Pipes and tubular conduits – With closures and plugs – Inflation stem type
Patent
1994-03-15
1995-08-01
Bryant, III, James E.
Pipes and tubular conduits
With closures and plugs
Inflation stem type
138 96R, 166192, F16L 5510
Patent
active
054373093
ABSTRACT:
A locking cap for securing the open end of a well pipe to prevent contaminants from entering the well comprising a cap member adapted to be disposed over the open end of a well pipe casing to be locked, an outer flange downwardly extending from the cap member and integral therewith, the outer flange adapted to fit over the exterior surface of the well pipe casing to be locked, inner flange downwardly extending from the cap member and integral therewith, the inner flange adapted to fit about the interior surface of the well pipe casing to be locked, the inner flange including a series of parallel slots extending longitudinally inward from the end of the inner flange and towards the cap member to provide a series of radially expandable gripping fingers positioned along the perimeter of the well pipe casing interior surface, a cam disk positioned coaxially adjacent the inner flange, the cam disk being selectively movable against the fingers to radially expand each of the fingers into binding engagement against the interior surface of the well pipe thereby securing the cap member in place and an activating device for the cam disk to selectively urge the disk into and out of engagement with each of the fingers to radially expand the same.
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