During a long ocean tow of a jack-up the clearance in the upper guide should be reduced to zero to restrain the leg and eliminate the impact loads from dynamic responses. This is best done by __________.
• Jack-up rig leg support in transit (how the legs are secured so they don’t slam in the guides) • Role of spud cans and hull recesses/guides during a long ocean tow • How to reduce or eliminate clearance in upper guides to minimize dynamic impact loads
• Think about which option physically brings the leg and its spud cans into the most secure, locked-in position relative to the hull so there is no play in the guides. • Ask yourself: during an ocean tow, do you want the heavy spud cans hanging below the hull in the sea, or supported/protected as part of the hull structure? • Consider which choice would actually remove the gap in the upper guide, instead of just changing the shape or length of the leg.
• Which option results in the leg being fully supported by the hull structure, not partly hanging in the water? • Which option would actually reduce the guide clearance to zero rather than just modifying guide shape or leg length? • Eliminate any option that would increase exposure of the spud cans to wave action during tow.
No comments yet
Be the first to share your thoughts!