Multi-activity offshore exploration and/or development drill met

Details Multi-activity offshore exploration and/or development drill met Multi-activity offshore exploration and/or development drill met

1996-05-03

2000-07-11

Bagnell, David J

Boring or penetrating the earth

Boring a submerged formation

Boring from floating support with submerged independent...

4051951, E21B 1502, B63B 3544

Patent

active

060858516

ABSTRACT:
A multi-activity driliship, or the like, method and apparatus having a single derrick and multiple tubular activity stations within the derrick wherein primary drilling activity may be conducted from the derrick and simultaneously auxiliary drilling activity may be conducted from the same derrick to reduce the length of the primary drilling activity critical path.

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