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US 4,349,228 AGranted
Method for dewatering a subterranean formation via a borehole
AssigneeConsolidation Coal Company
InventorEdward C. Rohde
Life of this patent
Estimating the term…
Abstract
An improvement in a method for communicating the surface and a subterranean coal seam via a borehole positioned to provide access for the positioning of power transmission and fluid transmission lines from the seam to the surface, the improvement comprising; extending a portion of the borehole beneath the seam, casing at least a portion of the extension of the borehole and thereafter pumping water from the borehole extension.
Claims3
A method of installing a perforated casing beneath a subterranean seam of a carbonaceous deposit and mining through the deposit in the area of the casing comprising,
- providing a borehole said borehole comprising a seam portion extending through said seam
- and a lower portion below said seam portion,
- providing a perforated casing in said lower portion of said borehole, said casing having a top portion;
- providing a packer in said top portion of said perforated casing,
- mining said seam, and then removing said packer from said top portion of said perforated casing, providing a pumping means in said perforated casing in said lower portion of said borehole, thereafter pumping water from said lower portion of said borehole.
2 more elements
Dependencies are inferred from the claim text.