To plan the cementing operations in a deep, high temperature well drilled in the Rocky Mountains, accurate circulating temperatures were required. Temperature measurements made while drilling were used to validate a computer predicted drilling temperature profile. Given the hole geometry, the geometry of the string to be cemented, the planned cementing fluids, and the planned pumping rates the computer model was used to predict the circulating temperatures while cementing. These predicted temperatures were then used to optimize the cement slurry design.

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