Thanks Sam a very useful post.  It is important to note that these are not all oil rigs; many are extracting gas.  Also, although the ocean depth is important, because it compels the use of unmanned equipment, the depth of the drill hole is at least as important, because of the very high gas pressures at great depths below the ocean floor.

On 6/12/2010 8:52 PM, SAM ANDERSON wrote:
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Here's are maps of Gulf of Mexico Drillings....