US 12,421,947 B2
Actuator for a reciprocating pump
Bryan C. Wagner, Aledo, TX (US); and Edward Charles Kotapish, Willow Park, TX (US)
Assigned to SPM Oil & Gas Inc., Fort Worth, TX (US)
Appl. No. 17/268,393
Filed by SPM Oil & Gas Inc., Fort Worth, TX (US)
PCT Filed Aug. 16, 2019, PCT No. PCT/US2019/046939
§ 371(c)(1), (2) Date Feb. 12, 2021,
PCT Pub. No. WO2020/037283, PCT Pub. Date Feb. 20, 2020.
Claims priority of provisional application 62/753,677, filed on Oct. 31, 2018.
Claims priority of provisional application 62/719,478, filed on Aug. 17, 2018.
Prior Publication US 2021/0190053 A1, Jun. 24, 2021
Int. Cl. F04B 19/22 (2006.01); F04B 9/00 (2006.01); F04B 49/06 (2006.01)
CPC F04B 19/22 (2013.01) [F04B 9/00 (2013.01); F04B 49/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A reciprocating pump assembly comprising:
a first fluid end section having a first pressure chamber having an inlet valve and an outlet valve, and a first plunger bore that fluidly communicates with the first pressure chamber;
a first plunger rod assembly comprising a first plunger configured to be held within the first plunger bore of the first fluid end section;
a second fluid end section having a second pressure chamber having an inlet valve and an outlet valve, and a second plunger bore that fluidly communicates with the second pressure chamber;
a second plunger rod assembly comprising a second plunger configured to be held within the second plunger bore of the second fluid end section;
at least one linear actuator operatively connected to the first and second plunger rod assemblies such that the at least one linear actuator is configured to reciprocate the first and second plungers within the first and second plunger bores, respectively, during operation of the reciprocating pump to thereby pump fluid through the first and second fluid end sections; and
a controller operatively connected to the at least one first linear actuator such that the controller is configured to electronically control the at least one first linear actuator such that acceleration of the first plunger and acceleration of the second plunger are controlled to provide a substantially constant combined flow rate of fluid through the first and second fluid end sections,
wherein the combined flow rate of fluid through the first and second fluid end sections has a variation of less than 5% compared to an average combined flow rate of fluid through the first and second fluid end sections.