Self-expanding thermal mining open hole metal packer

Abstract

The invention discloses a self-expanding thermal extraction open-hole metal packer. The self-expanding thermal extraction open-hole metal packer includes a central tube, and an upper joint and a lower joint which are connected to the upper end and the lower end of the central tube respectively; a metal rubber sleeve and a force application mechanism for performing force application and seat sealing on the metal rubber sleeve are arranged on the outer wall of the central tube; the metal rubber sleeve includes an upper section, a middle section and a lower section, the middle section is an arc barrel, and a rubber material is filled in the inner cavity of the arc barrel at the middle section; and the force application mechanism includes a cylinder sleeve, a piston, and an outer cylinder, wherein a thermal expansion material is arranged in a sealed space between the upper end of the piston and the cylinder sleeve, and the lower end of the piston is pressed against the upper end surface of a compression ring. the rubber sleeve is made of metal and rubber, in this way, the problem that the expansion and seal performance of the metal is poor and the service life of the rubber material is short in a steam injection well can be solved; and the expansion force of the thermal expansion material at the high temperature can serve as a seat sealing power of the rubber sleeve, the seat sealing manner is simple and effective, the reliability of the thermal extraction horizontal well open-hole metal packer can be improved, and the thermal extraction horizontal well completion technology is further improved.

Description

technical field [0001] The invention relates to a packer, in particular to a self-expanding open-hole metal packer for thermal recovery. Background technique [0002] The isolation of open hole packers has always been a major problem in the implementation of selective well completion and staged completion of heavy oil horizontal wells. The high temperature during steam injection in thermal recovery horizontal wells has become a major bottleneck restricting open hole packers . Under the high temperature of steam injection, the rubber material rubber tube will carbonize and fail in a short time, and it is difficult to maintain good sealing performance for a long time. Once it fails, it will cause the failure of staged steam injection and seriously affect the thermal recovery packer. efficiency. In addition, the setting method of the thermal recovery packer we are currently using is more complicated, the operation cost is higher, and the construction is more cumbersome, which...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a self-expanding open-hole metal packer for thermal recovery, which uses metal and rubber combined rubber sleeves, which solves the problems of poor sealing performance of metal expansion and short service life of rubber materials in steam injection wells. And the expansion force of the thermal expansion material at high temperature is used as the setting power of the rubber tube. The setting method is simple and effective, which improves the reliability of the open hole packer of the thermal recovery horizontal well and further improves the completion process system of the thermal recovery horizontal well.

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