Theholediameterwaslessthanthreeinchesgreaterthanthecas

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Unformatted text preview: estimated 72 to 88 bbls of fluids could have been lost during the production casing cement job. This possible range of loss exceeded the entire volume of cement pumped during the production casing cement job. This could indicate that over‐ displacement of cement occurred in the shoe track. In other words, the cement could have been pumped into the well, past the shoe track, which would have left spacer and no cement in the shoe track to isolate the center of the production casing. If over‐displacement occurred, it would have resulted in insufficient cement coverage in the shoe track. Id. at 100‐101. 141 56 Figure 5 ‐ Flow‐out vs. Flow‐in on the Production Casing Cement Job (Calculated by Panel) G. Industry Standards for Cementing API RP 65 contains recommended practices focused on the drilling and cementing of casings in the shallow sediments of deepwater wells in which highly permeable and over‐pressured sands are found. 142 In connection with the production casing cement job on the Macondo well, BP diverged from a number of API RP 65 recommended practices. API RP 65 Section 7.5 provides the following guidance on preventing cement from being displaced by drilling mud: If casing is not to be run to bottom, the “rat hole” should...
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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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