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:
Mar. 02, 2004
Filed:
Feb. 06, 2002
Applicant:
Inventors:
Donald H. Van Steenwyk, San Marino, CA (US);
James N. Towle, Seattle, WA (US);
Assignee:
Scientific Drilling International, Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 4/300 ; E21B 4/709 ;
U.S. Cl.
CPC ...
E21B 4/300 ; E21B 4/709 ;
Abstract
In the method of providing for well tubular member magnetization, the steps include providing a magnetizing structure comprising an electrical coil defining an axis, relatively displacing the member and the structure, with the coil positioned and guided in close, centered proximity to the member, while supplying electric current to flow in the coil, thereby creating magnetic flux passage through the member and core to magnetize the member, or a part of the member, and displacing the member in a wellbore.