Patent ID: 11873699
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E  F  G | IPC E  F  G

Claim 11:
12. An apparatus comprising:
a first hydraulic conduit and a second hydraulic conduit;
a shuttle valve coupled with the first and second hydraulic conduits and coupled by a third hydraulic conduit with a normally closed (NC) solenoid valve (SOV);
a check valve coupled by a fourth hydraulic conduit with the NC SOV and coupled with the second hydraulic conduit;
a dynamic flow restrictor that is coupled by a fifth hydraulic conduit with the NC SOV and coupled by a sixth hydraulic conduit with a first and a second inverse shuttle valves;
the first inverse shuttle valve coupled with the second hydraulic conduit and coupled with a seventh hydraulic conduit; and
the second inverse shuttle valve coupled with the first hydraulic conduit and coupled with an eighth hydraulic conduit, wherein the seventh and eighth hydraulic conduits are adapted to couple with a control valve external to the apparatus.