METHOD AND APPARATUS FOR PERFORMING CEMENTING OPERATIONS

摘要

A remotely operated lifting top drive cement head (10) is provided having a high tensile strength, as well as the ability to swivel or rotate about a central vertical axis. The cement head permits selective launching of darts, setting plugs, balls or other objects which can be held in place within the cement head without being damaged or washed away by slurry flow, but which can be beneficially launched into said slurry flow at desired point(s) during the cementing process. The cement head can be remotely operated without requiring the lifting of personnel off the rig floor to actuate the tool or observe tool status.