Question 5101Deck General70% to pass
While drilling loaded as shown in Sample Load Form #4 (Drilling), the DEEP DRILLER suffers a sudden unexpected forward inclination. The wind and waves are light from the starboard bow. Among the possible causes, you should consider _______________.
AI Explanation
You are correct that the answer is B) the drill string has broken.
The sudden unexpected forward inclination of the DEEP DRILLER while drilling loaded is most likely caused by a failure or breakage of the drill string. A broken drill string would cause the drilling platform to suddenly shift forward due to the loss of the stabilizing force of the drill string extending down into the seabed.
The other options are less likely causes. Failure of mooring lines would cause a different type of destabilization, dumping mud would not directly cause a forward inclination, and ballast tank equalization would not create such an abrupt change in the platform's attitude.
Related Questions
#5099 The DEEP DRILLER is loaded as shown in the Sample Load Form #5 (Survival) when an unexpected slowly increasing port list and bow down trim occurs. A leak in C1P is found. By deballasting from ballast tanks 2P and 3P, the inclination slowly decreases. The increase in the transverse free surface correction is _______________.#5100 The DEEP DRILLER is loaded as shown in the Sample Load Form #5 (Survival), when an unexpected, slowly increasing port list and bow down trim occurs. A leak in C1P is found. By deballasting from ballast tanks 2P and 3P, the inclination slowly decreases. The increase in the longitudinal free surface correction is _______________.#5102 While drilling loaded as shown in Sample Load Form #4 (Drilling), the DEEP DRILLER suffers a sudden unexpected inclination to port and aft. Strong winds and high waves are from the starboard bow. Among the possible causes, you should consider _______________.#5103 While drilling loaded as shown in Sample Load Form #4 (Drilling), the DEEP DRILLER suffers a sudden unexpected inclination to starboard and aft. Strong wind and high waves are on the port bow. Among the possible causes, you should consider _______________.#5104 When extracting the legs from the soil, the hull of the COASTAL DRILLER may be pulled down until the draft is _______________.