04089374 is referenced by 278 patents and cites 11 patents.

A well is drilled from the surface of the earth into an underground coal formation. The coal seam is fractured by fluids injected under pressure. Methane entrained in the cracks and fissures is removed to surface facilities. Coal seam in the vicinity of well bore is partially dewatered. Diameter of well bore in the coal section is enlarged first by underreaming the hole, then by a vertical in situ burn to form a collection chimney. Methane desorbed from the coal is withdrawn to surface facilities.

Title
Producing methane from coal in situ
Application Number
5/751135
Publication Number
4089374
Application Date
December 16, 1976
Publication Date
May 16, 1978
Inventor
Ruel C Terry
Denver
CO, US
Assignee
In Situ Technology
CO, US
IPC
E21B 43/26
E21B 43/24
View Original Source