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Underground gasification of bituminous coal

Wells – Processes – In situ combustion
Patent

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Underground linkage of wells for production of coal in situ

Wells – Processes – In situ combustion
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Unique method of hydraulic fracturing

Wells – Processes – In situ combustion
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Upgrading and recovery of heavy crude oils and natural bitumens

Wells – Processes – In situ combustion
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Upgrading and recovery of heavy crude oils and natural...

Wells – Processes – In situ combustion
Reexamination Certificate

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Use of recycled combustion gas during termination of an in-situ

Wells – Processes – In situ combustion
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Vapor-extraction system for removing hydrocarbons from soil

Wells – Processes – In situ combustion
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Vicous oil recovery method

Wells – Processes – In situ combustion
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Viscous oil recovery

Wells – Processes – In situ combustion
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Viscous oil recovery method

Wells – Processes – In situ combustion
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Viscous oil recovery method

Wells – Processes – In situ combustion
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Water purification with fragmented oil shale

Wells – Processes – In situ combustion
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Well completion for injecting high purity oxygen in a fire flood

Wells – Processes – In situ combustion
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Well liner segments for in situ petroleum upgrading and...

Wells – Processes – In situ combustion
Reexamination Certificate

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