Industry leaders shed light on drilling riser gas effects

This article on gas-bubble behavior in deepwater drilling risers provides some of the first published results concerning the dispersive behavior of gas in water-base mud.Field tests conducted by three major operators show that gas-bubble formation in deepwater drilling risers, filled with water-base mud, is governed through dispersion rather than slug-type behavior patterns.The dynamic effects of gas-bubble formation within marine risers pose major potential problems for offshore drilling operations in regards to well-control procedures and conditions that may possibly lead to collapsed risers.To investigate the problem, Shell Offshore Inc., with participation by former Amoco Corp. (now p...

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