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. 24, 1990
Filed:
Dec. 14, 1988
Applicant:
Inventors:
John W Dobrinski, Weatherford, OK (US);
Thomas L Elliston, Ft. Worth, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F42B / ;
U.S. Cl.
CPC ...
102307 ; 102310 ; 102313 ; 102476 ; 102493 ;
Abstract
An improved well perforating device comprising a body member in the form of a cylindrical pressure vessel containing shaped explosive charges positioned normal to the longitudinal axis of the body member. The perforating device body is systematically shaped externally at the foci of the hollow cones so that both focused and wall expansion energy of the explosive energy of detonation is sufficiently controlled to prevent excessive deformation of the outer diameter of the body member.