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Unformatted text preview: Production Casing Annulus Cement Barrier and the 9‐7/8 Inch Wellhead Seal Assembly As discussed above, the following evidence weighs against the possibility that hydrocarbons flowed through the production casing annulus cement barrier and the 9‐7/8 inch wellhead seal assembly: 1) On September 9, 2010, Dril‐Quip technicians confirmed with a lead impression tool that the 9‐7/8 inch wellhead seal assembly remained properly seated in the 18‐3/4 inch high pressure housing, where it had been placed on April 19, 2010 prior to the flow of hydrocarbons. 2) On September 10, BP conducted a 30‐minute pressure test of the 9‐7/8 inch production casing annulus that confirmed the lack of annular communication. 3) On September 11, the lock‐down sleeve seal was successfully pressure tested to 5,200 psi, which tended to prove that the hanger was properly seated. 4) On September 22, Schlumberger’s logging data determined that “free” gas was not present below the BOP to 9,318 feet measured depth. 5) On October 7, BP’s...
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This note was uploaded on 01/18/2014 for the course BEPP 305 taught by Professor Nini during the Fall '11 term at UPenn.

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