Swivel cementing head with manifold assembly having remote control valves and plug release plungers

Abstract

No swivel head with manifold assembly having remote control valves and plug release plungers. The assembly comprises a body connectable to a tool string, and a cementing manifold connectable to the cement source. The cementing manifold has remotely controllable cement control valves incorporated therein. The manifold is rotatably mounted on the body to provide continuous fluid communication between the manifold and body even when the body is rotating with respect to the manifold. The rotatable mounting is provided by a swivel connection comprising a mandrel extending from the body and a sleeve connected to the manifold. The swivel connection also provides continuous communication between a pressure line, extending from the sleeve to a pressure supply, and another pressure line, extending from the mandrel to a dart or ball releasing mechanism. This allows the releasing mechanism to be actuated even when the body is rotating with respect to the manifold and when the entire apparatus is being reciprocated. Preferably, another swivel connection is used which also provides continuous fluid communication between the manifold and body. A plug release indicator is also provided in one preferred embodiment.

Dependencies are inferred from the claim text.