US 12,247,452 B2
Systems for reducing fluid hammer in subsea systems
Craig McCormick, Houston, TX (US); Scott Reynolds, Houston, TX (US); Robert Mebane, Houston, TX (US); Mete Mutlu, Houston, TX (US); and Jean Paul Buisine, Houston, TX (US)
Assigned to TRANSOCEAN OFFSHORE DEEPWATER DRILLING INC., Houston, TX (US)
Filed by TRANSOCEAN OFFSHORE DEEPWATER DRILLING INC., Houston, TX (US)
Filed on Dec. 27, 2022, as Appl. No. 18/088,993.
Claims priority of provisional application 63/293,866, filed on Dec. 27, 2021.
Prior Publication US 2023/0203905 A1, Jun. 29, 2023
Int. Cl. E21B 47/09 (2012.01); E21B 33/035 (2006.01); E21B 33/038 (2006.01); E21B 33/06 (2006.01)
CPC E21B 33/0355 (2013.01) 24 Claims
OG exemplary drawing
 
1. A pumping system comprising:
a plurality of pumps each having an inlet and an outlet, the inlet being fluidly coupled to a reservoir configured to provide a hydraulic fluid, the outlet being fluidly coupled to a control pod having a valve and a pair of sensors configured to monitor an upstream pressure and a downstream pressure of the valve, wherein the control pod is fluidly coupled to a subsea blowout preventer;
a first motor coupled to a first pump of the plurality of pumps and configured to set the first pump at a first predetermined pressure;
a controller coupled to the first motor and configured to control the first motor, thereby controlling the first pump;
wherein the pumping system is configured to:
engage and disengage each pump independently; and
de-stroke each pump to limit pressure to the valve of the control pod, when a predetermined pressure for each pump is attained, thereby reducing fluid hammer at the control pod.