Wells – Above ground apparatus – Well caps or casing heads
Patent
1998-08-24
2000-08-22
Suchfield, George
Wells
Above ground apparatus
Well caps or casing heads
E21B 3303
Patent
active
061056693
ABSTRACT:
A device for closing an end of a well casing includes a gasket, a base and a cap. The gasket has an inner diameter that fits around the well casing. The base has an upwardly facing groove for receiving a lower portion of the gasket, a circular opening slightly larger than the exterior diameter of the well casing thereby permitting the base to be positioned about the well casing, and a plurality of lugs positioned about the periphery of the base. The base also includes an annular flange that projects downward from the lower surface of the base, the annular flange has an inwardly facing surface extending axially downward from the groove in the base. The groove in the base has an inwardly facing wall parallel with the flange inner surface and an upwardly facing shoulder perpendicular to the flange inwardly facing wall that connects the flange inwardly facing wall with the groove annular surface. The base has an upwardly facing surface adjoining the groove annular surface. The cap has a downward facing groove for receiving an upper portion of the gasket. The cap includes a plurality of lugs positioned about the outer periphery of the cap, an inwardly facing annular surface parallel with the inwardly facing surface of the flange, and an axially downward facing shoulder surface perpendicular to the inwardly facing annular surface. The lugs of the base and cap are adapted for axial alignment with axial apertures formed in the lugs. Fastener means within the apertures urge the cap and the base towards one another thereby compressing the gasket between the shoulder surfaces and providing a seal about the well casing.
REFERENCES:
patent: 3035732 (1962-05-01), Baker
patent: 3504742 (1970-04-01), Crawford
patent: 3924686 (1975-12-01), Arnold
patent: 4023699 (1977-05-01), Lien
patent: 4411312 (1983-10-01), English
patent: 4457448 (1984-07-01), Beagell
patent: 4483395 (1984-11-01), Kramer et al.
patent: 4564041 (1986-01-01), Kramer
patent: 4702274 (1987-10-01), Kramer
patent: 4842060 (1989-06-01), Paulus
patent: 4848458 (1989-07-01), Holdsworth et al.
patent: 4865138 (1989-09-01), Swietlik
patent: 4866903 (1989-09-01), Ferstay
patent: 4867871 (1989-09-01), Bowne
patent: 4886426 (1989-12-01), Surinak
patent: 4928731 (1990-05-01), Koller
patent: 4981170 (1991-01-01), Dierbeck
patent: 5211229 (1993-05-01), Pecue, II
patent: 5372192 (1994-12-01), Bitting
patent: 5377752 (1995-01-01), Farrara
patent: 5390966 (1995-02-01), Cox et al.
patent: 5507628 (1996-04-01), Masse et al.
patent: 5529462 (1996-06-01), Hawes
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