Question 4463Deck General70% to pass
For a semisubmersible moored in heavy weather conditions, the weather lines should be adjusted so that several lines carry about the same tension, and the leeward lines are _______________.
AI Explanation
The correct answer is B) paid out to reduce weather mooring line tensions.
In heavy weather conditions, semisubmersible rigs need to have their weather mooring lines adjusted to balance the tensions across all the lines. By paying out the leeward lines, this reduces the tension on those lines and helps distribute the load more evenly across the mooring system. This helps prevent excessive tension on any single line, which could lead to failure.
The other options are incorrect because: A) adjusting the chain length along the bottom is not the primary concern for balancing mooring line tensions, C) tensioning the leeward lines would increase the imbalance, and D) the vertical component of chain tension is less relevant than the overall balanced tension across all the lines.
Related Questions
#4461 You should consider placing the drilling operations of the DEEP DRILLER in standby when _______________.#4462 The DEEP DRILLER is loaded as shown in Sample Load Form #4, (Drilling). In preparing for approaching heavy weather, the four leeward mooring lines are slacked. These actions reduce the _______________.#4464 When clear ice is present while drilling, the vertical transverse moments of the DEEP DRILLER are increased by _______________.#4465 In storm conditions, when the DEEP DRILLER is in 600 feet water depth, and the high-line tension (HLT) is 350 kips, completely slacking the two leeward mooring line tensions reduces the HLT to _______________.#4466 In storm conditions, with the wind and waves from the starboard bow of the DEEP DRILLER in 400 feet water depth, the offset is 7%. Completely slacking mooring lines 7 and 8 reduces the offset to _______________.