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Unformatted text preview: ews pump into a well to separate the drilling mud from seawater. Displacement of mud and spacer are part of the temporary abandonment procedures discussed in detail in Section IV of the findings and conclusions. 44 Sperry‐Sun rig data, April 20, 2010. The crew performed a sheen test to confirm that all of the oil‐based mud had been displaced from the riser. A “sheen test” is intended to indicate the presence of free oil when drilling fluid, drilled cuttings, deck drainage, well treatment fluids, completion and workover fluids, produced water or sand or excess cement slurry are discharged into offshore waters. 40
41 22 the Sperry Sun crew could only measure returns sent to the mud pits and could not measure flow volumes sent overboard. 45 F.
The Blowout On April 20, 2010, at around 9:40 p.m., powerful pressures from the well caused mud to flow up from the well. Mud spilled on the rig floor as the well began to blowout. The crew responded to the situation by diverting the flow to the mud gas separator, part of the diverter system to which the crew...
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