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Research highlights challenges in estimating Pmax in horizontal directional drilling, suggesting improved data collection.
A method for estimating the maximum allowable annular pressure (Pmax) in horizontal directional drilling (HDD) has been searched over the past 40 years. As a result, numerous analytical models of Pmax have been developed and are available in the literature. However, selecting an appropriate model of Pmax could be challenging as there are too many choices available. Although some relevant field/laboratory studies were conducted, the overall volume of data and level of detail of information currently available in the literature are not sufficient to perform a rigorous/comprehensive evaluation of the analytical models of Pmax. It is especially challenging with limited information to distinguish whether the error within the estimate of Pmax is due to model or parameter uncertainty. In this paper, the necessity of collecting geological information and drilling data from HDD projects is emphasized; furthermore, this paper proposes a research project that aims to address the challenges associated with Pmax.
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Park et al. (2025) studied this question.
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