Reciprocating type three-cylinder plunger pump for oil and gas field

A reciprocating, oil and gas field technology, applied in the direction of multi-cylinder pumps, variable displacement pump components, components of pumping devices for elastic fluids, etc., can solve the inconvenience of replacing packing, reverse spray, and insufficient lubrication of connecting rod big end bearing bushes and other issues to achieve the effect of improving life expectancy

Pending Publication Date: 2019-06-14
YANTAI JEREH PETROLEUM EQUIP & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems in the prior art that the working medium in the liquid end assembly is sprayed backwards along the plunger into the inside of the power end as

Method used

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  • Reciprocating type three-cylinder plunger pump for oil and gas field
  • Reciprocating type three-cylinder plunger pump for oil and gas field
  • Reciprocating type three-cylinder plunger pump for oil and gas field

Examples

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Embodiment Construction

[0032] Existing technologies such as figure 2 , image 3 As shown, the plunger 30 is directly installed on the crosshead 34 inside the power end assembly through the plunger connecting bolt 33. On the one hand, when the packing 6 used to seal the plunger 30 in the liquid end assembly 3 is damaged , the high-pressure working medium inside the liquid end assembly 3 will leak directly along the plunger 30, and then contact and destroy the seal in the seal seat assembly 31 at the power end assembly 1, and finally the inside of the liquid end assembly 3 The working medium will be sprayed back into the power end assembly 1; on the other hand, in order to seal the high-pressure working medium inside the liquid end assembly 3, the packing 6 has a very large interference with the plunger 30, That is, the packing 6 will hold the plunger 30 tightly, and the surface of the plunger 30 will be worn after working for a long time, and there will be deep grooves, and the working medium leake...

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Abstract

The invention provides a reciprocating type three-cylinder plunger pump for an oil and gas field. The reciprocating type three-cylinder plunger pump comprises a gear box assembly, a power end assemblyand a hydraulic end assembly which are transmitted in sequence; and the hydraulic end assembly comprises a disc root and a plunger, the power end assembly comprises a crankshaft, a connecting rod, asliding rail and a crosshead, power is transmitted from the crosshead to the plunger, a pull rod and a fender are arranged between the plunger and the crosshead, the pull rod is fixed on the cross head, the plunger is fixed to the pull rod, the fender is located between the pull rod and the plunger and fixed with the plunger, and the outer diameter of the fender is larger than that of the plungerand the pull rod. The reciprocating type three-cylinder plunger pump can solve the problems that a working medium in a hydraulic end assembly in the prior art is poured into a power end assembly alongthe plunger, a packing is inconvenient to replace, and a connecting rod large-head bearing bush is insufficient in lubrication and the like.

Description

technical field [0001] The invention relates to the field of oil and gas drilling and production equipment, in particular to a reciprocating three-cylinder plunger pump for oil and gas fields. Background technique [0002] The reciprocating three-cylinder plunger pump belongs to the positive displacement pump, which achieves the purpose of conveying liquid by means of the periodic change of the volume in the working chamber. When working, the mechanical energy is directly converted into the pressure energy of the conveying liquid through the plunger pump. Reciprocating plunger pumps are widely used in oil and gas fields, and are key components of oil and gas field cementing, acidizing, fracturing and other equipment. [0003] Reciprocating three-cylinder plunger pumps are generally installed back-to-back on vehicles or skids. When installed back-to-back, the total width of the two pumps cannot exceed road requirements. For example, when driving on the roads of China and Ru...

Claims

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Application Information

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IPC IPC(8): F04B1/00F04B53/00F04B53/02F04B53/14F04B53/18
Inventor 李晓斌崔海萍王继鑫郭涛
Owner YANTAI JEREH PETROLEUM EQUIP & TECH
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