US 11,655,690 B2
Borehole cleaning monitoring and advisory system
Mohammed Murif Al-Rubaii, Dammam (SA); Eno Itam Omini, Dhahran (SA); and Bader M. Alotaibi, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Aug. 20, 2021, as Appl. No. 17/408,123.
Prior Publication US 2023/0057364 A1, Feb. 23, 2023
Int. Cl. E21B 37/00 (2006.01); E21B 47/007 (2012.01); E21B 45/00 (2006.01)
CPC E21B 37/00 (2013.01) [E21B 45/00 (2013.01); E21B 47/007 (2020.05); E21B 2200/20 (2020.05)] 15 Claims
OG exemplary drawing
 
1. A computer-implemented method, comprising:
receiving real-time drilling data of a drilling operation of drilling a wellbore by a drilling system;
using the real-time drilling data to calculate a modified carrying capacity index (CCI), a modified cuttings concentration in annulus (CCA), and a transport ratio (TR) of the drilling operation;
generating a respective color-coded indicator of each of the CCI, CCA, and TR by comparing each of the CCI, CCA, and TR to a respective predetermined range;
detecting, based on the respective color-coded indicators, a drilling problem with the drilling operation;
determining, based on a table of corrective actions, a corrective action to mitigate the drilling problem, wherein the table of corrective actions maps different values of the respective color-coded indicators to corrective actions, wherein the corrective action comprises controlling a rate of penetration of a drilling tool of the drilling system to be less than a maximum penetration rate;
determining the maximum rate of penetration based on an effective drilling fluid density, a pore pressure limit of a formation, and a fracture pressure limit of the formation;
determining, based on the real-time drilling data, the maximum rate of penetration for the drilling tool; and
controlling the drilling tool such that the rate of penetration of the drilling tool is less than or equal to the maximum rate of penetration, thereby mitigating the drilling problem.