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Insulation conductor temperature-limiting heater for underground strata heating combined with three-phase y structure

A technology of underground rock formations and heaters, which is applied in the direction of mining fluids, electric heating devices, gas fuels, etc., and can solve the problems that heaters are difficult to combine with underground rock formations and unreliable current.

Inactive Publication Date: 2008-04-16
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Some heaters may be difficult to incorporate in underground formations
Current flow between downhole heaters in subsurface formations can be unreliable due to difficulty in making subsurface connections and instability of current flow in subsurface conditions

Method used

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  • Insulation conductor temperature-limiting heater for underground strata heating combined with three-phase y structure
  • Insulation conductor temperature-limiting heater for underground strata heating combined with three-phase y structure
  • Insulation conductor temperature-limiting heater for underground strata heating combined with three-phase y structure

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Embodiment Construction

[0021] The following description generally relates to systems and methods for processing hydrocarbons in formations. Such formations can be processed to produce hydrocarbon products, hydrogen, and other products.

[0022] "Hydrocarbon" is generally defined as a molecule composed primarily of carbon and hydrogen atoms. Hydrocarbons may also include other elements such as, but not limited to, halogens, metallic elements, nitrogen, oxygen, and / or sulfur. Hydrocarbons may be, but are not limited to, kerogen, bitumen, pyrobitumen, petroleum, natural mineral wax, and bituminous rock. Hydrocarbons may be located in or near mineral matrices in the earth. Substrates may include, but are not limited to, sedimentary rock, sand, sedimentary quartzite, carbonates, diatomaceous earth, and other porous media. A "hydrocarbon fluid" is a fluid comprising hydrocarbons. Hydrocarbon fluids may include, carry, or be entrained in non-hydrocarbon fluids, such as hydrogen, nitrogen, carbon monoxi...

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PUM

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Abstract

A heating system for a subsurface formation is described. The heating system includes a first heater, a second heater, and a third heater placed in an opening in the subsurface formation. Each heater includes: an electrical conductor; an insulation layer at least partially surrounding the electrical conductor; and an electrically conductive sheath at least partially surrounding the insulation layer. The electrical conductor is electrically coupled to the sheath at a lower end portion of the heater. The lower end portion is the portion of the heater distal from a surface of the opening. The first heater, the second heater, and the third heater are electrically coupled at the lower end portions of the heaters. The first heater, the second heater, and the third heater are configured to be electrically coupled in a three-phase wye configuration.

Description

technical field [0001] The present invention generally relates to methods and systems for heating and producing hydrocarbons, hydrogen, and / or other products from various subterranean formations, such as hydrocarbon-bearing formations. Embodiments relate to insulated conductor temperature limited heaters for heating subterranean formations. Background technique [0002] Hydrocarbons obtained from subterranean formations are commonly used as energy sources, feedstocks, and consumer products. Concerns about the depletion of available hydrocarbon sources and the reduction in the overall amount of produced hydrocarbons have led to the development of many processes to achieve more efficient recovery, treatment and / or use of available hydrocarbon sources. In-situ processes may be used to remove hydrocarbon feedstock from subterranean formations. The chemical and / or physical properties of the hydrocarbon feedstock in the subterranean formation may need to be altered to allow the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B36/00E21B36/04
CPCE21B43/17E21B43/24E21B43/2401E21B43/30E21B36/04C10L3/08H05B2214/03
Inventor C·L·桑德伯格H·J·维讷格
Owner SHELL INT RES MAATSCHAPPIJ BV
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