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. 11, 1978
Filed:
Nov. 15, 1976
Applicant:
Inventors:
Jack R Bohn, Rancho Palos Verdes, CA (US);
Durk J Pearson, Palos Verdes Estates, CA (US);
Assignee:
TRW Inc., Redondo Beach, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
299-4 ; 166251 ; 166259 ;
Abstract
In a process for the recovery of resources from underground geological structures, the process is improved by fracturing the walls of the underground structure and large boulders or rocks by inducing thermal gradients in the deposits. Determination of the thermal gradients which will produce the desired fracturing pattern in each specific deposit involves subjecting a core sample to a controlled heating program. When the heating program has been established from tests on the core sample, it is then applied to the underground formation.