Method and apparatus for repurposing well sites for geothermal energy production

Inactive Publication Date: 2019-05-02
EAVOR TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0022]One object of one embodiment of the present invention is to provide an improved m

Problems solved by technology

From an environmental point of view, this requires invasive operations which ultimately affect the landscape of an area scheduled for geothermal development.
As such, this amount of energy is too substantive too leave unused.
Although useful in certain scenarios, the limitation with this arrangement relates to the confined interior volume of the drill string and further only a small area of the loop is exposed to a geothermal zone.
This inherently limits efficient heat transfer.
This does nothing to control improperly maintained unuse

Method used

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  • Method and apparatus for repurposing well sites for geothermal energy production
  • Method and apparatus for repurposing well sites for geothermal energy production
  • Method and apparatus for repurposing well sites for geothermal energy production

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Example

[0044]Similar numerals used in the Figures denote similar elements.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0045]Referring now collectively to FIGS. 1, 1A and B shown is a schematic illustration of a daisy chain of wells, globally denoted by numeral 10. In this embodiment, each surface location, generally denoted by numeral 12, includes an injection well 14 connected to a lateral well conduit 16 and production well 18. In this manner, the continuous well structure subscribes to a generally U shaped structure, best referenced in FIG. 1B.

[0046]As illustrated in FIG. 1, each location 12 is discrete and linked to proximal locations in an elegant and advantageous manner. As an example, the distance between locations may be 3,500 meters. This will, of course, vary from one situation to another. Reference to FIG. 1B delineates linkage specification.

[0047]In FIG. 2, numeral 20 is representative of the power generation apparatus. Selections for the apparatus 20 will be discussed her...

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Abstract

A method and system for capturing geothermal energy. Injection and production well pairs in a geothermal zone are connected with a power generation apparatus between the production well of one well pair and the injection well of an adjacent well pair in a subterranean closed loop daisy chain configuration. Fluid circulated through the loop and the power generation apparatus recover subterranean heat energy. Specification is also disclosed in respect of application of the technology to repurpose an unused or suspended oilfield.

Description

[0001]The present invention relates to a method and apparatus for repurposing well sites in an economical and environmentally responsible manner.BACKGROUND OF THE INVENTION[0002]The benefits of geothermal energy are well known and have been the subject matter of many publications and patents. The general concept is to drill into a formation to extract heat therefrom and return the generated steam and water to the surface where the steam drives, for example, a power generating device. From an environmental point of view, this requires invasive operations which ultimately affect the landscape of an area scheduled for geothermal development.[0003]Existing well sites have some commonality with geothermal sites, but offer preexistence in the landscape, a processed tract of land and wells. There are are a plethora of unused or suspended wells in Alberta which remain as such in view of the cleanup cost. It has been proposed, without effect or implementation, to capture geothermal heat from...

Claims

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Application Information

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IPC IPC(8): F24T10/15
CPCF24T10/15F24T2010/53F03G7/04F24T10/20F24T10/10Y02E10/46Y02E10/10
Inventor REDFERN, JOHN
Owner EAVOR TECH INC
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