turbo
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Our local paper printed an AP report regarding the frequency of blowout preventer failure. It seems that they aren't too foolproof.
Still:
Unprecedented? As in never happened before? To borrow a line from Inigo Montoya (Princess Bride): You keep using that word. I do not think it means what you think it means.
http://www.google.com/hostednews/ap/article/ALeqM5g5Ne4XXtnk-mPq3yqkwj_jh3ST3wD9FIQI6O0
To hear some industry officials talk, these devices are virtually foolproof.
But a detailed AP review shows that reliability questions have long shadowed blowout preventers:
_ Accident reports from the U.S. Minerals Management Service, a branch of the Interior Department, show that the devices have failed or otherwise played a role in at least 14 accidents, mostly since 2005.
_ Government and industry reports have raised questions about the reliability of blowout preventers for more than a decade. A 2003 report by Transocean, the owner of the destroyed rig, said: "Floating drilling rig downtime due to poor BOP reliability is a common and very costly issue confronting all offshore drilling contractors."
_ Lawsuits have fingered these valves as a factor in previous blowouts.
But the agency, known as MMS, then did its turnaround and required tests half as often. It estimated that the rule would yield an annual savings of up to $340,000 per rig. An industry executive praised the "flexibility" of regulators, long plagued with accusations that it has been too cozy with the industry it supervises.
Laurence Power, of Robert Gordon University in Aberdeen, Scotland, an engineering teacher who has studied these valves in offshore oil wells, said he has "not been able to see their logic" for reducing the frequency of testing.
In 1999, right after that rule change, an MMS-commissioned report by a research group identified 117 blowout preventer failures at deepwater rigs within the previous year. These breakdowns created 3,638 hours of lost time — a 4 percent chunk of drilling time.
In 2004, an engineering study for federal regulators said only 3 of 14 new devices could shear pipe, as sometimes required to check leaks, at maximum rated depths. Only half of operators accepting a newly built device tested this function during commissioning or acceptance, according to the report.
Still:
After the accident, BP CEO Tony Hayward said of blowout preventers in general: "It's unprecedented for it to fail."
Unprecedented? As in never happened before? To borrow a line from Inigo Montoya (Princess Bride): You keep using that word. I do not think it means what you think it means.
http://www.google.com/hostednews/ap/article/ALeqM5g5Ne4XXtnk-mPq3yqkwj_jh3ST3wD9FIQI6O0
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