The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1993
Filed:
Dec. 11, 1991
Applicant:
Inventor:
Carl T Montgomery, Plano, TX (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
299-5 ; 166308 ; 241-1 ; 299 16 ;
Abstract
An improved method for stimulating coal degasification wells comprising the use of a coal comminuting solvent to weaken the cleat structure of a coal seam immediately prior to use of high pressure gas in a gas cavitation process. A solvent such as ammonia is injected into the coal seam and allowed to dissolve materials from the cleat structure for a period of time sufficient to weaken that structure. Thereafter, high pressure gas is injected into the coal seam and suddenly released to cause disintegration of coal surrounding the borehole.