Sand control sieve tube

A sand control screen and sand control technology, which is applied in the field of filter screen or liner, can solve the problems of incompetence, sand control strength and validity period limitation, etc., and achieve the effect of strong adaptability and good sand control effect

Inactive Publication Date: 2013-02-06
SHAANXI HI TECH ENERGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of chemical sand control is that it does not affect the implementation of various operational measures, but the sand control strength and validity period are limited; mechanical sand control methods are commonly used in oil fields, and common mechanical sand control methods include sand filt

Method used

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  • Sand control sieve tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Such as figure 1 As shown, the sand control screen of the present invention is composed of a multi-layer tubular structure.

[0013] The outermost layer is the protective shell layer 3. Its function is to protect the inner structure of the sand control screen from damage during transportation and construction; Take off, play the role of equalizing expansion force.

[0014] The part inside the protective shell layer 3 is the roll-out expandable sand control screen layer 2, which can expand and expand outward under the pushing action of the gravel packing layer 1, and initially filter the crude oil to form a primary sand-retaining barrier; at the same time , to block the expansion of the gravel in the screen tube, and initially filter the crude oil to form a primary sand-retaining barrier; at the same time, prevent the leakage of the gravel from the pores of the protective shell during the expansion of the screen tube.

[0015] The middle part is the gravel packing laye...

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PUM

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Abstract

The invention provides a sand control sieve tube and relates to a filter screen or a liner tube for extracting oil, gas, water, soluble substances or meltable substances or mineral mud from a well. The sand control sieve tube consists of a multilayer tubular structure; and the multilayer tubular structure contains a protective shell layer, a sand control screen layer, a gravel packing layer and a slotted sieve tube layer from outside to inside in sequence. The sand control sieve tube has the benefits that a micro-fine composite cavity slotted sieve tube is taken as a non-expandable inner supporting tube, the expansion of the sieve tube is realized by using a method of filling and extruding gravel carried in high-pressure liquid, the zero annulus of a whole expansion section is realized, the adaptability is strong, and the sand control effect is good.

Description

technical field [0001] The present invention relates to a screen or liner for producing oil, gas, water, soluble or meltable substances or mineral slurries from wells. Background technique [0002] Sand production in oil and gas wells is currently an important problem that plagues the development of unconsolidated sandstone reservoirs. It not only easily causes sand buried oil layers, pump stuck accidents, and aggravates the wear and tear of ground and downhole equipment, but also causes well wall collapse in severe cases, causing casing damage and Oil well scrapped. [0003] At present, the commonly used oil well sand control technology at home and abroad is mainly divided into two categories: chemical sand control and mechanical sand control. The advantage of chemical sand control is that it does not affect the implementation of various operational measures, but the sand control strength and validity period are limited; mechanical sand control methods are commonly used in...

Claims

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Application Information

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IPC IPC(8): E21B43/08
Inventor 王耀斌
Owner SHAANXI HI TECH ENERGY DEV
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