ORUKPE NO. A Closed-Form Expression for the Maximum Inclination Angle of Build-and-Hold Directional Well Trajectories: A Unified Formulation Valid for Both r1 > X3 and X3 > r1. Direct Res. J. Eng. Inform. Tech. [Internet]. 2026 Oct. 20 [cited 2026 Oct. 30];14(3):113-21. Available from: https://journals.directresearchpublisher.org/index.php/drjeit/article/view/919