Branched well screen pipe anchoring compensation device

Abstract

The invention discloses a branched well screen pipe anchoring compensation device. The pipe anchoring compensation device consists of a hydraulic set packing part, a releaser part, a compensation part and an anchoring part; and four main functions of a double-stage hydraulic cylinder, rotary anchoring, lifting or rotation of the releaser and drilling compensation of a sleeve are realized in the device. According to the anchoring compensation device, the whole branched well screen pipe string is anchored in a borehole by using four powerful anchor flukes, so that the screen pipe string is prevented from moving to the main borehole from the branched well borehole in later production, and tripping-in of the production pipe column in the main borehole is prevented from affecting the production of an oil well. Through the pipe anchoring compensation device, the screen pipe in the branched well borehole plays a role in supporting the well wall and preventing sand, the service life of the branched well borehole can be prolonged, and the yield of a single well is improved.

Description

technical field [0001] The invention relates to a completion tool for fishbone branch wells in oil and gas reservoirs, in particular to a screen pipe anchor compensation device for branch wells. Background technique [0002] The fishbone branch well technology is a landmark technology in the drilling field in the 21st century, and its core is the fishbone branch well completion technology based on the research of well completion tools. Yubone well is a kind of branch well with a special shape. Its main wellbore usually extends horizontally parallel to the oil layer. Each branch wellbore is drilled laterally from the main wellbore. The spatial distribution of each branch hole is basically the same as that of the main wellbore. In the oil layer, the length of the lateral wellbore is shorter than that of the main wellbore. Fishbone branch wells can obtain the maximum total horizontal displacement from one wellbore, and drill multiple sets of oil and gas layers at different dep...

AI Technical Summary

Problems solved by technology

[0004] The existing fishbone lateral well screen completion technique is to run the screen into the lateral wellbore, and the top of the screen is not anchored by an anchor device, which cannot prevent the screen from sliding due to gravity, causing the screen in the lateral wellbore to fall. Without the effect of supporting the well wall and sand control, the service life of branch wells is shortened, and the purpose of increasing single well production cannot be achieved

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