Patent ID: 7934547

Claim:
An apparatus, comprising: a downhole tool configured for conveyance within a wellbore penetrating a subterranean formation, wherein the downhole tool comprises: a reservoir containing hydraulic fluid; a hydraulically actuatable device including at least one chamber configured to receive pressurized hydraulic fluid; a first hydraulic pump having an inlet fluidly coupled to the reservoir and an outlet fluidly coupled to the at least one chamber; a second hydraulic pump having an inlet fluidly coupled to the reservoir and an outlet fluidly coupled to the at least one chamber; at least one motor operatively coupled to at least one of the first and second hydraulic pumps; and means for selectively flowing hydraulic fluid from the outlet of at least one of the first and second pumps to the at least one chamber; wherein a maximum flow rate of the second hydraulic pump is greater than a maximum flow rate of the first hydraulic pump.