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:
Aug. 14, 2018
Filed:
May. 04, 2015
Applicants:
William T. Bell, Huntsville, TX (US);
James G. Rairigh, Houston, TX (US);
Inventors:
William T. Bell, Huntsville, TX (US);
James G. Rairigh, Houston, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 29/02 (2006.01); E21B 43/116 (2006.01); E21B 43/117 (2006.01); F42B 3/22 (2006.01);
U.S. Cl.
CPC ...
E21B 43/117 (2013.01); E21B 29/02 (2013.01); F42B 3/22 (2013.01);
Abstract
A shaped charge pipe cutter is constructed with the cutter explosive material packed intimately around an axially elongated void space that is continued through a heavy wall boss portion of the upper thrust disc. The boss wall is continued to within a critical initiation distance of a half-cuter junction plane. An explosive detonator is positioned along the void space axis proximate of the outer plane of the upper thrust disc. Geometric configurations of the charge thrust disc and end-plate concentrate the detonation energy at the critical initiation zone.