| CPC E21B 33/076 (2013.01) [E21B 33/0355 (2013.01)] | 19 Claims |
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1. An intervention system for a subsea well operation, the intervention system comprising:
a first coupling portion;
a second coupling portion releasably coupled to the first coupling portion, the first coupling portion and the second coupling portion configured to provide communication between a vessel and a subsea well while the first coupling portion and the second coupling portion are connected to one another;
a monitor tether coupled to one of the first coupling portion and the second coupling portion, the monitor tether configured to transmit an electrical current while the first coupling portion and the second coupling portion are connected to one another; and
a control system operable to
detect a change in current in the monitor tether indicative of disconnection between the first coupling portion and the second coupling portion, and
in response to detecting the change in the current in the monitor tether indicative of the disconnection, interrupt fluid flow relative to the subsea well.
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