Sand control sieve tube

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...

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 filter pipes, wire-wrapped screens, cutting Although these mechanical sand control methods have certain advantages, most of them are not suitable for the sand control tasks of oil wells with severe sand production in the middle and late stages or oil wells that have undergone multiple sand control operations.

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