That’s right, it can operate in 3,000 meters of water, and it can drill and sample up to 150-meters below the ocean floor while being operated remotely from a ship above the drill site. [Source: Edmonton Journal. Image: Edmonton Journal]
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In Arizona, the standard of practice is to use a temporary surface casing to prevent dangerous failures like that. I once saw pictures of a drilling contractor superindendent almost get sucked into a collapsing shaft, even with the temporary casing. Pretty scary stuff. Source: Harlan Tribune. (Photo by Samantha Bruck)