Double-cylinder compression packer

Abstract

The invention discloses a double-cylinder compression packer. The double-cylinder compression packer comprises a center pipe. The center pipe is sequentially sleeved with an upper connector, an upper hydraulic cylinder, an upper starter, an upper piston, an upper impelling ring, an upper moving ring, an upper pressing ring, an upper rubber barrel, a spacer ring, a lower rubber barrel, a lower pressing ring, a lower moving ring, a lower impelling ring, a lower piston, a lower starter, a lower hydraulic cylinder and a lower connector from top to bottom. Instant impact force in the setting process of the compression packer is buffered by arranging end portion copper rings and elastic steel rings at the two ends of the upper rubber barrel and the two ends of the lower rubber barrel to prevent parts of the compression packer from being damaged by the instant impact force so that sealing pressure of the upper rubber barrel and the lower rubber barrel on a casing pipe is more even, and the service life of the compression packer is prolonged. Because a saw-tooth-shaped structure is arranged on the center pipe, the upper rubber barrel and the lower rubber barrel can be effectively prevented from wriggling in the working process. Rubber barrel frameworks are arranged on the upper rubber barrel and the lower rubber barrel in a sulfuration mode and are provided with saw-tooth-shaped structures, so that the upper rubber barrel and the lower rubber barrel are prevented from being damaged in the setting and sealing processes of the compression packer, and the elastic restoring force of the upper rubber barrel and the elastic restoring force of the lower rubber barrel are increased in the release process of the compression packer.

Description

technical field [0001] The invention relates to a packer, in particular to a double-cylinder compression packer for oil and gas development. Background technique [0002] With the increasing number of deep wells, extended-reach horizontal wells and multilateral wells, the requirements for downhole tools including packers are getting higher and higher. The currently used hydraulic packer has a long rubber tube, and after the packer is set, the shoulder of the rubber tube protrudes seriously, causing the shoulder of the rubber tube to rupture due to stress concentration, so the sealing pressure of the rubber tube is low and the service life is not long , the packing effect of the packer is not good. [0003] After the packer is set, due to the complicated stress on the packer, it is easy to cause the rubber tube of the packer to wriggle and cause the packer to lose its sealing effect. Contents of the invention [0004] The purpose of the present invention is to overcome th...

AI Technical Summary

Problems solved by technology

The currently used hydraulic packer has a long rubber tube, and after the packer is set, the shoulder of the rubber tube protrudes seriously, causing the shoulder of the rubber tube to rupture due to stress concentration, so the sealing pressure of the rubber tube is low and the service life is not long , the packing effect of the packer is not good

[0003] After the packer is set, due to the complex force of the packer, it is easy to cause the packer rubber tube to wriggle and cause the packer to lose its sealing effect

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