Retrievable rubber sleeve anti-protrusion mechanism used under high temperature and high pressure

Abstract

The invention discloses a retrievable rubber sleeve anti-protrusion mechanism used under high temperature and high pressure. The retrievable rubber sleeve anti-protrusion mechanism comprises supporting blocks and limiting supporting blocks, wherein the supporting blocks and the limiting supporting blocks are hinged alternately in sequence to form a ring. The supporting blocks and the limiting supporting blocks on two sides of the supporting blocks are jointly penetrated by a guide rod so as to be hinged, and the parts, located on two sides of each supporting block, of the guide rod are sleevedwith a left-handed cylindrical helix torsion spring and a right-handed cylindrical helix torsion spring respectively. Torsion arms at one ends of the left-handed cylindrical helix torsion springs andthe right-handed cylindrical helix torsion springs are located in the supporting blocks, while torsion arms at the other ends are located in the limiting supporting blocks on two sides of the supporting blocks, and the left-handed cylindrical helix torsion springs and the right-handed cylindrical helix torsion springs are alternately distributed in sequence on the ring. The retrievable rubber sleeve anti-protrusion mechanism used under high temperature and high pressure can achieve outer-diameter contraction and expansion, and solves the problems that a retrievable rubber sleeve in the priorart protrudes and is pricked to leak during high-temperature and high-pressure sealing, and working pressure of a retrievable packer is increased.

Description

technical field [0001] The invention belongs to the technical field of downhole testing tools for petroleum and natural gas, and relates to a recyclable rubber cartridge anti-burst mechanism for high temperature and high pressure. Background technique [0002] The anti-shock mechanism of the rubber cartridge is the key to improving the sealing performance of the rubber cartridge. At present, there are three main forms of the anti-burst mechanism of the high-temperature and high-pressure rubber cartridge: a combination of bowl-shaped metal rings, a spring structure on the shoulder of the rubber cartridge on the end face, and a wire mesh structure; [0003] The bowl-shaped metal ring combination mechanism has reliable anti-outburst performance on the rubber cartridge, but since the outer diameter of the metal ring can not be recovered after being stretched, it can only be used in non-recoverable rubber cartridges, and is mostly used in permanent packers; [0004] The spring st...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-temperature and high-pressure recyclable rubber cartridge anti-protrusion mechanism, which can realize shrinkage and expansion of the outer diameter, and solve the problem of protrusion and puncture leakage of the recyclable rubber cartridge in the prior art when it is sealed at high temperature and high pressure. Increase working pressure of recoverable packer

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