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:
Oct. 04, 1994
Filed:
Aug. 02, 1993
Applicant:
Inventor:
Donald L Howlett, Kingwood, TX (US);
Assignee:
Texaco Inc., White Plains, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
166250 ; 166 66 ; 166 665 ; 166255 ; 324346 ;
Abstract
The steel casing of a well is deliberately magnetized with a known orientation by the passage therethrough of a tool having a demagnetizing section and a magnetizing section along with a gyrocompass section and a magnetic compass section. The casing is first demagnetized and then remagnetized with a polarization which can be determined. The two compasses establish the orientation of the remagnetized casing.
Howlett, Donald. (1994). Method and apparatus for establish the orientation of tools in a cased (U.S. Patent No. 5351755). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5351755
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile