US 12,247,449 B2
Model based adaptive control scheme for pump down operation
Jian Wu, Houston, TX (US); Atchyuta Ramayya Venna, Houston, TX (US); Siyang Song, Houston, TX (US); Robert P. Darbe, Tomball, TX (US); and Sudhir Gupta, Kingwood, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Aug. 5, 2021, as Appl. No. 17/394,700.
Prior Publication US 2023/0038625 A1, Feb. 9, 2023
Int. Cl. E21B 23/14 (2006.01); E21B 23/08 (2006.01); G05D 11/00 (2006.01)
CPC E21B 23/14 (2013.01) [E21B 23/08 (2013.01); G05D 11/008 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for a pump down operation comprising:
a controller disposed on an information handling system and configured to identify a difference between a downhole tension set-point to an actual downhole tension;
a motor drive connected to the information handling system and configured to adjust a line speed set-point of the motor drive based at least in part on the difference from the controller to create an actual line speed from the motor drive to follow the downhole tension set-point;
a parameter estimation unit disposed on the information handling system and connected to the motor drive, configured to produce a fluid drag coefficient, a friction coefficient, and a line speed delay constant; and
a controller design unit disposed on the information handling system and connected to at least the parameter estimation unit and the controller, configured to send one or more control gains to the controller based at least in part on the fluid drag coefficient, the friction coefficient, and the line speed delay constant, wherein the line speed delay constant identifies a time delay between a line speed of the motor drive and a velocity of a downhole tool and is calculated using a depth of the wireline in the wellbore a La speed of sound in the wireline.