Foam metal composite sand prevention structure and liquid extracting pipe

A foam metal and sand control technology, which is applied in the fields of production fluids, wellbore/well components, earthwork drilling, etc., can solve the problems of poor filter layer permeability and poor diversion effect, and achieve good sand control effect and improve sand control. Effect and production efficiency, the effect of strong sand holding capacity

Inactive Publication Date: 2011-10-19
PETROCHINA CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

On this basis, the present invention also solves the problem that the filter layer made of existing metal materials has poor permeability and poor diversion effect.

Method used

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  • Foam metal composite sand prevention structure and liquid extracting pipe
  • Foam metal composite sand prevention structure and liquid extracting pipe
  • Foam metal composite sand prevention structure and liquid extracting pipe

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Experimental program
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Embodiment Construction

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0034] like figure 2 and image 3 As shown, the present invention proposes a metal foam composite sand control structure. The metal foam composite sand control structure is sleeved outside the base pipe 1. The metal foam composite sand control structure at least includes: a metal foam sand control layer made of metal foam.

[0035] The manufacturing process of the metal foam sand control layer includes: conductively treating polyurethane sponges with different porosities, depositing metal on the sponges through electrodeposition, sintering at high temperature to strengthen the electroplating layer and burning the sponges. The manufacturing process of metal foam is already a prior art, and will not be repeated here. The metal f...

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Abstract

The invention provides a foam metal composite sand prevention structure and a liquid extracting pipe. The foam metal composite sand prevention structure is sleeved outside a basic pipe and at least comprises a foam metal sand prevention layer made of foam metal. The liquid extracting pipe comprises the basic pipe and the foam metal composite sand prevention structure which is sleeved outside the basic pipe. The sand prevention structure has the sand prevention effect of a gravel filling process, the structural strength of a wire-wound metal mesh, high sand tolerance capacity, low overflow resistance, and a good prevention effect on sand grains with the grain size of more than 60mu m; and when the sand prevention structure is matched with a well cleaning process, a pipe column is not required to be moved for well cleaning, so that the sand prevention effect is further enhanced.

Description

technical field [0001] The invention relates to a sand control tool for an oil well or a water well, in particular to a foam metal composite sand control structure formed on the outer layer of a base pipe by composite foam metal and a liquid extraction pipe with the structure. Background technique [0002] During oil production, it is usually necessary to set various sand control layers outside the base pipe to achieve the purpose of sand control. At present, the commonly used mechanical sand control technology in oilfields includes gravel packing sand control technology, wire-wrapped screen sand control technology, screen sand control technology, metal sintered microporous material sand control technology and metal fiber porous block sand control technology, etc. Among them, the gravel filling process has shortcomings such as short effective life, complicated construction, and inability to backwash due to loose gravel and loose arrangement. The wire-wound pipe sand control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/08
Inventor 刘合裴晓含刘敏陈琳程心平石白茹郑立臣
Owner PETROCHINA CO LTD
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