Patent ID: 7530399
Filing Date: 2009-05-12
Classification: E21B

Abstract:
1. A delivery system, adapted to be mounted on a floating vessel, the delivery system comprising an elongate delivery member for downhole use in a well, an injector to control the insertion of the delivery member into the well, and a storage device to store at least a portion of the delivery member prior to insertion into the well, the system having a first motion compensator acting on the storage device and arranged to compensate for heave-related relative motion between the injector and the storage device, and a separate, second motion compensator acting on the injector and arranged to compensate for heave-related relative movement between the floating vessel and the well, wherein the delivery system further includes a motion controller, and wherein the movement of the motion compensator on the storage device and the movement of the motion compensator on the injector are coordinated by the motion controller.