US 12,258,980 B2
Subsea hydraulic pressure boosting and regulating system
Mitch Terhune, Williamsburg, MI (US); Jared Schlueter, Traverse City, MI (US); and Joshua B. Groves, Sisters, OR (US)
Assigned to The Oilgear Company, Traverse City, MI (US)
Filed by The Oilgear Company, Traverse City, MI (US)
Filed on Aug. 1, 2022, as Appl. No. 17/878,605.
Application 17/878,605 is a continuation of application No. 17/140,936, filed on Jan. 4, 2021, granted, now 11,401,954.
Claims priority of provisional application 62/957,038, filed on Jan. 3, 2020.
Prior Publication US 2023/0058722 A1, Feb. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F15B 11/032 (2006.01); F15B 1/027 (2006.01); E21B 33/035 (2006.01)
CPC F15B 11/032 (2013.01) [F15B 1/027 (2013.01); E21B 33/035 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A system comprising:
at least one hydraulic intensifier circuit accepting a supply pressure and returning a boosted pressure that is higher than the supply pressure; and
at least one regulator that accepts the boosted pressure and returns a regulated lower, regulated pressure that is lower than the boosted pressure;
wherein the hydraulic intensifier circuit further comprises:
a reciprocating piston having a first side and an opposed second side, each of the first and second side having with a larger low-pressure region and a smaller high pressure region;
a first three-way control valve selecting for supply pressure or vent to the first side low pressure region of the reciprocating piston; and
a second three-way control valve selecting for supply pressure or vent to the second side low pressure region of the reciprocating piston
wherein a low pressure applied to the first side low pressure region moves the piston to create a high pressure on the second side high pressure region; and
wherein the low pressure applied to the second side low pressure region moves the piston to create the high pressure on the first side high pressure region;
wherein the second control valve pilots the first control valve; and
wherein the piston, when making a first movement toward the second side closes a first two-way valve thereby blocking vent to a pilot port of the second control valve.