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 __________.
• Review how to calculate distance traveled when lowering the legs from one position to another (final TOC minus initial TOC). • Recall the rate of leg lowering (feet per minute) for this type of unit from your reference material or previous questions in the set. • Remember to include any fixed setup / generator start time in addition to the actual lowering time.
• First, how many feet total do the legs need to move between 12.38 feet and 60.5 feet? • If you know the lowering speed in feet per minute, how long will it take to travel that distance? Then, how do you add the time needed to place generators on-line? • Once you find the total minutes, which option is closest to your calculated time?
• Be sure you subtract initial TOC from final TOC correctly to get the travel distance. • Confirm that you are using the correct leg-lowering rate (ft/min) as stated or implied in your study materials for COASTAL DRILLER. • Do not forget to add the generator start / setup time to the pure mechanical lowering time before comparing to the choices.
No comments yet
Be the first to share your thoughts!