New top drive casing running and drilling system removes personnel and equipment from the rig floor, gets through trouble zones and cuts time off casing jobs.Conventional casing jobs run up against two time-consuming issues: First, the hole must be cleaned (reamed and wiped) in order to obtain a good cement job. This costs rig time and exposes the well bore to damage. Second, lost circulation may cause the casing to become differentially stuck. In a survey of incidents in the Gulf of Mexico, these two problems accounted for 24% of...

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