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:
Jun. 01, 1993
Filed:
May. 10, 1991
Applicant:
Inventor:
Thomas D Ricles, Grand Prairie, TX (US);
Assignee:
Dresser Industries, Inc., Dallas, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166298 ; 175-456 ; 175297 ;
Abstract
A firing apparatus for use with a tubing-conveyed perforating apparatus is disclosed. Wellbore pressure applies an upward force to a first piston connected by a shearable coupling to a firing piston. At a predetermined pressure the coupling shears, allowing the first piston to move upward. The first piston moves upward until the firing piston is in fluid communication with the pressure. The firing piston is forced downward by the pressure, firing the perforating apparatus.