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:
Aug. 09, 2016
Filed:
Nov. 10, 2011
Hanno Reckmann, Nienhagen, DE;
Bernhard Meyer-heye, Bremen, DE;
Tristan Lippert, Celle, DE;
Christian Herbig, Lower Saxony, DE;
Hanno Reckmann, Nienhagen, DE;
Bernhard Meyer-Heye, Bremen, DE;
Tristan Lippert, Celle, DE;
Christian Herbig, Lower Saxony, DE;
BAKER HUGHES INCORPORATED, Houston, TX (US);
Abstract
A method of operating a drill string includes receiving signals indicative of rotation of a bottom hole assembly (BHA) of the drill string; receiving signals indicative of the torque experience by the BHA; determining from the received signals an average slipping torque and a maximum sticking torque; determining a friction ratio based on the maximum sticking torque and the average slipping torque; and generating an indication that the friction ratio exceeds a limit.