover transmits the power to a clamping assembly through a guide rod, the guide rod drives a fixing plate to extrude towards the intermediate rod through a transmission rod, a guide column and a fixing rod, and therefore, the purpose of improving the compactness between the sealing box and the pressing cover is achieved.

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 ...

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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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