US 11,697,989 B2
Micro invisible lost time in drilling operations
Manish K. Mittal, Cypress, TX (US); and Robello Samuel, Cypress, TX (US)
Assigned to Landmark Graphics Corporation, Houston, TX (US)
Filed by Landmark Graphics Corporation, Houston, TX (US)
Filed on Aug. 27, 2020, as Appl. No. 17/4,175.
Prior Publication US 2022/0065093 A1, Mar. 3, 2022
Int. Cl. E21B 44/00 (2006.01); E21B 44/08 (2006.01); E21B 47/003 (2012.01); E21B 49/00 (2006.01); E21B 45/00 (2006.01); G06Q 10/0639 (2023.01)
CPC E21B 44/08 (2013.01) [E21B 44/00 (2013.01); E21B 45/00 (2013.01); E21B 47/003 (2020.05); E21B 49/003 (2013.01); G06Q 10/06393 (2013.01)] 20 Claims
OG exemplary drawing
 
8. A method comprising:
receiving time-stamp data about a drilling operation;
filtering the time-stamp data to remove outliers based on pre-set rules formed from historical data of existing wellbores, the filtering creating a cleaned time-stamp dataset, the cleaned time-stamp data including values for drilling parameters associated with different time frames corresponding to a recorded data rate;
classifying the values for the drilling parameters into a rig state that represents a status for the drilling operation, the rig state involving a plurality of rig activities;
for each respective rig activity of the plurality of rig activities:
determining an actual completion time;
comparing the actual completion time to an expected completion time associated with the respective rig activity to determine a deviation for the respective rig activity, the deviation being a difference between the actual completion time and the expected completion time associated with the respective rig activity; and
identifying, as one or more deviated activities, one or more rig activities of the plurality of rig activities for which the deviation is greater than a pre-set threshold;
combining deviations for the respective rig activities into micro invisible lost time that represents invisible lost time in one or more time frames corresponding to the recorded data rate; and
controlling a drilling operation using the micro invisible lost time.