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    A BP cementing expert specifically advised one of the Macondo engineers in March that cementing the production casing using foamed cement would "present[] some significant stability challenges for foam. even though its plans had originally called for a greater number.

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    Casing & Drill Pipe Protector. The Casing & Drill Pipe Protector is a nonmetal abrasion-resistant sleeve installed on a drill pipe by a position collar.The protector O.D.is larger than that of a drill pipe collar.The protector prevents the metal to metal friction between casing and drill pipes,thus achieving the purpose of casing and drill pipe protection,Theprotector consists of two ...

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