Production and grout liner for methane drainage in subterranean

Details Production and grout liner for methane drainage in subterranean Production and grout liner for methane drainage in subterranean

1986-06-13

1987-08-18

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

166292, 175 62, 299 12, 405268, E21B 3313

Patent

active

046870601

ABSTRACT:
A process is provided for sealing a degas hole in a coal seam prior to mining of the coal therein which includes the steps of inserting a perforated liner into the degas hole substantially the entire length thereof and pumping grout down the center of the perforated liner to the end of the degas hole. As the end of the degas hole is filled with grout, pressure is increased to force grout through the perforations in the liner to fill the degas hole along the entire length thereof. The perforated liner is also useful in the election of methane gas prior to sealing of the degas hole and further ensures a clear path through the degas hole so that sloughing, or caving, of the degas hole prior to grouting does not interfere with the complete sealing of the degas hole.

REFERENCES:
patent: 3177955 (1965-04-01), Allen et al.
patent: 4183407 (1980-01-01), Knopik
patent: 4300631 (1981-11-01), Sainato et al.
patent: 4303274 (1981-12-01), Thakur
patent: 4321967 (1982-03-01), Koppe et al.

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