accident investigation

For some reason the news story stuck in my memory.  The headline read: "Oil rig explosion near Marshall in north central Oklahoma was caused by blowout, company attorney said."  Maybe it was because I'd been reading so many stories about the natural gas boom, that a news story about an oil rig caught my attention.  It happened January 20, 2012 at the Logan Rig #7, operated by El Dorado Drilling, an affiliate of Kirkpatrick Oil.  Maybe it was the news headline's word "blowout" which stirred memories of the Deepwater Horizon Maconda rig's infamous "blowout preventers."  Maybe it was the lead…