Instead of using a marine riser, the coil tube is kept in tension between the vessel and the subsea injector by means of a second injector installed on board. The actual tube does not rotate, only pressurized fluid inside the coil activates a hydraulic motor which makes the bit rotate. The subsea injector pushes and pulls the coil tube in and out of the well.
Today these operations are performed by using a marine riser from a rig, which one can feed the coil tube down into. This is both expensive and time-consuming.
Summer 2014 we delivered a control system to Island Offshore Subsea Injector. The Injector was a prototype project for a new type of drilling method from offshore well intervention vessels and was tested by drilling core samples of the bedrock in connection with the Rogfast tunnell below the sea outside Stavanger City.
Island Offshore recently made history when they successfully drilled a pilot hole for Centrica Energy by means of open water coil tubing. This technology has never been utilized in the offshore industry before and proves to be a safer and cheaper alternative to traditional drilling using a rig
Three graphical user interfaces were made for Injector control, Heave control and data logging of the operation. A atmospheric canister with our control system circuit boards was used to control lights, cameras, hydraulic valves and sensor inputs.