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Special coupling with sealing and positioning structure

A positioning structure and sealing technology, applied in drilling equipment, earthwork drilling, drill pipe, etc., to ensure quality, avoid machining accuracy problems, and facilitate machining.

Pending Publication Date: 2020-08-07
江苏联冠兆星石化科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a special coupling with a sealing and positioning structure to solve the problem of sealing and positioning when the "inner insulation pipe" is used in the process of thermal fluid collection

Method used

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  • Special coupling with sealing and positioning structure
  • Special coupling with sealing and positioning structure

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Embodiment Construction

[0024] 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 to the other element or intervening elements may also be present.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions ...

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Abstract

The invention discloses a special coupling with a sealing and positioning structure, and relates to the technical field of thermal fluid and petroleum collecting and conveying equipment. The special coupling is provided with a coupling main body mounted on a pipeline, pipeline connecting parts of the coupling main body, an extending part between two pipeline connecting parts on the inner wall of the coupling main body, a positioning groove formed in the extending part and used for fixing an inner core tube; and a sealing surface used for sealing the end part of the inner core tube. The specialcoupling can be used for solving the problems of sealing and positioning when an 'inner heat preservation pipe 'is used in the thermal fluid collection process, a connecting method of a common coupling is reserved, an original operation method of an oil well operation method is still maintained, the field construction quality is ensured, and the special coupling can be used for transformation andconnection of old oil pipes and can also be used for connection of newly designed oil pipes, so that the dimensional accuracy, roughness and the like of the coupling main body are easy to control, and the special coupling is very convenient to replace and repair even if problems exist.

Description

technical field [0001] The invention relates to the technical field of thermal fluid and oil collection and transportation equipment, in particular to a special coupling with a sealing and positioning structure for connecting pipelines. Background technique [0002] The commonly used traditional oil production method is rod pumping, that is, the steel tubing is connected by a joint, and the steel sucker rod is used to connect the oil pump at the bottom of the well. The temperature gradient at the bottom of the well is about 3°C ​​per 100 meters. In addition to the ground base temperature, the initial liquid temperature of an oil well with a length of 2000 meters is generally 60-80°C. [0003] Through the up and down movement of the sucker rod, the downhole liquid is lifted to the surface. During this process, due to the heat dissipation effect of the steel pipe, the temperature of the liquid in the pipe gradually drops, and the wax in the liquid gradually precipitates, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/02
CPCE21B17/021
Inventor 严为群曹征远陈广超
Owner 江苏联冠兆星石化科技有限公司
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