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Unformatted text preview: rwarded Kaluza’s description of the so‐called bladder effect to O’Bryan, who responded as follows: 239 Ezell testimony at 282. Testimony of Chris Pleasant, Joint Investigation Hearing, May 28, 2010, at 118. 238 BP‐HZN‐MBI00262896. 239 Id. 236
237 95 Around 8:52 p.m. on April 20, about an hour after the second negative test, Donald Vidrine (who was on the rig) called Mark Hafle (who was at BP’s Houston offices) to talk about whether to test the surface plug using a pressure test or a weight test. During the conversation, Vidrine also talked to Hafle about the negative tests that the rig crew had just conducted. Vidrine told Hafle that the crew observed zero pressure on the kill line, but there was pressure on the drill pipe. Hafle responded that a successful negative test could not result in pressure on the drill pipe and zero pressure on the kill line. He told Vidrine to consider whether pressure was trapped in the line or perhaps a valve was not properly lined up. Vidrine reported to Hafle that he was fully...
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