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High-temperature wellhead heat insulation system

A high-temperature, high-temperature-resistant technology, applied in the direction of isolation devices, sealing/package, wellbore/well components, etc., can solve the problems of high cost and long cycle, and achieve the effect of ensuring reliability

Pending Publication Date: 2021-08-10
CHINA OILFIELD SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing blowout preventers cannot withstand high temperatures above 200°C, and cannot meet high-temperature wellhead operating conditions. The operation mode of suspending production by killing the well and then performing workover and testing has a long cycle and high cost

Method used

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  • High-temperature wellhead heat insulation system
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  • High-temperature wellhead heat insulation system

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Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the application clearer, the embodiments of the application will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0027] In the existing blowout preventer, compression structures are arranged at the upper and lower ends of the sealing structure, one of the compression structures is mainly used to cover the sealing structure, and the other compression structure is used for compression. This dual-channel form is easily affected by the high-temperature oil in the well, and the working method is unreliable, and it cannot withstand the high temperature of the wellhead exceeding 200°C, which will cause high-temperature damage to the well control equipment and easily cause burns to the operators.

[0028] The...

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Abstract

The invention discloses a high-temperature wellhead heat insulation system. The high-temperature wellhead heat insulation system comprises a high-temperature-resistant heat insulation blowout preventer, a cooling pipe and a cooling cover; the high-temperature-resistant heat insulation blowout preventer comprises a tubular column base body, a cylinder sleeve, a pressing piece and a rubber core; the cylinder sleeve, the pressing piece and the rubber core are all installed in the tubular column base body, and a hydraulic control channel of the cylinder sleeve is located above the rubber core; the cylinder sleeve can move in the tubular column base body in the axial direction and abut against the pressing piece, so that the rubber core is pressed and sealed by the pressing piece; a containing cavity is formed in the abutting end of the cylinder sleeve, and when the cylinder sleeve abuts against the pressing piece, the pressing piece and the rubber core are located in the containing cavity; the cooling pipe is connected with the upper end of the high-temperature-resistant heat insulation blowout preventer and is used for cooling the interior of the high-temperature-resistant heat insulation blowout preventer; and the cooling cover is used for cooling the exterior of the high-temperature-resistant heat insulation blowout preventer.

Description

technical field [0001] This application relates to but not limited to wellhead heat insulation technology, especially a high temperature wellhead heat insulation system. Background technique [0002] In recent years, the operation volume of high-temperature, ultra-high-temperature wells and heavy oil thermal recovery wells has been increasing, and the wellhead temperature has reached above 200°C, even as high as 350°C. Existing blowout preventers cannot withstand high temperatures above 200°C, and cannot meet the high-temperature wellhead operating conditions. The operation mode of suspending production by killing the well and then performing workover and testing has a long cycle and high cost. Contents of the invention [0003] The embodiment of the present application provides a high-temperature wellhead heat insulation system, which can work reliably under high-temperature conditions and ensure the normal operation of well control equipment. [0004] The embodiment of ...

Claims

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Application Information

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IPC IPC(8): E21B36/00E21B33/03
CPCE21B36/003E21B33/03E21B36/001
Inventor 费春辉王景浩孙玉豹李敬松孙永涛赵永顺顾启林
Owner CHINA OILFIELD SERVICES
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