ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,991, issued on July 29, was assigned to Helmerich & Payne Technologies LLC (Tulsa, Okla.).
"Systems and methods for zeroing for drilling" was invented by Zackary Whitlow (Denver) and Ngoc-Ha Dao (Meyzieu, France).
According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments use a torque-and-drag model or fluid friction model for predicting a zero tension or zero pressure for various operations such as rotary drilling and sliding, in vertical, curve, and lateral sections of a well, without using a downhole sensor. By adjusting coefficients of friction, the model can be used to match the predicted hook load, torque, and pressure values with the measured h...