Well intervention control systems can be used for work over controls (IWOCS), early production riser (EPR) systems or drill pipe riser (DPR) systems. As well as well intervention the systems are used for christmas tree running, tubing hanger running, surface test trees, in riser and open sea operation for well testing and early production.

Surface systems are optimised to maintain flexibility and minimise the deck space requirements. These include hydraulic power and control unit, local control cabin for operation control, local shutdown panels, remote operation panel typically on the drill floor, umbilicals and reelers.

Subsea, the system can be directly connected into the christmas tree stack using a remotely operated vehicle (ROV) stabplate, or controlled using a multiplex subsea control module mounted either above or below the emergency disconnect system. Subsea control and monitoring is then relayed back to the local equipment room (LER) control cabin on the drill rig and the drill floor.