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Unformatted text preview: ping production casing cement into the well. Based on information that Weatherford supplied, the float collar conversion should have occurred with a differential pressure of between 400 and 700 pounds per square inch (psi), which required a calculated pump rate of five to seven barrels per minute (bpm). A successful conversion of the float collar would result in the float collar’s two check valves moving into a closed position, which should prevent flow of cement (or other fluids) up the casing. The crew made nine attempts to establish circulation through the float collar in an effort to convert the float collar, increasing pressure on each attempt. The crew finally established circulation on the ninth try, at pressure of 3,142 psi. After circulation was established, the circulation pressure was only 340 psi, which was lower than the pressure of 570 psi predicted by Halliburton’s computer model. The pump rate required to move mud into the well and through the shoe track (circulating pressure) never exceeded approximately 4 bpm, which was less...
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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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