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Unformatted text preview: than the five to seven bpm that Weatherford determined was necessary for float collar conversion. Because Bob Kaluza, the BP well site leader, was concerned about the low circulating pressure, he directed the rig crew to switch circulating pumps to determine whether doing so would improve circulating pressure. They eventually concluded that the pressure gauge they had been relying on was inaccurate. 118 Nathaniel Chaisson, an onsite Halliburton engineer, testified that, after circulation was established, Kaluza said “I’m afraid that we’ve blown something higher up in the casing joint.” Chaisson understood Kaluza to mean that he believed they had not been circulating mud from the bottom of the well up, but BP Daily Drilling reports 4/19, 4/10 (BP‐HZN‐MBI‐000136936; BP‐HZN‐MBI‐000136946). Cocales testimony at 71‐75. 117
118 51 rather were circulating it from some point higher in the well casing. 119 According to notes of Kaluza’s interview with BP internal investigators, Kaluza discussed with Guide and Keith Daigle, a BP well operations advisor, what K...
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