US Patent Issued to Landmark Graphics on Aug. 11 for "Calibration of drillstring weight with drag for friction factor estimation" (Texas Inventor)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,058, issued on Aug. 11, was assigned to Landmark Graphics Corp. (Houston).

"Calibration of drillstring weight with drag for friction factor estimation" was invented by Robello Samuel (Cypress, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method comprises determining a value of at least one oppositional force for a drillstring at multiple depths in the wellbore, determining a value of a drag force for the drillstring at the multiple depths, determining a value of hook load for the drillstring at the multiple depths based on the value of the at least one opposition force and the value of the drag force at the multiple depths, and determining...