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Fire drive inner sealing tool

A technology of internal sealing and tools, which is applied in the direction of sealing/isolation, wellbore/well components, production fluids, etc., can solve the problems of poor sealing of fire drive packers, and achieve the effect of avoiding poor sealing

Active Publication Date: 2022-07-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a fire drive internal sealing tool to overcome the problems of poor sealing of fire drive packers in the prior art, and the fire drive internal seal tool can be used as a packer in the development process of heavy oil fire drive , through the inward expansion of the sealing structure, the annulus between the fire flooding double-layer pipe strings is sealed to meet the needs of fire flooding layered injection

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  • Fire drive inner sealing tool

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Embodiment Construction

[0041] In order to have a clearer understanding of the technical features, objects and effects of the present invention, the specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0042] The specific embodiments of the present invention described herein are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modifications based on the present invention, and these should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening element...

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Abstract

The invention relates to a fire drive inner sealing tool, comprising an outer tube part, and a plug-in inner tube part which can be slidably inserted and can be sealed and fixed in the outer tube part; The inward expansion seals against the sealing structure on the outer wall of the inserted inner tube part. The fire-flooding internal sealing tool can be used as a packer in the heavy oil fire-flooding development process. It expands inwardly through the sealing structure to seal the pipe string annulus between the double-layer fire-flooding strings, so as to meet the needs of fire-flooding layered injection. .

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a fire flooding inner sealing tool in the process of heavy oil fire flooding exploitation. Background technique [0002] In the process of heavy oil fire flooding, the sealing tool plays a crucial role, and its performance directly affects the recovery factor. At present, the main problem of the fire-flooding packer is that the sealing is not strict. Most of the packers use the single-stage piston method. It is not ideal and cannot effectively solve the problem of stratified injection of fire flooding under different injection pressure systems (mainly supporting tools such as packers and insert seals, long-term sealing and performance stability problems under alternating conditions of high and normal temperature). [0003] Therefore, the inventor of the present invention proposes a fire-flooding inner sealing tool to overcome the defects of the prior art by virtue of ye...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B33/12E21B43/243
CPCE21B43/243E21B33/1208
Inventor 许佳赛田野陈鹏董亮胡燕朱晓亮苏畅伍宇博张成宇
Owner PETROCHINA CO LTD