Abstract

This paper presents the development, qualification, and first use of ECD-Management (ECD-M); a new managed pressure drilling system developed to solve major challenges when drilling in deep waters. ECD-M combines EC-Drill from Enhanced Drilling (EDR), a Controlled Mud Level technology where a subsea pump module is installed mid riser, with the Delta Seal Riser Module (DSRM) from Managed Pressure Operations (MPO) having a Quick Closing Annular (QCA) installed just above the subsea pump. This enables extending the operating envelope of the technology to a point where loss of circulating capability could otherwise cause an underbalance in the well. The first ECD-M well was partially drilled with a reduced riser level, but without the Delta Seal Riser Module. The paper describes the rig modifications, interfaces between vendors, rig contractor and service companies, training, process with BSEE, qualification, success criteria and finally the results and experiences from first use.

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