Optimising deepwater drilling safety and efficiency in Australia with closed-loop circulation drilling systems
Closed-loop circulation drilling (CLCD) systems provide an increasingly viable alternative to open-to-the-atmosphere conventional drilling systems by emphasising the use of closed and pressurisable systems to allow a scalable approach that produces a range of benefits. These range from increased personnel and environmental safety to better data resolution and even greater control over the drilling process. This paper states how CLCD addresses a need in a post-Macondo world, where deepwater drilling is under intense and increased regulatory control, by providing flexible systems that supplement the safety and efficiency of deepwater drilling operations. Furthermore, it describes the details of how CLCD systems can be installed and used on moored and dynamically positioned drilling vessels, and points out how it may be deployed for deepwater conditions in Australia. Recent successes and issues encountered in the application of this technology in the Asia Pacific region are also shared.