Herianto. “Optimization Rate Of Penetration In Directional Drilling With Adjustable Bit Rotating and Hydraulic Hole Cleaning”. European Journal of Applied Sciences 9, no. 5 (November 7, 2021): 411–425. Accessed April 26, 2024. https://journals.scholarpublishing.org/index.php/AIVP/article/view/11097.