Question 4493Deck General70% to pass
While on an ocean tow, the COASTAL DRILLER is threatened with the approach of a severe storm. Including the time required to place the generators on-line, the approximate time required to lower the legs from a TOC (tip-of-can) position of 12.38 feet to 60.5 feet is _______________.
AI Explanation
The correct answer is D) 47 minutes.
The explanation for this is:
1) The time required to lower the legs from a TOC (tip-of-can) position of 12.38 feet to 60.5 feet is approximately 47 minutes, including the time required to place the generators on-line.
2) This is based on the typical lowering rate of offshore jack-up rigs, which is around 1 foot per minute. Given the leg extension of 48.12 feet (60.5 - 12.38), the total time required would be around 47-48 minutes.
3) The other options are incorrect because they do not accurately reflect the typical time required for this operation.
4) The key is understanding the typical leg lowering rate for offshore jack-up rigs and applying it to the given leg extension distance.
Related Questions
#4491 While preparing for a storm when elevated, the total weight of the COASTAL DRILLER is 14,150 kips, LM are 1,712,150 ft-kips, and TM are -9,905 ft-kips. The starboard leg reaction is _______________.#4492 While preparing for a storm when elevated, the total weight of the COASTAL DRILLER is 14,150 kips. LM are 1,712,150 ft-kips, and TM are -9,905 ft-kips. The port leg reaction is _______________.#4494 The COASTAL DRILLER, in transit with winds expected to exceed 70 knots, must lower the legs so that the can tips are _______________.#4495 The COASTAL DRILLER, in transit with winds expected to exceed 70 knots, must lower the legs to 60.5 feet below the hull in order to meet the requirements for stability and _______________.#4496 In an emergency, the jacking system on the COASTAL DRILLER is capable of elevating the unit with a loading of _______________.