Thelostcirculationmaterialmaterial

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Unformatted text preview: perforation of the 9‐7/8 inch casing between 9,176 feet and 9,186 feet found that no u‐tube flow occurred from the casing to annulus. 6) During well intervention operations, ROV observation determined the wellhead seal assembly was intact. In addition, subsequent to removing a portion of the 9‐7/8 inch production casing, original 13.8‐14.0 ppg mud was discovered between the 16 inch intermediate casing and 9‐7/8 inch production casing. 7) Pictures taken from the DDII relief well rig at the time the hanger and seal assembly were extracted from outside hanger and seal assembly showed no signs of erosion from annular flow. Based on this evidence, the Panel concluded that hydrocarbons did not flow from the production casing annulus cement barrier and the 9‐7/8 inch wellhead seal assembly during the blowout. 73 2. Production Casing and Related Components from above the Top Wiper Plug at 18,115 Feet The 9‐7/8 x 7 inch production casing and related components (including the 9‐7/8 x 7 inch cross‐over sub and centralizer subs) wer...
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