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:
Jan. 20, 2026
Filed:
Jul. 16, 2024
Schlumberger Technology Corporation, Sugar Land, TX (US);
Valerian Guillot, Montpellier, FR;
Alexey Ruzhnikov, Al-Khobar, SA;
Mauricio Corona, Al-Khobar, SA;
Khalid Abdelsamed M. Talha, Dhahran, SA;
Schlumberger Technology Corporation, Sugar Land, TX (US);
Abstract
A drilling fluid management system may measure drilling parameters for a downhole drilling system, the drilling parameters including standpipe pressure. A drilling fluid management system may determine, based on the drilling parameters, a mechanical specific energy (MSE). A drilling fluid management system may apply a changepoint model to the MSE and the standpipe pressure to identify a plurality of MSE segments and a plurality of pressure segments. A drilling fluid management system may identify an expected MSE and an expected pressure. A drilling fluid management system may identify an MSE segment having the segment MSE that differs from the expected MSE by an MSE threshold, and a pressure segment having the segment pressure that differs from the expected pressure by a pressure threshold. A drilling fluid management system may identify a lost-circulation period based on an overlap of the MSE segment and the pressure segment.