CASING MAKE-UP AND RUNNING TOOL ADAPTED FOR FLUID AND CEMENTCONTROL

摘要

The apparatus of the present invention provides a top drive (3)- supporte d tool for making up and running casing strings into a borehole. The tool co mprises a fill-up and circulation assembly and a launcher assembly (6) that is adapted to cooperate with a connectable cement wiper plug assembly for la unching wiper plugs (52, 54) that control cement placement in the annulus be tween a casing string and a borehole containing the casing string. The tool of the present invention shortens or eliminates delays in well operations, t hereby improving integrity of cement liners formed by placing cement slurry in a targeted interval.