Question 3284 Deck General

70% to pass

At the instant when a string of casing being run from a MODU is landed in the well head, _______________.

A the total weight in air of the casing string is removed from the MODU
B the weight of the casing string added to the weight of the fill-up mud is removed from the MODU
C the hook load (weight of the casing string) is removed from the MODU
D the weight of the casing inside the riser is removed from the MODU
AI Explanation

The correct answer is C) the hook load (weight of the casing string) is removed from the MODU. When the casing string is landed in the well head, the weight of the casing is no longer supported by the MODU's hook, so the hook load (weight of the casing string) is removed from the MODU. This is the key principle at work. The other options are incorrect because they do not accurately describe what happens to the weight of the casing string at the moment it is landed in the well head. The total weight of the casing string, the weight of the casing plus the fill-up mud, or the weight of the casing inside the riser are not the correct quantities that are removed from the MODU.

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