US 11,742,659 B2
Generator load control
Beat Kuttel, Spring, TX (US); Tommy Scarborough, Houston, TX (US); Kevin Williams, Cypress, TX (US); Gary Pace, Cypress, TX (US); and James Garaghty, Houston, TX (US)
Assigned to NABORS DRILLING TECHNOLOGIES USA, INC., Houston, TX (US)
Filed by NABORS DRILLING TECHNOLOGIES USA, INC., Houston, TX (US)
Filed on Nov. 23, 2016, as Appl. No. 15/360,489.
Application 15/360,489 is a continuation of application No. 14/613,052, filed on Feb. 3, 2015, granted, now 9,537,315.
Claims priority of provisional application 62/010,652, filed on Jun. 11, 2014.
Claims priority of provisional application 61/935,472, filed on Feb. 4, 2014.
Prior Publication US 2017/0077705 A1, Mar. 16, 2017
Int. Cl. H02J 3/00 (2006.01); H02J 3/38 (2006.01); H02P 9/00 (2006.01); H02J 3/40 (2006.01)
CPC H02J 3/003 (2020.01) [H02J 3/00 (2013.01); H02J 3/38 (2013.01); H02J 3/40 (2013.01); H02P 9/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A power system for running an electrically driven device using a power load defining an active load when in operation comprising:
a generator, the generator having a minimum efficient load rating, the generator electrically coupled to the electrically driven device;
a load bank, the load bank electrically coupled to the generator and positioned to provide a passive load on the generator when engaged; and
a controller positioned to engage the load bank and activate the passive load, wherein a process variable for the controller is actual generator power load, and wherein a second process variable for the controller is selected from the group consisting of depth of wellbore, hook load, pump pressure, pump rate, length of drill string, weight on bit, increase or change in current, increase or change in power, and number of engines online, or any changes or requested changes thereto.