... Abstract On a floating vessel or rig, heave can cause severe disturbances in the returning mud flow from the marine riser into the Flow Line. This effect is due to the changing height of the outflow point of the marine riser with respect to the sea bed. Thus the heave can be considered...

... The surface handling system is fully heave compensated using an inertial sensor to measure vertical displacement. The information is fed into a computer which operates the hydraulics of the lifting winch when it is in the heave compensation mode. The system is similar to that used in British...