The well construction in mature fields with standard drillpipe sometimes requires extra casing strings to avoid well stability problems caused by depleted formation pressures. Because they improve wellbore stability, the DCwD techniques developed through close collaboration between Schlumberger and Tesco under the sponsorship of ConocoPhillips may reduce the number of casing strings needed.The paper proposed a solution method for this problem.
DATE: 17/may/2010
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