US 11,989,012 B2
Method and apparatus to automate pump-down operation
Atchyuta Ramayya Venna, Houston, TX (US); and Sudhir Kumar 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. 31, 2020, as Appl. No. 17/007,098.
Claims priority of provisional application 62/979,108, filed on Feb. 20, 2020.
Prior Publication US 2021/0262303 A1, Aug. 26, 2021
Int. Cl. G05B 19/43 (2006.01); E21B 7/06 (2006.01); E21B 23/10 (2006.01); E21B 23/14 (2006.01); E21B 43/116 (2006.01); E21B 43/12 (2006.01); E21B 44/02 (2006.01); E21B 47/01 (2012.01); E21B 47/12 (2012.01)
CPC G05B 19/43 (2013.01) [E21B 7/068 (2013.01); E21B 23/10 (2013.01); E21B 23/14 (2013.01); E21B 43/116 (2013.01); E21B 43/128 (2013.01); E21B 44/02 (2013.01); E21B 47/01 (2013.01); E21B 47/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a winch controller configured to control a line speed of a support cable for conveying a wireline tool string down a section of a wellbore;
a pump controller configured to control a pumprate of a hydraulic pump; and
a control module configured to communicate with the winch controller and the hydraulic pump, the control module further configured to:
generate a line speed signal for controlling a line speed of the support cable and a pumprate signal to control a pumprate of a hydraulic fluid in the wellbore;
determine a first error between a target value for downhole tension of the support cable and a measured value of the downhole tension;
determine a second error between a recommended job speed and an actual line speed; and
maintain the target value for the downhole tension by simultaneously controlling the line speed of the support cable and the pumprate of the hydraulic fluid using a value for the line speed signal and a value for the pumprate signal generated based on the first and second errors.