Integrated oil and gas reservoir protection tool assembly

Abstract

The invention discloses an integrated oil and gas reservoir protection tool assembly. The integrated oil and gas reservoir protection tool assembly is composed of a working barrel, a running tool, a formation isolation valve, a connection tool, a suspension packer and a switch tool. The working barrel, the formation isolation valve, the connection tool and the suspension packer are integrally connected through threads. The running tool is arranged in the working barrel and penetrates through the formation isolation valve. The lower end of the running tool is connected with the switch tool through threads. The integrated oil and gas reservoir protection tool assembly has the advantages that the integrated oil and gas reservoir protection tool assembly can be put into an oil and gas reservoir along with a sand control pipe pillar and achieve the disengagement function of the running tool, the formation isolation valve and the connection tool; leakage and losses of completion liquid generated in the well completion and workover processes, and thus the oil and gas reservoir is protected from being contaminated; operation efficiency can be improved, the well completion cost is lowered, the difficulty in later workover processing is lowered, and blowout and well kick and other accidents are prevented; the suspension packer and the formation isolation valve are replaced conveniently in the maintenance process.

Description

technical field [0001] The invention relates to the technical field of oilfield development and production, more specifically, the invention relates to an oil and gas reservoir protection tool assembly used for oilfield development and production. Background technique [0002] With the development of the offshore oil industry, the operational timeliness, operating cost and operational safety of oilfield development and production have become more and more key issues, especially in the process of well completion and workover operations, oil and gas reservoir protection tools play an extremely important role effect. [0003] During well completion and workover operations, in order to prevent blowout, well kick and other phenomena, it is necessary to continuously inject completion fluid into the wellbore. It will increase the completion cost; in addition, if the density and injection volume of the completion fluid are not enough, the oil and gas well will fail to kill the well...

AI Technical Summary

Problems solved by technology

[0004] At present, the international mainstream oil and gas reservoir protection technology is relatively mature, but because the oil and gas reservoir protection tool used is connected to the lower part of the hanging packer, once the reservoir protection valve fails, it must be connected with the hanging packer and its The lower part of the pipe string is all pulled out, so the post-processing is quite complicated; the oil and gas reservoir protection tools used in China are mostly sliding sleeves and simple flap valves, although spherical oil and gas reservoir protection tools have been developed in recent years. , but its safety and effectiveness are poor, and the post-workover treatment is also very difficult

So far, no technical solution has been found to install the oil and gas reservoir protection tools on the upper part of the suspension packer and only replace the oil and gas reservoir protection tools without moving the lower string during post-processing

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