CLOSED-LOOP CIRCULATING-2: Manual pressure management enhances safety, efficiency

David PavelBrian GraysonWeatherford International Ltd.HoustonManual pressure management in a closed-loop mud circulating system enhances safety and efficiency of drilling and completion operations.This is the second of a four-part series of articles on the benefits of closed-loop circulating systems. The previous article (OGJ, Dec. 6, 2010, p. 84) discussed the system fundamentals, the data acquired with a closed-loop system, and how the system helps in early kick and loss detection during conventional drilling operations.The two remaining parts will cover automatic control for managing the mass flow balance across the entire wellbore and ways in which companies use closed-loop pressure d...

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