A compilation of literature dealing with drilling and completing through salt formations is examined and summarized. This literature is adapted to the special conditions present in the Williston Basin, especially in the Madison Group.

Discussion includes drilling in-gauge hole through the Charles and the Spearfish and getting adequate mud removal throughout the hole. Mechanical means of insuring cement bond to the pipe and to the formation are discussed as is the failure mode of cement in salt. A cement and casing design is proposed which keep the hydrostatic head on the Mission Canyon within tolerable limits while still providing for a strong cement.

The suggestion is made that a major contributor to early casing failure in salt formations is pipe set in compression loading. This hypothesis is discussed at length. A method for ensuring tension loading through the Charles and Spearfish is presented.

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