Self-balancing packer

A self-balancing, packer technology, used in sealing/packing, wellbore/well components, earth-moving drilling, etc., can solve problems such as large annular pressure difference, packer can not bear, etc., to improve the pressure bearing capacity, reducing the pressure burden, and improving the effect of developing and using conditions

Pending Publication Date: 2022-07-26
ANTON OILFIELD SERVICES (GRP) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of this application is to provide a self-balancing packer to solve

Method used

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Examples

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Example Embodiment

[0089] Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the application will be more thoroughly understood, and will fully convey the scope of the application to those skilled in the art. It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the usual meanings understood by those skilled in the art to which this application belongs.

[0090] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizont...

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Abstract

The invention provides a self-balancing packer. The self-balancing packer comprises a central pipe; the outer core pipe is arranged in the middle of the central pipe in a sleeving mode, and the outer core pipe is sequentially sleeved with a self-balancing assembly, a rubber sleeve sealing assembly and a rubber sleeve locking assembly from top to bottom; the outer pipe assembly is arranged on the central pipe and at least part of the outer core pipe in a sealing and sleeving mode, a balance cavity is formed by the outer pipe assembly and the central pipe, and the self-balance assembly is arranged in the balance cavity; the outer pipe assembly is provided with at least one pair of balance holes communicating with the outside and the balance cavity in the radial direction, the at least one pair of balance holes are located above and below the rubber sleeve sealing assembly respectively, and pressure on the outer side of the outer pipe assembly can enter the balance cavity through the at least one pair of balance holes so that the self-balance assembly can absorb the pressure. According to the technical scheme, most of pressure is absorbed through the self-balancing assembly, so that the pressure bearing burden of the rubber sleeve sealing assembly is relieved, and the pressure bearing capacity of the packer is improved.

Description

technical field [0001] The present application relates to the technical field of oil wells, in particular to a self-balancing packer. Background technique [0002] In downhole operations, the application of hydraulic fracturing, water injection, water control and other processes is becoming more and more common. During the operation of each process, packers are required to isolate each reservoir for segmented operation. Common packers include permanent packers and recoverable packers. The recoverable packers are unpacked by lifting up the string to shear the unpacking shear pins during unpacking, and the recovery packers are extracted and recovered. . [0003] As the development of oil and gas wells is becoming more and more difficult, such as fracturing operations, the packer needs to withstand a larger annular pressure difference. pin to bear the annular pressure difference, but too many unpacking shear pins will also require greater lifting and unpacking force, which wi...

Claims

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Application Information

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IPC IPC(8): E21B33/127
CPCE21B33/127
Inventor 张红董平原龙志辉席浩腾
Owner ANTON OILFIELD SERVICES (GRP) LTD
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