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:
May. 06, 2025
Filed:
Mar. 10, 2022
Epiroc Rock Drills Aktiebolag, Örebro, SE;
Gustav Mörtzell, Örebro, SE;
Thomas Adolfsson, Örebro, SE;
EPIROC ROCK DRILLS AKTIEBOLAG, Örebro, SE;
Abstract
The invention relates to a method for determining the state of a joint joining a first and a second drill string component. A drill rig includes a rotation unit for rotating the drill string and means for determining a representation of a torque applied by the rotation unit. A joint loosening mechanism distinct from the rotation unit apply a joint loosening torque acting on the drill string when loosening a joint. The method includes applying a torque in a joint loosening direction by means of the rotation unit, and applying a joint loosening torque acting on the drill string by means of the joint loosening mechanism.