THE FORCES GENERATED WHEN DRILLING BITS ARE APPLIED VERTICALLY AND OBLIQUELY: ANALYTICAL ANALYSIS AND INFLUENCE ON NORMAL OPERATION AT ANGLES OF 15° AND 30° INCLINATION. (2026). Eureka Journal of Geoscience, Materials & Resource Engineering, 2(4), 74-89. https://eurekaoa.com/index.php/9/article/view/918