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Downhole cleaning device

A technology of cleaning device and impeller, which is applied in the direction of cleaning equipment, drilling equipment, wellbore/well parts, etc., can solve the problems of increased production cost, environmental impact, huge amount of money and manpower, and achieve the effect of avoiding losses

Active Publication Date: 2013-07-03
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method requires a huge amount of money and manpower, and has an impact on the environment
And in some old well bodies, excessive mechanical force will cause damage to the well pipe and affect production capacity
On the other hand, derricks and drilling machinery need to be erected to remove scales on the well wall, and production must be stopped, which will lead to increased production costs

Method used

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Examples

Experimental program
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Embodiment Construction

[0075] The preferred embodiment is hereby described with reference to the accompanying drawings.

[0076] Please refer to figure 1 , figure 2 . The downhole cleaning device 100 of the first embodiment of the present invention includes a weighted rod 110 , two centerers 120 , a bearing assembly 130 , an impeller 140 and a plurality of scraping assemblies 150 .

[0077] The weighting rod 110 is made of stainless steel (Stainless Steel 316L), or a material with a higher corrosion resistance than the former, with an outer diameter of about 5 cm and a length of about 2 meters. The weight bar 110 includes a first portion 111 and a second portion 115 . The first part 111 includes a body 112 and a connecting portion 113 . The body 112 is connected to a winch (not shown) on the ground through a steel cable, and the position of the downhole clearing device 100 is controlled by the winch. The body 112 includes a plurality of sliding grooves 114 fixed on the surface of the body 112 ...

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PUM

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Abstract

The invention provides a downhole cleaning device, comprising: a weight bar, an impeller, a plurality of scraping assemblies, two groups of centering devices, and a bearing assembly. The impeller includes an impeller inner ring, a plurality of main rotor blades and an outer ring. The main blades surround the impeller inner ring, the impeller outer ring is connected on the main blade tip. The scraping assemblies are disposed outside the outer ring of the impeller. The two groups of centering devices are arranged on the upper and lower sides the impeller along the longitudinal direction of the weight rod. The bearing assembly connects between the inner ring and the impeller, wherein the impeller assembly rotates around the weight bar through the bearing assembly.

Description

technical field [0001] The invention relates to a downhole cleaning device, in particular to a downhole cleaning device driven by fluid flow. Background technique [0002] In water wells, oil and gas wells or geothermal wells, substances or ions in the fluid gradually adhere to the pipe wall or well wall through years of flow, pressure drop changes or temperature effects. With the increase of time, the hardness and thickness of scales also continue to increase, causing well pipe blockage or pipe wall corrosion. For example, during the production of geothermal wells, calcium carbonate is rapidly formed on the well wall and hardens with time, causing pipe wall blockage and affecting productivity. [0003] The methods for removing scales on the well wall in the known technology include: mechanical well washing, acid treatment and chemical inhibitors. The above-mentioned method requires a huge amount of money and manpower, and has an impact on the environment. And in some old...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/02E21B17/10F03B13/00F03B3/12
CPCY02E10/20
Inventor 刘力维谢瑞青郭泰融柳志锡
Owner IND TECH RES INST