Double cylinder compression packer

Abstract

The invention discloses a double-cylinder compression packer, which comprises a center pipe, on which an upper joint, an upper liquid cylinder, an upper starter, an upper piston, an upper propulsion ring, an upper moving ring, Upper pressure ring, upper rubber cylinder, spacer ring, lower rubber cylinder, lower pressure ring, lower moving ring, lower push ring, lower piston, lower starter, lower liquid cylinder and lower joint, passing through both ends of the upper and lower rubber cylinders The copper ring and elastic steel ring at the end are set to buffer the instantaneous impact force during the setting process of the packer to prevent damage to the packer parts by the instantaneous impact force, so that the sealing pressure of the upper and lower rubber cylinders on the casing is more uniform, Extended service life. By setting the zigzag structure on the center tube, the creeping of the upper and lower rubber cylinders can be effectively prevented. The upper and lower rubber barrels are vulcanized on the rubber cartridge skeleton, and a zigzag structure is set on the rubber cartridge skeleton, so as to protect the upper and lower rubber cartridges from being damaged during the packer setting and sealing process. Increase the elastic recovery force of the upper and lower rubber cylinders.

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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