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:
Nov. 08, 2005
Filed:
Jan. 09, 2003
Matthew Robert George Bell, Houston, TX (US);
Eugene Murphy, Houston, TX (US);
Edward Paul Cernocky, Mandeviille, LA (US);
Christopher Burres, Houston, TX (US);
Aron Ekelund, Houston, TX (US);
Allen Lindfors, Inyokern, CA (US);
Matthew Robert George Bell, Houston, TX (US);
Eugene Murphy, Houston, TX (US);
Edward Paul Cernocky, Mandeviille, LA (US);
Christopher Burres, Houston, TX (US);
Aron Ekelund, Houston, TX (US);
Allen Lindfors, Inyokern, CA (US);
Shell Oil Company, Houston, TX (US);
Abstract
Disclosed is a casing conveyed perforating apparatus and method for externally perforating a wellbore casing. The perforating apparatus is attached to the outside of the casing and is conveyed along with the casing when it is inserted into the wellbore. The perforation is accomplished using two groups of charges, which are contained in protective pressure chambers. Each pressure chamber is positioned radially around the outside of the wellbore casing. The pressure chambers form longitudinally extending ribs, which conveniently serve to center the casing within the wellbore. One group of charges is aimed inward in order to perforate the casing. A second group is aimed outward in order to perforate the formation. In an alternative embodiment, only one group of bi-directional charges is provided.