High-temperature and high-pressure resistant multi-stage fracturing acidizing packer

Abstract

The invention discloses a high-temperature and high-pressure resistant multi-stage fracturing acidizing packer which comprises a central pipe, a setting assembly, a clamping assembly and a heat dissipation assembly. The setting assembly completes setting under the action of oil pressure, the clamping assembly is positioned on the lower part of the central pipe and is used for preliminarily fixingthe relative positions of the central pipe and an oil pipeline, and the heat dissipation assembly is arranged on the outer wall of the setting assembly and absorbs heat for cooling in a high-temperature state. The anti-high-temperature and high-pressure multi-stage fracturing acidizing packer has the beneficial effects of bidirectional clamping, high-temperature heat dissipation and multi-radius floating ball oil resistance.

Description

technical field [0001] The invention relates to an improvement of a packer, in particular to a high temperature and high pressure resistant multistage fracturing and acidizing packer. Background technique [0002] The packer is used for delamination in oil production engineering. The packer is designed with an oil production channel. When setting, the piston sleeve goes up, and the oil production channel is opened; after setting, the pressure of the upper layer acts on the balance piston, pushing upward The rubber sleeve protects the unsealing pin from shearing force; when unsealing, the unsealing pin is sheared by the friction between the rubber sleeve and the casing, and the piston sleeve goes down to close the oil production channel. [0003] At present, the general packer has the following disadvantages: [0004] First, during multi-stage fracturing, the floating ball does not descend smoothly, resulting in unsatisfactory sealing effect; [0005] Second, the temperatur...

AI Technical Summary

Problems solved by technology

[0004] First, during multi-stage fracturing, the floating ball does not descend smoothly, resulting in unsatisfactory sealing effect;

[0005] Second, the temperature cannot be adjusted by itself in a high temperature environment, and the high temperature resistance is poor;

[0006] Third, during multi-stage fracturing, sand blasters and packers are installed staggeredly, causing the packer to be stressed up and down, and the single-stage clamping effect is not good

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