Lots of Ink: BP testing its cap on the blown well. So, what does this mean for all the UNblown wells’ safety?
Thursday, July 15th, 2010
Just an idle question here. As sampled below, and as all you know already, a small army of reporters is hanging on in hope to be able to write in the next day or so that BP, after these long months, has managed to clamp a real big faucet on top of the failed BOP, or blowout preventer, that didn’t. They’ll just turn it off like a dripping tap that’s been fitted with a new washer. The suspense is focussed on pressure: will the well casing below this new hardware burst from the pressure – or is it already cracked and set to start leaking badly – when the rising column of crude is stopped from exiting the top? Will insidious flows into shallow sediments eventually reach the surface, perhaps compounding the problem (although how-so evades me, as the ultimate, relief well spill-killer should intercept the stuff before it reaches shallower levels).
Here is the question: If there is worry that shutting off the flow will burst the pipe in this case, how is this case and casing different from what are beneath all the other deep-water, or any-depth, wellheads out there? Don’t they all have BOPs? Aren’t they all equipped with less-drastic ways to cut off the flow of oil, such as when rigs have to be moved for storms or are being swapped from exploration to production facilities? Why aren’t those drill pipes equally prone to burst or leak?
Reporters as well as federal regulators and other industry watchdogs should be asking for a full accounting that compares the worry over this maneuver to routine modulations of flows from other wells. The explosion and sinking of the Deepwater Horizon rig did not, as far as I’ve heard in press accounts, pose any particular hazard to the well casing beneath the B.O.P. But now we learn that merely turning off the flow might burst the pipe down there. There may be reason that this is not the case for other facilities. I don’t recall reading any reasons why that may be so. It could be all the unconstrained flow and failed mud-plugging did some damage, I suppose. (LATE ADDITION: See comments for more on that.) Any way one cuts it, we have here further argument for a complete re-think and re-design of undersea drilling equipment to enhance its ease of repair when it breaks down.
A few recent hope-the-cap-is-a-corker stories:
- Bloomberg: BP Plans to Start Test on Leaking Gulf Well Today ;
- Reuters – Kristen Hays, Matt Scuffham: BP says key test on blown Gulf well to start soon ;
- BBC – Vital BP oil well test back on course after setback ; Includes video of coast guard admiral with his sitrep.
Grist for the Mill: BP Press Release ;
- Charlie Petit