Pretreatment for fracturing coal seams

Details Pretreatment for fracturing coal seams Pretreatment for fracturing coal seams

1980-06-12

1981-08-11

Pate, III, William F.

Mining or in situ disintegration of hard material

Processes

Breaking down by direct contact with fluid

299 5, 166307, 166308, E21C 4300

Patent

active

042830893

ABSTRACT:
A pretreatment for use in fracturing coal seams to increase gas permeability of the seams. The pretreatment involves injecting a material capable of swelling coal into a coal seam prior to fracturing the coal seam. The pretreatment material swells the coal and closes the natural cleats therein, enhancing the effectiveness of the subsequent fracturing step.

REFERENCES:
patent: 3384416 (1968-05-01), Ruehl
patent: 3814480 (1974-06-01), Dahl
patent: 3918761 (1975-11-01), Aldrich

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