ENBD, the proprietary Eni Managed Pressure Drilling with Uninterrupted Mud Circulation: Technical Update after the First Year’s Activity

MPD means an adaptive drilling process used to control precisely the annular pressure profile throughout the wellbore. The<br>objectives are to ascertain the downhole pressure environment limits and to manage the annular hydraulic pressure profile<br>accordingly. MPD is intended to avoid continuous influx of formation fluids to the surface. - Eni owns its own MPD, called<br>ENBD – Eni Near Balance Drilling.