Straight slit trapezoidal self-cleaning screen pipe

Abstract

The invention relates to a straight slit trapezoidal self-cleaning screen pipe which comprises a base pipe and a filter piece; the filter piece is arranged in a filter hole on the side wall of the base pipe, and comprises a filter element and a protective cover; the filter element comprises an upper fixing ring, a lower fixing ring and a plurality of trapezoidal filter strips; the filter strips are arranged between the upper and the lower fixing rings with equal spacing; the top of each filter strip is a plane, the bottom thereof is a circular arc-shaped surface, and both sides thereof are inclined surfaces which are folded inwards symmetrically; the top of the front end and the rear end of each filter strip are fixedly connected on the bottom surface of the upper fixing ring by hot pressing, and the bottom thereof is fixedly connected on the top surface of the lower fixing ring; and the protective cover is covered at the upper part of the filter element, the protective cover is screwed on the inner wall of the filter hole through an external-threaded screw thread, and the top surface of the protective cover is provided with a through hole. The self-cleaning screen pipe has the advantages of simple assembly, easy manufacturing, small difficulty in construction operation, trapezoidal straight filter joint, appropriate joint size, high permeability, high sand blocking precision,no easy blockage, automatic blockage removal capability and long service life.

Description

technical field [0001] The invention relates to a mechanical sand control device used in crude oil exploitation in the petroleum industry, in particular to a sand control screen. Background technique [0002] At present, sand control screens are generally used in the oil and gas industry for downhole sand control. The various sand control equipment commonly used at present often have a short effective period of sand control and high operating costs. From the earlier slotted screens and wire-wound screens to the recent various composite screens and expansion screens, the slotted screens have small infiltration area, wide slots, and low permeability. Poor strength, short service life, difficult construction work, poor filtering accuracy of composite screen, easy to block, low strength, expensive operation cost of expansion screen, poor filtering accuracy, and easy to block. Contents of the invention [0003] In order to solve the above problems, the object of the present in...

AI Technical Summary

Problems solved by technology

[0002] At present, sand control screens are generally used in the oil and gas industry for downhole sand control. The sand control equipment commonly used at present often has a short effective period of sand control and high operating costs.

From the earlier slotted screens and wire-wound screens to the recent various composite screens and expansion screens, the slotted screens have small infiltration area, wide slots, and low permeability. Poor strength, short service life, difficult construction, poor filtering accuracy of composite screen, easy to block, low strength, expensive operation cost of expansion screen, poor filtering accuracy, and easy to block

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