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

A technology of fracturing acidification and high temperature resistance, which is applied in the direction of sealing/isolation, production fluid, wellbore/well components, etc., and can solve problems such as poor high temperature resistance, unsmooth drop of the float ball, and unsatisfactory isolation effect. Achieve the effects of enhanced clamping effect, high temperature resistance and uniform force

Active Publication Date: 2019-07-23
淮安市井神钻采机具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0048] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0049] It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/127E21B43/26
CPCE21B33/127E21B43/26
Inventor 郭大进郭乃宏郭湧郭峰郭敏卞银华张鑫
Owner 淮安市井神钻采机具有限公司
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