Wells – With below and above ground modification – Head for tool – piston or cleaner
Patent
1986-08-06
1988-02-02
Novosad, Stephen J.
Wells
With below and above ground modification
Head for tool, piston or cleaner
166285, E21B 3305
Patent
active
047223898
ABSTRACT:
For use with a top drive power unit supported for connection with a well string in a well bore to selectively impart longitudinal and/or rotational movement to the well string, a feeder for supplying a pumpable substance such as cement and the like from an external supply source to the interior of the well string in the well bore without first discharging it through the top drive power unit including a tubular member or mandrel extending through an outer housing which is sealably and rotatably supported thereon for relative rotation between the outer housing and the tubular member. The mandrel and outer housing have flow passages for communicating the pumpable substance from an external source to discharge through the outer housing and mandrel into the interior of the well string below the top drive power unit. The mandrel includes an arrangement to releasably position a pump down plug for discharge into the well string and for positioning a barrier to selectively dislodge the barrier into the well string through the mandrel.
REFERENCES:
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International Publication No. WO 80/02717, (Inventor: Wallgren, Alf; International Application No. PCT/SF 80/00158; International filing date 30 May 1980).
Composite Catalog of Oil Field Equipment & Services, Bower, p. 730, vol. 1, 1962-63.
Bagnell David J.
Hayden Jack W.
Novosad Stephen J.
Texas Iron Works, Inc.
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