Question 4626Deck General70% to pass
While drilling ahead with 60 foot draft, the DEEP DRILLER encounters lost circulation and loses 900 Bbls. of 16 pounds per gallon mud to the hole. How much ballast must be taken on to maintain 60 foot draft?
AI Explanation
The correct answer is B) 270 long tons.
The reason is that the loss of 900 barrels of 16 pounds per gallon mud would result in a reduction in the weight of the drilling fluid, which needs to be compensated by taking on additional ballast to maintain the 60-foot draft. Assuming a density of 16 pounds per gallon, the loss of 900 barrels of mud would be equivalent to a weight reduction of approximately 270 long tons. Therefore, the DEEP DRILLER would need to take on 270 long tons of ballast to maintain the 60-foot draft.
The other options are incorrect because they do not accurately reflect the weight of the lost mud and the required ballast to compensate for it.
Related Questions
#4624 The DEEP DRILLER is loaded as shown in the Sample Load Form #2 (Ballasting to Survival). What is the new height of the transverse metacenter if all the bulk materials are discharged? #4625 The DEEP DRILLER, at a draft of 45 feet and total vertical moments of 981,567 ft- long tons, floods 2068.7 long tons of sea water through the overboard discharge into tanks 3 and 8 on both sides. The VCG of the added ballast is 7.22 feet. The shift in the height of the center of gravity is _______________.#4627 For a floating MODU, the center of flotation is the point in the waterplane _______________.#4628 The DEEP DRILLER is loaded as shown in the Sample Load Form #1 (transit). What is the new metacentric height corrected for transverse free surface effects if the entire contents of Salt Water Ballast Tanks 1P and 1S are discharged? (Use KMT = 375.38 feet) #4629 The most important consideration in the event the Deep Driller suffers damage is _______________.