Control system for subsea well-heads

Claim 1

A control system for subsea well-heads comprising: an above-water control system including a control panel arrangement for initiating predetermined commands to the well-heads, a logic circuit connected thereto to provide an output control signal designated by the control panel, a first receiver and a first transmitter activated by the output signal, a plurality of different transmission links coupled to the transmitter and receiver, at least one of which is utilized by the first transmitter and receiver, an underwater control unit including a second receiver to receive the output control signals and a second transmitter to provide feedback signals to the first receiver both coupled to the transmission links and a logic circuit connected to the second transmitter and the second receiver to direct the appropriate signals to the well-heads, and, an electric-hydraulic unit connected to the underwater control unit and the well-heads for receiving signals from the logic circuit and actuating the well-heads in accordance therewith comprising a container partitioned into an upper and lower chamber having an interconnection plate therebetween, the upper chamber including an electrical interface wherein the signals from the underwater control unit are converted into hydraulic signals, and the lower chamber including a hydraulic unit coupled to the well-heads, a hydraulic pump and a motor for driving said pump activated by the electrical interface.