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US 4,093,025 AGranted
Methods of fluidized production of coal in situ
AssigneeIn Situ Technology, Inc.
InventorRuel C. Terry
Life of this patent
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Abstract
A method of producing combustible gases, synthetic crude oils, coal chemicals and heat from coal in situ utilizes the combined teachings of in situ gasification, liquefaction and pyrolysis.
Claims2
A method of producing coal in situ comprising the steps of
- drilling wells into a coal formation,
- taking oriented cores in the coal formation,
- testing the coal formation for water content,
- completing the wells so that they are hermetically sealed,
- installing facilities at the surface to inject fluids into the coal formation and to remove fluids from the coal formation,
- removing water from the coal formation,
- igniting the coal formation,
- removing the products of combustion from the coal formation,
- installing a heat exchanger in the wells used to withdraw fluids from the coal formation,
- extracting and recovering sensible heat from withdrawn fluids, and
- producing sonic vibrations in the withdrawal wells to prevent the build-up of particulate matter in the wells.
8 more elements
A method of producing coal in situ comprising the steps of
- drilling wells into a coal formation,
- taking oriented cores in the coal formation,
- testing the coal formation for water content,
- completing the wells so that they are hermetically sealed,
- installing facilities at the surface to inject fluids into the coal formation and to remove fluids from the coal formation,
- removing water from the coal formation,
- igniting the coal formation,
- removing the products of combustion from the coal formation,
- installing a heat exchanger in the wells used to withdraw fluids from the coal formation,
- extracting and recovering sensible heat from the withdrawn fluids, and
- reversing the flow of hot fluids through the removal wells to burn tars which may have accumulated in the removal wells.
8 more elements
Dependencies are inferred from the claim text.