| 摘要 |
In one embodiment, the automated riser recoil control system (10) includes a plurality of riser tensioners (20), a vessel heave measurement system (210), and a control processor (70) in electrical communication with the heave measurement system (210) and riser tensioners (20). Each tensioner (20) includes a piston travel indicator (27) which signals the processor (70). In another embodiment, a method for adjusting at least one of the tension forces (F1, F2) applied by the tensioners (20) to the riser (60) includes determining piston travel velocity for each riser tensioner (20), measuring vessel heave velocity, calculating the differences between each of the piston travel velocities and the heave velocity, and adjusting the tension force when some preselected number of the velocity differences exceeds a preselected critical velocity difference. Tension force control is typically effected by throttling at least one fluid flow rate within one or more riser tensioner (20).
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