Mud is simple! A little dirt-in-a-bag and slime-in-a-bucket, add water, and you have drilling mud. Of course, I have written this tongue in cheek! We have looked at drilling fluids from two points of view in this Water Well Journal column. We began by looking at the science of drilling fluids. This included defining the functions of a drilling fluid and the properties of the fluid that indicate the ability of the fluid to perform those functions. We also introduced several classes of drilling fluid additives, and when properly mixed, provide defined and measurable properties to control the subsurface geology that the bore path will intersect.
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