If a severe storm threatens the COASTAL DRILLER while elevated, the setback in the derrick should be lowered and placed in the pipe rack. Its weight should be accounted for as __________.
• Jack-up rig loading categories (fixed, variable, environmental) • How storm preparation changes the status of equipment that is normally in use • Difference between structural weight and operational/drilling loads
• Ask yourself: when you LOWER the setback and STORE it in the pipe rack, is it now part of the permanent structure, something that can be moved/changed, or a load caused by wind/waves? • Think about how weight that can be added or removed between jobs is normally classified in stability and leg/water depth calculations. • Consider whether this stored weight will still be there after the storm and between different operations, or if it can be relocated or offloaded.
• Verify how your study materials define fixed weight versus variable loads on a jack-up rig. • Check whether environmental loads are due to weather forces (wind, waves, current) or due to equipment weight. • Confirm whether drilling loads refer to active drilling operations or to stored tubulars and equipment not currently being used.
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