US Patent Issued to Landmark Graphics on March 25 for "Systems and methods to determine torque and drag of a downhole string" (Texas Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,856, issued on March 25, was assigned to Landmark Graphics Corp. (Houston).

"Systems and methods to determine torque and drag of a downhole string" was invented by Yuan Zhang (Missouri City, Texas) and Robello Samuel (Cypress, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "The embodiments include systems and methods to determine torque and drag of a string. A method includes analyzing a plurality of continuous segments of a string deployed in a wellbore, and determining a deflection of the plurality of continuous segments from a node of the string and a tortuosity deflection of the wellbore. In response to a determination that deflection of t...