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[Marks DTM Calib]

An interesting little watch:

http://www.csb.gov/videos/deepwater-horizon-blowout-animation/

[Entwood]

Very interesting .. but just how did all the miswiring get missed ??

[cem_devecioglu]

oil wells may have pressures over 5-6000 psi .. and its a know fact that drilling mud and bops and other equipments wont suffice in some cases.. drilling history is full of them     its so usual that not different than smashing the car to somewhere else..  and whatever precaution you have , nature can always beat you..


in the wells that I worked in my summer training workers were killed by steel wires that were ruptured

[Varche]

thanks.

[Marks DTM Calib]

The modern BOP's can withstand pressures more than double that 

As for the wiring being missed, its VERY difficult to test a BOP after a repair or similar without shipping it back to the OEM (was it Cameon in this case?) and when the day rate is half a million dollars, these things get bodged back together, checked as best they can, and deployed. There is a actualy a further actuation method that they didn't mention which is via acoustics (supplied by either Sonardyne or Kongsberg) so not the end of the world that such faults were present (even if they shouldn't be present).

The fundamental issue to me is that the cut off and crimp tools cant cut off and crimp across the entire width of the riser.

But it is a good little video presentation of the causes.

[omega3000]

87 days  Interesting information 

[Marks DTM Calib]

Yes, because when the BOP fails to arrest the flow then you are left with the pleasure of drilling a new well to intercept the failed one so you can divert the pressure and plus the failed well head.

That takes time (as you need to obtain and get in place a second drill ship/rig/semisub and associated kit)