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Drilling pump valve box and valve cover sealing structure

A sealing structure, drilling pump technology, applied in pump elements, variable capacity pump components, components of pumping devices for elastic fluids, etc. and other problems, to achieve the effect of good sealing performance, compact structure and long service life

Pending Publication Date: 2022-01-28
黄秀芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The idea of ​​the present invention is to solve the quality problems such as the sealing failure of the valve box and the valve cover of the drilling pump and the short service life of the sealing ring. The reasons for these quality problems should be analyzed, and then corresponding countermeasures should be taken

Method used

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  • Drilling pump valve box and valve cover sealing structure
  • Drilling pump valve box and valve cover sealing structure
  • Drilling pump valve box and valve cover sealing structure

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] The embodiments of the present invention are not limited to the following examples, and various changes made without departing from the gist of the present invention fall within the protection scope of the present invention.

[0022] The implementation of the present invention takes a five-cylinder drilling pump above 2200hp as an example. Because the valve boxes of the drilling pump suction valve box and discharge valve box have the same sealing structure as the valve cover, the suction valve box is used as an example.

[0023] see Figure 1 to Figure 6 In this embodiment, a drilling pump valve box and bonnet sealing structure includes an improved bonnet 1, an O-ring 2, an improved suction valve box 3, an improved front bonnet 4, a rectangular sealing ring 5, and an improved front suction Valve box 6, valve box 7, stud 8, sealing ring ...

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PUM

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Abstract

The invention discloses a drilling pump valve box and valve cover sealing structure, and relates to the field of petroleum engineering equipment. The sealing structure comprises a valve cover, an O-shaped sealing ring, the valve box, a sawtooth thread, a step end face, an outer cylindrical surface, an O-shaped groove, an inner step end face, an inner cylindrical surface and the like. With the rising of the use pressure of a drilling pump, an original simple sealing structure of the valve box and the valve cover of the low-pressure drilling pump has the problems of sealing failure, short service life of a sealing ring and damage to the valve box and the valve cover, and the existing solution which changes the structures of the valve box and the valve cover, arranges the valve box, the valve cover and the sealing ring, and additionally arranges 12 double-end studs, a valve gland, a valve deck flange and 12 nuts increases the weight by 30%, but still has the quality problems that sealing fails and the service life of a sealing ring. The sealing structure of the invention reserves advantage of the simple structure of a valve box and a valve deck of an original low-pressure drilling pump, and well solves the sealing quality problem of the valve box and the valve deck of a high-pressure drilling pump.

Description

technical field [0001] The invention relates to the field of petroleum engineering equipment, in particular to a sealing structure for a valve box and a valve cover of a drilling pump. Background technique [0002] At present, the sealing structure of the valve box and the valve cover of the drilling pump plays an auxiliary sealing role. The outer cylindrical surface of the valve cover and the inner cylindrical surface of the valve box cooperate with a small gap, and the gap is 0.015mm to 0.24mm. The stepped end face of the cover is in close contact with the stepped end face of the valve box, pressing the rectangular sealing ring, and the compression amount of the rectangular sealing ring is 0.30mm-0.60mm. This sealing structure is very simple, only need to screw the thread of the bonnet into the internal thread of the valve box to achieve sealing. This sealing technology was introduced from the United States in the 1970s. This technology was very successful in the 1970s and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/10F04B53/16F04B53/22F04B53/00
CPCF04B53/10F04B53/16F04B53/22F04B53/00
Inventor 黄秀芳
Owner 黄秀芳