High-strength high-permeation sand filtering pipe suitable for highly-deviated and high-argillaceous well and preparation method

Abstract

The invention discloses a high-strength high-permeation sand filtering pipe suitable for a highly-deviated and high-argillaceous well. The sand filtering pipe comprises a protection sleeve and a high-strength resin sand blocking layer, wherein the protection sleeve is provided with sieve pores which are through in the radial direction, a supporting framework is arranged in the high-strength resin sand blocking layer, the whole high-strength resin sand blocking layer is tubular and is arranged in an inner cavity of the protective sleeve, an annular space is formed by the outer wall of the high-strength resin sand blocking layer and the inner wall of the protective sleeve, the supporting framework comprises a plurality of annular supporting transverse ribs and a plurality of supporting longitudinal bars, the supporting transverse ribs are uniformly arranged from top to bottom, the supporting longitudinal bars are evenly and vertically welded to all the supporting transverse bars, the supporting transverse bars and the supporting longitudinal bars are welded into a whole to form a cylindrical cage frame, and the supporting framework and the high-strength resin sand blocking layer are fixedly connected into an integrated structure. The sand filtering pipe is high in strength, high in permeability and strong in anti-scouring capacity, and can meet the requirements of sand prevention and liquid extraction of highly-deviated wells. The invention discloses a preparation method. The preparation method is very convenient.

Description

technical field [0001] The invention relates to the technical field of downhole sand control tools for petroleum exploitation, in particular to a high-strength and high-permeability sand filter pipe suitable for high-inclination and high-shale wells and a preparation method thereof. Background technique [0002] The unconsolidated sandstone reservoirs of Zhuangxi Oil Production Plant in Shengli Oilfield have great differences in reservoir physical properties, high shale content, shallow build-up points, large well inclination angles, poor injection-production correspondence, and insufficient formation energy supplementation in directional deviated wells. Affected by high shale content, fracturing sand control or filling sand control costs are high and production is seriously reduced; sand control costs are low when resin sand filter tubes are used, and conventional resin sand filter tubes use protective sleeves with side flow holes, which are affected by large oil well inclin...

AI Technical Summary

Problems solved by technology

[0006] has the following defects: the center pipe of the sand filter tube is limited by the number of well holes, and the liquid production rate after sand control is low, which cannot meet the liquid extraction requirements

[0008] has the following defects: some oil wells have non-uniform fluid discharge from blastholes, resulting in local puncture of sand filter pipes

[0009] At present, the known sand filter pipe adopts the protective casing of side flow holes. Due to the influence of large oil well inclination and irregular wellbore trajectory, etc., the sand filter during the running process The pipe is easily damaged due to extrusion, the sand control strength is low, and oil wells with high mud content are likely to cause mud to block the side flow holes

The center pipe of the sand filter tube is limited by the number of well holes, and the liquid production rate after sand control is low, which cannot meet the liquid extraction requirements

Some oil wells have uneven fluid discharge from blastholes, resulting in local puncture of sand filter pipes

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