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OwnerRobert Gardesinventor
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A method of drilling multiple boreholes within a single caisson, for recovery of methane gas from a coal bed, including the steps of drilling first and second vertical boreholes from a single location within a single caisson; drilling at least one or more horizontal wells from the several vertical bore hole, the horizontal wells drilled substantially parallel to a face cleat in the coal bed; drilling at least one or more lateral wells from the one or more horizontal wells, the lateral wells drilled substantially perpendicular to one or more face cleats in the coal bed; continuously circulating water through the drilled vertical, horizontal and lateral wells to recover the water and entrained methane gas from the coal bed; applying friction or choke manifold to the water circulating down the well bores so that the water appears to have a hydrostatic pressure within the well sufficient to maintain an equilibrium with the hydrostatic pressure in the coal bed formation; and drilling at least a third vertical borehole within the single caisson, with one or more horizontal boreholes and one or more lateral boreholes for returning water obtained from the lateral wells into a water zone beneath the surface.
A method of drilling one or more production wells in a coal bed formation within a caisson during a drilling phase, wherein said one or more production wells are for recovering methane gas from the coal bed formation during a production phase, comprising the following steps:
A method of drilling multiple boreholes in a coal bed formation within a caisson in a drilling phase, comprising the following steps:
A method of drilling multiple boreholes within a caisson during a drilling phase, at least some of said boreholes for recovery of methane gas from a coal bed during a production phase, said drilling phase comprising the following steps:
A method of recovering methane gas from a pressurized coal bed formation through one or more production wells within a single caisson, the method including a drilling phase that includes steps of drilling the one or more production wells and continuously circulating untreated substantially clear drilling water during the drilling phase and applying choke and/or friction to the continuously circulating drilling water to raise a hydrostatic pressure of the drilling water to prevent collapse of the coal bed formation, and
A method of recovering methane gas from a coal bed formation comprising the following steps:
Dependencies are inferred from the claim text.