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To: FJB who wrote (357194)	4/2/2010 10:06:25 PM
From: Snowshoe	Respond to of 793896

>>It doesn't sound that big unless they got the weight seriously wrong.<< That BP Liberty rig is a land rig, so you can't directly compare it to the offshore Mars TLP. I just threw it out as an example of massive Arctic project scale in responding to KLP's question. That Liberty project is conducting offshore drilling from solid land, by drilling from the coast out under the seabed for eight miles. The torque to handle that much pipe requires a hugely powerful rig, but the overall rig weight is lower because it doesn't need the underwater supports of an offshore rig. I suspect that this "ultra extended-reach drilling" method will eventually be used to tap ANWR, by drilling from Point Thomson on its western border.