Blowby checking packer

Abstract

The invention relates to a blowby checking packer comprising a central tube. An upper central tube and a joint are in threaded connection with the two ends of the long axis direction of the central tube correspondingly; an upper joint is in threaded connection with the outer end part of the long axis direction of the upper central tube; and a pressing cap, a rubber copper seat and a self-sealing rubber cylinder are further sequentially mounted on the outer side of the upper central tube in a sleeving mode; a cone body and a piston body are sequentially mounted on the outer side, located between the self-sealing rubber cylinder and the joint, of the central tube in a sleeving mode; the outer side of the piston body is further in threaded connection with a cylinder sleeve, and the end, closeto the cone body, of the cylinder sleeve is further in threaded connection with an outer cover; the interior of the joint is in threaded connection with a filter tube and a lower central tube in sequence, and the outer end part of the filter tube is further in threaded connection with a rubber cylinder sleeve A; the section, close to the outer end part of the lower central tube, is further in threaded connection with a rubber cylinder sleeve B; and a rubber cylinder is further mounted between the rubber cylinder sleeve A and the rubber cylinder sleeve B in a sleeved mode. The blowby checkingpacker has the advantages that the self-sealing effect of the packer can be verified, and the accuracy of checking blowby of a production layer section and the broken position of a casing pipe throughthe packer is effectively ensured.

Description

technical field [0001] The invention is a plugging tool used for sealing off lower oil, gas and water layers in mines such as oil wells and gas wells, and particularly relates to a channeling inspection packer. Background technique [0002] In the process of oilfield development, some oil and water wells are affected by comprehensive factors such as cementing quality, perforation vibration, casing corrosion, oil layer sand production, and repeated fracturing, resulting in mutual leakage between production intervals and casing damage. Lead to ineffective measures or inefficient mining. In order to accurately find the location of leakage in production intervals and casing damage, it is necessary to block the location of leakage in production intervals and casing damage, and check through ground pressure testing. The packer is a necessary tool in the process of checking the leakage of the production interval and casing damage. The packer is located between the oil pipe and the...

AI Technical Summary

Problems solved by technology

[0003] At present, the structure of the packer generally includes a joint. The filter tube and the center pipe are threaded in sequence in the joint 1, and there is a certain gap between the filter pipe and the center pipe; There is also a sealing ring between the filter tube and the inner end of the threaded connection of the rubber sleeve A, and the other end of the rubber sleeve is threaded with the central pipe; there is a rubber sleeve B in a threaded connection near the outer end of the central pipe , and there is also a sealing ring between the central tube and the inner end of the threaded connection of the rubber sleeve B; a rubber sleeve is also set between the rubber sleeve A and the rubber sleeve B, and the two ends of the rubber sleeve are respectively connected to the rubber sleeve A is threadedly connected with the rubber sleeve B. When the packer with this structure is used for the fishing test, there are mainly the following problems: the packer with this structure cannot verify whether there is leakage in itself, and then check the channeling in the production interval. When leaking and casing damage, it cannot be accurately judged whether it is leakage in the production interval and casing damage, or the leakage of the packer itself, which will affect the inspection results of leakage in the production interval and casing damage

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