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P. 45
MALE CONTROL
POD
INTERMEDIATE SEALS
FEMALE
RECEPTACLE PACKER
LOWER
FEMALE POD
RECEPTACLE
Figure 2.10 – Koomey system for redundant hydraulic control.
(Courtesy Vetco)
Hydraulic power can be directed to a function from either
control pod through shuttle valves mounted on the operating
functions of the BOP. Two inlets to the shuttle valve are connected
to the hoses from the female receptacles of the hydraulic control
system. Inside the body of the shuttle valve, a sealing shuttle
piston moves with operating pressure from inlet to inlet, directing
the hydraulic fluid to the outlet connected to the function.
When a BOP stack employs a single female system for
control, the female receptacles are mounted on the upper frame of
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