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:
Sep. 20, 1977
Filed:
Jun. 28, 1976
Applicant:
Inventor:
Charles S Godfrey, Berkeley, CA (US);
Assignee:
Physics International Company, San Leandro, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166299 ; 166 63 ; 166177 ; 166250 ; 166308 ;
Abstract
A method for stimulating oil and gas wells to increase production including filling the lower portion of the well above the pay zone level having exposed rock with a fracturing fluid, and sealing the well above the lower portion. A shock wave is then applied to the fracturing fluid, which, when applied thereby to the rock at the pay zone creates a stress wave in the rock having a rise time faster than the time required for sound to traverse one half the periphery of the rock at the pay zone, and having an amplitude which will fracture but not crush the rock.