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Politics : Politics for Pros- moderated

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To: arno who wrote (361980)	4/30/2010 7:56:29 AM
From: Brumar89	Read Replies (3) of 793954

Hit an unexpectedly higher pressure than 'normal' gas zone. .... I've read they'd hit total depth, weren't drilling, but were cementing the casing. Blowouts have happened during this phase: ... A 2007 MMS study found that although blowouts with offshore drilling operations were becoming less frequent, less deadly and less polluting, cementing-associated troubles persisted. Cementing problems were associated with 18 of 39 blowouts between 1992 and 2006 .... In a different hemisphere last August, another oil rig blowout sent thousands of barrels of oil spilling into the Timor Sea near Indonesia and East Timor. The culprit: a problem during cementing, which is supposed to keep gases and oil from shooting skyward and exploding into fire. That accident and the blast on the Deepwater Horizon had at least one circumstance in common. Both happened in a transition period when the offshore oil wells were being capped off and the gaps around drilling casings were being cemented shut to prevent pressurized gases and oil from escaping. ... chron.com

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