Compression distance measurable packer

Abstract

The invention discloses a compression distance measurable packer. A center pipe (10) and a rubber barrel shaft (11) are included. The compression distance measurable packer is characterized in that the outer surface of the center pipe (10) is coated with a coating (100); the sum of the thickness of the coating (100) and the diameter of the center pipe (10) is larger than the hole diameter of an inner hole of the rubber barrel shaft (11); and the problem that an existing packer cannot measure the compression distance is solved.

Description

technical field [0001] The invention relates to an oilfield downhole tool, in particular to a packer. Background technique [0002] During the production process of oil field test wells, downhole tubing strings failed. During the fault analysis process, some of the faults were suspected to be due to downhole leakage. However, after pulling out the downhole tubing strings in the suspected failure wells, it was found that other downhole tools had no problems, and the packer was also damaged. If no other problems are found, the leak may be caused by insufficient compression of the packer. [0003] Because the packer used in other wells can be tested to verify whether the packer is sealed, but the test well cannot be tested, and the seal cannot be checked by conventional methods. [0004] The commonly used packer has no trace after compression, so it cannot be judged by the pipe string that has been pulled out. Only by accurately measuring the compression distance of the rubber...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a packer with measurable compression distance, which solves the problem that the existing test well packer cannot measure the compression distance of the rubber cylinder

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