Perpustakaan Digital ITB

Hole cleaning is a critical aspect of drilling operations, involving the removal of drill cuttings from the well bore to ensure stability and prevent issues such as stuck pipes or reduced drilling efficiency. The effectiveness ofhole cleaning is influenced by various factors, including drilling fluid flow rate, annular velocity, and wellbore geometry. This study examines the role of the Intelligent Circulating Sub (ICS), a key component of the Bottom Hole Assembly (BHA), in enhancing hole cleaning efficiency. Unlike conventional circulating subs that rely on drop ball systems, the ICS offers advanced control through pressure or RPM activation, allowing for more precise management of flow rates and circulating paths. By analyzing changes in Equivalent Circulating Density (ECD) and annular velocity with ICS, this research aims to highlight the advantages of ICS over conventional methods in improving drilling performance and maintaining wellbore stability.