SPECIAL REPORT: Deepwater fluid displacement needs special approaches

Techniques that consider all the chemical and mechanical aspects of displacing drilling fluid can benefit dramatically the economics and effectiveness of well completions in deep water. Three critical components to consider include spacer design, wellbore cleanup efficiency, and fluid selection.With day rates for deepwater rigs at unprecedented high levels, the time saved during fluid displacement can reduce overall project cost. A correctly engineered and executed displacement operation avoids having to repeat the process to rectify chemical and mechanical problems that may occur during improperly designed transitions. Correct procedures are important especially in openhole completions.L...

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