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High efficiency heat isolating oil pipe

A thermally insulated tubing and high-efficiency technology, which can be used in the fields of production fluids, wellbore/well components, and earth-moving drilling, etc., and can solve the problems of short thermal insulation life, easy fatigue damage, and unstable quality.

Inactive Publication Date: 2007-10-03
杨运良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the current high-vacuum prestressed heat-insulated oil pipes (including dual-purpose pipes for steam injection and oil production) have shortcomings such as short heat insulation life, unstable quality, and easy fatigue damage under the action of high vacuum.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] (1) Clean up the oil stains and floating dust on the inner pipe surface and the inner wall of the outer pipe of the prefabricated pre-stressed heat-insulated oil pipe (or dual-purpose pipe for steam injection and oil production).

[0007] (2) Apply high-efficiency reflective and heat-insulating paint in an environment with a temperature of 5-45°C. The coating interval is 2 hours, and the coating is 4 times. Silica aerosol can be coated and used in the same way, and can also be wrapped and used in its products.

[0008] (3) After coating the high-efficiency reflective insulation coating and silica aerosol, it is allowed to dry naturally (4-6 days) in an environment of 5-45°C.

[0009] (4) The pre-stressed heat-insulating pipe (or dual-purpose pipe for steam injection and oil production) after coating and drying is produced according to the production process of pre-stressed heat-insulating pipe. In the case of a vacuum degree of 0.133Pa, it can reach the E-class insulation l...

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PUM

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Abstract

The present invention belongs to the field of technological improvement of heat insulating oil pipe for use in steam injecting thick oil well, and provides heat insulating oil pipe operating mainly on solid heat insulating technology, rather than vacuum heat insulating technology. The heat insulating oil pipe with high heat isolating performance and stable quality is one double-layered pipe with high efficiency reflecting heat insulating paint or silica sol painted to the outer wall of the inner pipe and lower vacuum degree or even normal pressure in the sandwich.

Description

[0001] Technical Field: The present invention is an improvement of the heat insulation technology in the manufacturing process of a vacuum insulated tubing (including dual-purpose tubing for steam injection and oil production) used for steam injection in heavy oil wells. Through the new idea of ​​changing the vacuum heat insulation technology to solid heat insulation technology, the thermal insulation oil pipes (including steam injection and oil production dual-purpose pipes) after the transformation have good thermal insulation performance and stable quality. Background technique: [0002] In 1988, my country developed the fourth generation of pre-stressed heat-insulating tubing (high vacuum, getter, aluminum silicate fiber, aluminum foil), but due to technological limitations, the service life is far below the standard requirements, and the quality is unstable . [0003] According to the People’s Republic of Petroleum and Natural Gas Industry Standard SY / T5324-94 "Prestressed Ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24
Inventor 杨运良
Owner 杨运良