Coalbed methane drilling

Details Coalbed methane drilling Coalbed methane drilling

1994-02-16

1995-05-02

Buiz, Michael Powell

Boring or penetrating the earth

Processes

Boring with specific fluid

175 61, E21B 700

Patent

active

054111048

ABSTRACT:
A system for drilling low rate coalbed formations wherein the formation has anisotropic fracture characteristics which create low permeability (high volatile B bituminous rank or lower). Typically these coalbeds have vitrinite reflectance less than 0.78 R.sub.o. The system includes drilling and completing these formation with a horizontal borehole that is drilled with a gas turbine in an underbalanced pressure condition relative to the pressure of the formation. The horizontal borehole is drilled substantially transverse to the general direction of face cleats within the coalbed.

REFERENCES:
patent: 3873156 (1975-03-01), Jacoby
patent: 4304308 (1981-12-01), Munding et al.
patent: 4333539 (1982-06-01), Lyons et al.
patent: 4432423 (1984-02-01), Lyons et al.

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