Self-seal-examining slip packer

Abstract

The invention relates to a self-seal-examining slip packer, and belongs to the field of oil-gas well operation downhole tools. The packer is composed of an inner center tube, an outer center tube, a slip and a slip sheath; an upper connector is installed at one end of the inner center tube through threads, a lower connector is installed at the other end of the inner center tube through threads, an inner piston sleeve, a releasing claw and the outer center tube are sequentially installed on the portion, between the upper connector and the lower connector, of the inner center tube, a balance connector is installed at one end of the inner piston sleeve through threads, an upper lining and a lower lining are sequentially installed on the portion, at the other end of the balance connector, of the inner piston sleeve, and a bypass connector is arranged between the upper lining and the lower lining; an upper guide ring is installed on the portion, at one side of the bypass connector, of the upper lining. Double packer element sealing is adopted in the packer in the setting process, sealing performance in the setting process is ensured, and the self-seal-examining slip packer is safer and more reliable, has the advantages of being easy and fast to operate and meets the requirement for blocking and partitioning an oil-string casing in oil field production.

Description

Technical field [0001] The invention relates to a self-inspection sealing slip packer, which belongs to the field of oil and gas well downhole operation tools. Background technique [0002] With the deepening of oilfield development, many oil wells are in the high water-cut development period, and the oil layer casing is corroded seriously, and there are often multiple perforations and long-distance leakage problems, which increase the difficulty of oil and gas production. [0003] In order to solve the problem of casing perforation in the oil layer and reduce oilfield losses, water blocking packers are mainly used to seal and separate the oil layer casing, and then use auxiliary technologies such as casing tieback and expansion pipe subsidies to repair the oil layer casing. . However, because the existing water plugging packer only has a single set of rubber cartridges for setting and there is no device for testing the setting effect in the water plugging packer; during construct...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-inspection sealing slip with a compact structure, which has the function of inspection and sealing, and can realize one-time sealing operation, so as to solve the problems of high cost, long cycle and poor technicality of the existing packer Packer

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