TOP DRIVE CEMENTING MANIFOLD

摘要

A top drive cementing manifold which can be maintained stationary as the drill string is rotated by a top drive assembly. The manifold facilitates the pumping of a cement slurry into the well and the subsequent delivery of a cementing plug. The manifold is mounted to the well string by a pair of swivel joints which allow the continuous introduction of well fluids but allows the manifold to be held stationary as the well string is rotated, A series of valves in the manifold and string direct the well fluids through the desired path. Each of the swivels incorporate bearings and seals to facilitate rotation yet maintain proper fluid flow.