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Unformatted text preview: Flow Up the Annulus and Through the Seal Assembly The seal assembly is a metal element that is the interface between the casing hanger and the wellhead. 151 61 On April 19, the day before the blowout, BP pumped cement down the production casing and up into the wellbore annulus above the uppermost hydrocarbon reservoir to prevent hydrocarbons from entering the wellbore. As discussed above, the annulus cement that was placed across the main hydrocarbon zone was a lower density, nitrified (foam) cement slurry. At the time of the blowout, the seal assembly had not yet been mechanically locked to the wellhead housing. To analyze the probability of this scenario the Panel commissioned Keystone Engineering Inc. (“Keystone”) to conduct a buoyancy casing analysis. Keystone analyzed eight production casing static force conditions that could have acted upon the production casing and wellhead hanger, and possibly resulted in movement of the casing. Keystone’s analysis found that six of these eight scenarios were u...
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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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