Chudyk, Igor, Andriy Livinsky, Ахмед Танакчі, and Andriy Pastukh. “STUDY OF THE APPLICATION FEATURES OF ORIENTED BHAS WHILE DRILLING DIRECTIONAL WELLS”. Prospecting and Development of Oil and Gas Fields, no. 1(70) (March 29, 2019): 17-24. Accessed June 26, 2019. http://rrngr.nung.edu.ua/index.php/rrngr/article/view/683.