Loss Circulation in Drilling: Causes, Challenges, and Effective Solutions
Loss circulation in drilling is one of the most common and costly problems encountered during oil, gas, geothermal, and water well drilling operations. It occurs when drilling fluids (mud) unintentionally flow into the formation instead of returning to the surface through the annulus. If not addressed promptly, loss circulation in drilling can lead to increased non-productive time (NPT), higher operational costs, formation damage, and even well control issues. Understanding its causes, types, and mitigation strategies is essential for efficient and safe drilling operations. What Is Loss Circulation in Drilling? Loss circulation in drilling refers to the partial or complete loss of drilling fluid into subsurface formations. Drilling fluid plays a vital role in carrying cuttings to the surface, cooling and lubricating the drill bit, maintaining wellbore stability, and controlling formation pressures. When circulation is lost, these critical functions are compromised, increasing th...