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TECHNICAL REVIEW Classification of unstable formations and related mud technology Xu Tong-Tai, Exploration bureau of CNPC Wellbore instability is a common problem encountered in drilling operation. It can affect the drilling
TECHNICAL REVIEW Classification of unstable formations and related mud technology Xu Tong-Tai, Exploration bureau of CNPC Wellbore instability is a common problem encountered in drilling operation. It can affect the drilling