Critical Mud Weight—1: Analytical method predicts critical mud weight in horizontal wells

Determining the critical or optimum mud weight is not an easy task, especially when drilling horizontal wells.Drilling mud weight is an important factor in drilling, demanding significant attention because most of the problems encountered during rotary drilling are either directly or indirectly related to drilling mud.For horizontal wells, the situation becomes more complex and requires a detailed analysis of the conditions under which different forms of failure will occur due to lack of adequate drilling mud weight.This first article reviews the fundamentals of the function of drilling mud in drilling horizontal wells. It proposes simplified analytical methods for predicting the critical...

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