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:
Dec. 08, 1987
Filed:
Jan. 03, 1986
Applicant:
Inventor:
Daniel N Hopkins, Dallas, TX (US);
Assignee:
Mobil Oil Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73799 ; 738656 ;
Abstract
A method and apparatus for determining crack initiation and propagation in metals subjected to environmental conditions encountered in drilling deep wells wherein strain sensors are used to measure crack initiation and propagation so that a prediction can be made about the life expectancy of the metal in actual operating conditions.