US Patent Issued to Landmark Graphics on Sept. 15 for "Calculating pull for a stuck drill string" (Texas Inventors)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,735,953, issued on Sept. 15, was assigned to Landmark Graphics Corp. Inc. (Houston).

"Calculating pull for a stuck drill string" was invented by Robello Samuel (Cypress, Texas) and Rishi Adari (Katy, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure presents processes and methods for determining an overpull force for a stuck drill string in a borehole system. The fluid composition of a mud in the borehole at a specified depth can be broken down into a percentage of liquid and percentage of solids, as well as adjusting for material sag and settling factors. The fluid composition can be utilized to identify friction factors and drag in ...