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:
Jan. 13, 2009
Filed:
Apr. 10, 2006
Applicants:
Per G. Angman, Calgary, CA;
Robert Tessari, Calgary, CA;
Inventors:
Per G. Angman, Calgary, CA;
Robert Tessari, Calgary, CA;
Assignee:
Tesco Corporation, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/04 (2006.01); E21B 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for drilling boreholes using casing as the drill string and for removing a drilling assembly from the wellbore while leaving the casing in the well bore. In the method, the drilling assembly is prepared for removal from the wellbore by launching a release tool and manipulating the drilling assembly using the release tool.
Angman, Per. (2009). Method for drilling with casing (U.S. Patent No. 7475742). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7475742
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile