"olympusE1" wrote in message
oups.com...
...oh, constructing a caisson underwater in a swamp, emptying it,
drilling a hole through an inch or so of hardened steel to get at
crude oil at roughly 600 PSI, capping and tapping the hole, and then
grabbing 1000 metric tonnes or so of crude... the usual.

Nothing particularly difficult about the caisson, but I wonder why it would
be needed. Why not use diving gear?

As others have stated, the hardware to tap the pipe is common. I have seen
it in use by our local water utility.

Vaughn