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:
Jun. 16, 2026
Filed:
Nov. 30, 2021
Epiroc Rock Drills Aktiebolag, Örebro, SE;
Mattias Göthberg, Örebro, SE;
Samuel Enblom, Örebro, SE;
EPIROC ROCK DRILLS AKTIEBOLAG, Örebro, SE;
Abstract
The present invention relates to a method for determining state of at least one joint of a drill string of a drill rig, the drill rig including a percussion device for inducing shock waves into the drill string, and a sensor for sensing stress waves in the drill string caused by impacts of the percussive device, the method comprising, when a stress wave is induced into the drill string by the percussive device: determining a representation of the incident stress wave caused by the percussive device; determining a representation of a reflected wave representing a reflection of the incident stress; estimating a stiffness of the at least one joint by estimating a force exerted on the at least one joint by the incident wave.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile