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Diameter-variable assembly and diameter-variable sealing equipment

A technology of sealing equipment and components, which is applied in the directions of sealing/isolation, wellbore/well components, production fluids, etc., can solve the problems of reducing the service life of variable diameter components, poor sealing performance, reducing the passing performance and sealing performance, and achieving The effect of prolonging the service life, improving the wear resistance and improving the passing performance

Pending Publication Date: 2017-06-13
BEIJING AOSAIQI PETROLEUM TECH DEV CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

The diameter reduction range of the diameter reduction assembly of the existing diameter reduction sealing equipment is small and the sealing performance is poor when the diameter is reduced, which reduces the passing performance and sealing performance
[0005] On the other hand, in order to ensure the sealing effect, the known sealing method ensures the sealing through the cooperation of non-metal or metal and non-metal, which reduces the service life of the variable diameter assembly

Method used

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  • Diameter-variable assembly and diameter-variable sealing equipment
  • Diameter-variable assembly and diameter-variable sealing equipment
  • Diameter-variable assembly and diameter-variable sealing equipment

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Embodiment Construction

[0054] Various exemplary embodiments, features, and aspects of the invention will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated. The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0055] In addition, in order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. It will be understood by those skilled in the art that the present invention may be practiced without certain of the specific details. In some instances, methods, means, and elements well known to those skilled...

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Abstract

The invention provides a diameter-variable assembly and diameter-variable sealing equipment comprising the diameter-variable assembly. The diameter-variable assembly comprises a sliding sleeve, a first limiting sleeve, a second limiting sleeve, a sealing sleeve and an inner fixing sleeve, wherein the first limiting sleeve and the second limiting sleeve are arranged at two ends of the inner fixing sleeve respectively; the sliding sleeve is spliced by at least two sliding branch sections, two ends of each sliding branch section are mounted in the first limiting sleeve and the second limiting sleeve respectively and are in radial sliding fit with the first limiting sleeve and the second limiting sleeve respectively; the outer wall of the sealing sleeve is in seal fit with the inner wall surface of the sliding sleeve, the sealing sleeve is spliced by at least two sealing branch sections, and each splicing gap of the sliding branch sections corresponds to one sealing branch section. When the outer diameter of the diameter-variable assembly is changed, the sealing performance of the diameter-variable assembly is guaranteed.

Description

technical field [0001] The present invention relates to the liquid accumulation discharge technology in the fields of oil and gas fields and coalbed methane exploitation, in particular to a variable-diameter assembly, and also relates to a variable-diameter sealing device with the above-mentioned variable-diameter assembly. Background technique [0002] During the exploitation of low-pressure oil and gas fields and coalbed methane, wellbore fluid accumulation is one of the main problems restricting the stable and high production of oil and gas wells. In order to ensure the normal production of oil and gas wells, it is necessary to discharge the accumulated fluid in the wellbore in time. [0003] Utilizing variable-diameter sealing equipment is one of the commonly used liquid drainage methods. Its working principle is: the variable-diameter sealing equipment is at the set position underground, and the variable-diameter components of the variable-diameter sealing equipment imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03E21B43/17E21B43/26
CPCE21B33/03E21B43/17E21B43/26
Inventor 刘宜贵
Owner BEIJING AOSAIQI PETROLEUM TECH DEV CO LTD
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