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Annular self-filling sand control screen

A technology for sand control screens and sand layers, which is applied in wellbore/well components, production fluids, earthwork drilling and production, etc. It can solve the problems of complex construction process, high cost, and poor sand control effect, and achieve high bond strength and low cost. Low, the effect of preventing well wall collapse

Active Publication Date: 2021-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the mechanical sand control completion method either has the problem of poor sand control effect, or has the problem of complicated construction technology and high cost

Method used

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  • Annular self-filling sand control screen
  • Annular self-filling sand control screen

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereby.

[0035] figure 1 The overall structure of the annulus self-filling sand control screen 10 before expansion is schematically shown in the embodiment of the present invention. figure 2 It schematically shows the overall structure of the annular self-filling sand control screen 10 in the embodiment of the present invention after expansion.

[0036] like figure 1 and figure 2 As shown, the annular self-filling sand control screen 10 according to the embodiment of the present invention includes a base pipe 1, a sand retaining layer 2 and a snap ring 3. Wherein, the sand retaining layer 2 is sheathed on the base pipe 1 , and the sand retaining layer 2 is fixed at both ends of the base pipe 1 through snap rings 3 . The base pipe 1 is provided with uniformly arrang...

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Abstract

The invention provides an annular self-filling sand control screen. The annular self-filling sand control screen comprises a base tube, sand blocking layers and clamping rings, wherein the sand blocking layers are arranged on the base tube in a sleeving mode and fixed to the two ends of the base tube through the clamping rings. First circulating holes are evenly formed in the base tube, and gaps used for fluid circulation are formed between the sand blocking layers and the base tube. Each sand blocking layer comprises a framework material made of polyurethane foam and a hot melt adhesive material repeatedly soaked in the framework material, and therefore compressible composite foam is formed. The annular self-filling sand control screen is good in sand control effect, simple in construction process and low in cost.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well completion, and in particular relates to an annulus self-filling sand control screen. Background technique [0002] At present, the commonly used sand control techniques for oil and gas wells at home and abroad are mainly divided into chemical sand control and mechanical sand control, among which mechanical sand control is the most widely used sand control method. In the prior art, the mechanical sand control completion method either has the problem of poor sand control effect, or has the problem of complicated construction technology and high cost. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an annulus self-filling sand control screen with good sand control effect, simple construction technology and low cost. [0004] In order to solve the problems of the technologies descri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/08
CPCE21B43/086
Inventor 丁士东段友智侯倩岳慧刘欢乐艾爽秦星
Owner CHINA PETROLEUM & CHEM CORP
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