Sand screen pipe used for sand-preventing technology

Abstract

The invention discloses a sand filter pipe used in a sand control process, which comprises an expansion pipe, a filter medium, a protection pipe, a fishing head, an expansion mechanism, an unhanging mechanism and an anchoring mechanism. The expansion mechanism mainly includes oblique seam expansion pipe and oblique seam protection pipe; the unhooking mechanism mainly includes salvage head, upper hanging nipple, lower hanging sleeve, shear nails and steel ball; the anchoring mechanism mainly includes slip seat, conical wedge and clip watt. An expansion tube is connected to the fishing head, an expansion ring is installed on the expansion tube, and expansion ribs are arranged between the expansion tube and the expansion tube at the oblique seam. The invention is mainly used in the sand control technology of oil exploitation.

Description

technical field [0001] The invention relates to a method or equipment for extracting oil, gas and water from a well, in particular to a sand filter pipe used in a sand control process. Background technique [0002] In April 1999, the magazine "Foreign Petroleum Machinery" published an article "Expandable screen provides a new option for sand control", which disclosed an expandable sand filter whose structure is composed of three layers of materials , the inner layer is a slotted base pipe, the middle is a filter medium, and the outer layer is an expandable protective tube. wall, and then raise the expanding cone. However, this kind of sand filter tube has problems such as large force applied during construction and inability to retract after post-processing, which makes it difficult to use conveniently on site. Contents of the invention [0003] The object of the present invention is to overcome the shortcomings of the prior art and provide a sand filter tube for sand co...

AI Technical Summary

Problems solved by technology

However, this kind of sand filter tube has problems such as large force applied during construction and inability to retract after post-processing, which makes it difficult to use on site.

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