As operators around the world continue to explore coiled tubing drilling and completions, one of the main benefits this technology has demonstrated is the ability to drill through the formation in an underbalanced situation. The benefit is somewhat minimized, however, if the well has to be loaded with kill weight fluid prior to running the completion or perforating. This paper will discuss how this problem was solved for one North Sea operator and how that solution can be extended to other operators.

Keywords:
safety valve, society of petroleum engineers, dsv, underbalanced drilling, downhole swab valve aid, control line, annular pressure drilling, deployment, operator, mark hopmann
Subjects:
Pressure Management, Underbalanced drilling, Perforating, Completion Selection and Design, Completion Installation and Operations, Well Intervention, Completion equipment, Coiled tubing operations, Completion Operations
Copyright 1995, Society of Petroleum Engineers
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