Withdrawal well equipment for underground coal gasification process and application of withdrawal well equipment

A technology for underground gasification and production of wells, applied in coal gasification, underground mining, boreholes/well components, etc., can solve problems such as high cost and complex structure, achieve equipment cost saving, safe and controllable operation, and improve reliability Effects on sex and safety

Active Publication Date: 2016-11-09
ZHONGWEI SHANGHAI ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that in this patent, auxiliary wells are used to inject chilling fluid to cool the product gas, but due to the existence of a separate auxiliary well, this design scheme is undoubtedly costly and relatively complicated in structure

Method used

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  • Withdrawal well equipment for underground coal gasification process and application of withdrawal well equipment
  • Withdrawal well equipment for underground coal gasification process and application of withdrawal well equipment
  • Withdrawal well equipment for underground coal gasification process and application of withdrawal well equipment

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Embodiment Construction

[0036] The invention provides a production well equipment used in an underground coal gasification process. In particular, the present invention provides a production well equipment that can remove product gas after cooling by injecting a coolant during the underground coal gasification process, and also provides the production well equipment in the underground coal gasification process. application.

[0037] According to the present invention, there is provided a production well equipment for the underground coal gasification process, the production well equipment includes wellhead equipment and casing, as well as product pipes, coolant pipes and monitoring instrumentation systems located in the casing, wherein :

[0038] The casing is used to reinforce and isolate the wellbore of the production well, and it is connected with a collar and thread and fixed in the wellbore of the production well through a cement layer;

[0039] The product pipe is used to transport the produc...

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Abstract

The invention provides withdrawal well equipment for an underground coal gasification process. Particularly, in the underground coal gasification process, the withdrawal well equipment can remove product gas after a cooling agent is injected for cooling. The invention further provides application of the withdrawal well equipment in the underground coal gasification process. Through design, material selection and application of all components of the withdrawal well equipment and optimization of the application of a withdrawal well, operation of the withdrawal well equipment is safer and more controllable, and most components such as wellhead equipment, product pipes, cooling agent pipes and a monitoring instrument system of the withdrawal well equipment can be completely or partially recycled and reutilized after the gasification process is finished.

Description

technical field [0001] The invention provides a production well equipment used in an underground coal gasification process. In particular, the present invention provides a production well equipment that can remove product gas after cooling by injecting a coolant during the underground coal gasification process, and also provides the production well equipment in the underground coal gasification process. application. Background technique [0002] The Underground Coal Gasification (UCG or ISC) process is the direct conversion of coal to product gas (also called crude synthesis gas) through the combustion and gasification of underground coal seams in the presence of Applications, including fuel production, chemical production, and power generation. Given the increasingly stringent environmental requirements of the mining industry and the associated labor and infrastructure costs, this UCG technology is undoubtedly attractive for most coal deposits. [0003] For the coal gasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/295E21B43/16E21B47/06E21B47/07E21B47/00
CPCE21B43/16E21B43/295E21B47/00E21B47/06E21B47/07
Inventor 卡斯珀·扬·亨德利克·伯格汪原理闵振华
Owner ZHONGWEI SHANGHAI ENERGY TECH CO LTD
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