Expansion screen pipe

Abstract

The invention provides an expansion screen pipe which comprises an inner layer pipe, a middle layer pipe and an outer layer pipe, wherein the inner layer pipe, the middle layer pipe and the outer layer pipe are fixed and mounted in a sleeved mode in sequence from inside to outside. Multiple kerfs are distributed in the pipe wall of the inner layer pipe, the middle layer pipe is formed by coiling filaments spirally, and multiple holes are also distributed in the pipe wall of the outer layer pipe. The expansion screen pipe has the advantages that the granulometric class of filtered gravel can be controlled accurately, an oil drainage area is enlarged through expansion hole enlargement, oil flow resistance is reduced at the same time, and crude oil produced by a single well daily can be improved by 30-50 percent.

Description

Technical field [0001] The invention belongs to the field of petroleum exploitation, and particularly relates to an expansion screen. Background technique [0002] At present, in the field of oil exploration, all traditional screens are used. The traditional screens have a small oil drainage area, large oil flow resistance, low screen structure stiffness, easy collapse and damage, and cementing quality cannot be guaranteed. If the space left between the surface and the inner wall of the casing is too large, gravel packing is required, and gravel packing is a high-cost and variable-quality process. Expandable Sand Screen (Expandable Sand Screen,) is an emerging sand control technology. Sand control screens are expanded and expanded during underground construction. This technology was first applied in the Thayfut 5 well in Oman. After it was put into production, the sand removal effect was confirmed. Although spread to all parts of the world, including North Sea, Southeast Asia and...

AI Technical Summary

Problems solved by technology

However, the expansion process cannot control the filtration gap. Generally, the gap needs to be enlarged several times, which may fail to achieve the expected sand removal purpose.

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