Lifting top drive remote control cement head
OwnerNorman B. Giebeler, James F. Giebelerinventors
Life of this patent
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Abstract
A lifting top drive sub sea staging cement head in which cement slurry flows from outside into its central bore, thru a rotating swivel connection. The cement head has a rotatably indexable reservoir cylinder with multiple cells which may be loaded with balls, and/or darts, and/or staging bombs. One first cell is kept open for circulation. The cylinder is rotatably aligned, at will to the flow path, so that the staging elements may be washed down the drill string. In addition, the cement head is hydraulically remotely controlled such that no operators protrude from the smooth body, yet the remote system may be manually over-ridden.
Claims12
A cement head for lifting a sub sea drill string comprising:
- an upper body having a bore for fluid flow extending to a sure lock connection, with an external swivel having connections for fluid flow into a central bore, and a second swivel for control hydraulics;
- a cylinder rotatably mounted within a cement head body with multiple cells for balls, darts, and/or staging bombs;
- and
- a lower body having a through bore for fluid flow to the drill string, the cement head body holding said cylinder and an indexing and locking mechanism, connected by sure lock to the upper body.
A flow through cement head with a coaxial multi celled cylinder rotatably mounted between upper and lower flow diverters which allow a cement slurry flow from down through a central bore to connect with a radially offset cell bore in the cylinder and then return likewise back to the central bore.
A flow through cement head with a flexible hose internally connecting offset bores, wherein said hose is externally pressure compensated by a liquid jell, preventing its entrapment by leaking cement slurry.
A remote control wash down flow through lifting cement head fully contained within a cement head body diameter, wherein the cement head contains an indexable multi celled reservoir cylinder for balls and/or darts and/or staging bombs.
A flow through cement head having an offset flow path to a coaxial revolving reservoir cylinder for staging elements and an offset flow path to a bottom sub connection.
A cement head containing a multi celled plug reservoir cylinder which is rotatably mounted off center such that one cell is coaxial to the bore of a lower sub.
Dependencies are inferred from the claim text.