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Clamping jaw type spiral tooth centering device of coal bed gas well drainage mining pump

A technology for coalbed methane wells and centering devices, which is applied in the directions of components, pumps, pump elements, etc. of pumping devices for elastic fluids

Active Publication Date: 2018-12-07
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to effectively solve the centering problem of the plunger and pump barrel in the coalbed gas well drainage pump and overcome the defects and deficiencies of existing centralizers, the purpose of the present invention is to provide a coalbed gas well plunger and pump barrel with eccentric wear and low subsidence Jaw-type helical tooth centering device for high-speed working conditions

Method used

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  • Clamping jaw type spiral tooth centering device of coal bed gas well drainage mining pump
  • Clamping jaw type spiral tooth centering device of coal bed gas well drainage mining pump
  • Clamping jaw type spiral tooth centering device of coal bed gas well drainage mining pump

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Embodiment Construction

[0034] in figure 1 In the CBM well drainage pump jaw type spiral tooth centering device, it is mainly composed of a centering cover 3, a spiral tooth agitator 4, a centering base body 5, a centering coupling 6 and a docking jaw 7. The centering device It is connected to the bottom end of the extraction pipe 2 through the centering coupling 6, while the extraction rod 1 sequentially penetrates the centering cover 3, the spiral tooth agitator 4 and the centering coupling 6 and is connected to the plunger of the extraction pump , According to the double-cylindrical movement pair between the centering cover 3 and the centering coupling 6 and the extraction rod 1 to realize the downhole real-time centering between the plunger and the extraction rod 1 and the pump barrel.

[0035] in figure 1 The specifications of the claw-type spiral tooth centering device of the coalbed methane well drainage pump are consistent with the diameter of the extraction rod 1 and the diameter of the extracti...

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Abstract

The invention provides a clamping jaw type spiral tooth centering device of a coal bed gas well drainage mining pump, and applies to underground centering of the plunger and the pump cylinder. The centering device adopts a spiral tooth stirring and clamping jaw type butt joint technology, the low-sink-degree working condition coal powder can be effectively prevented from being deposited on the upper portion of the plunger and the middle cover body, and the coal powder clamping pump is avoided. The middle cover body is discharged according to the jet nozzles which are arranged in a layered modepumping the well liquid sucked by the pump into the annular space of the discharging and collecting rod and the discharging and collecting pipe, the spiral tooth stirrer is used for realizing the upper limit of the middle cover body and realizing the lower limit by centering the middle coupling, the centering base body is connected with the centering cover body and the butt joint clamping jaw ina three-in-one mode, the centering base body and the butt joint clamping jaw are arranged in a three-in-one mode, the butt joint clamping jaw realizes rapid butt joint between the middle cover body and the centering base body and the centering coupling, and meanwhile, the underground real-time alignment between the plunger and the drainage rod and the pump barrel is realized according to the double-column-surface moving pair between the centering coupling and the centering cover and the drainage rod, and the lifting speed of the well liquid above the plunger is completed through the middle coupling.

Description

Technical field [0001] The invention relates to a device for centering a plunger and a pump barrel of a coalbed methane well drainage pump operation, in particular to a downhole drainage pump centering device adopting spiral tooth stirring and claw type docking technology. Background technique [0002] CBM mining has entered a stable production stage, and the sinking degree in the wellbore is usually low. After the well fluid is pumped and discharged by the self-draining pump, the coal it carries is easily deposited in the annular space formed by the rod string and the pipe string above the plunger , Leading to the emergence of pulverized coal stuck pump problems. In addition, the drainage pump will encounter problems similar to the eccentric wear of the plunger and the pump barrel during the drainage and gas recovery operations, especially to solve the problem of the eccentric wear of the plunger and the pump barrel in the coalbed methane horizontal and inclined wells will have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/00F04B47/00
CPCF04B47/00F04B53/00
Inventor 刘新福吴建军刘国强李博周超何鸿铭
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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