Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1981-09-21
1983-09-27
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277188A, 277 30, 277DIG6, F16J 1518
Patent
active
044064691
ABSTRACT:
A self-energizing seal system employing plastically deformable nonelastomeric elements to establish sealing integrity between concentric, relatively movable tubular conduits is disclosed. The primary sealing element comprises a chevron-shaped thermoplastic virgin polytetrafluoroethylene member. A plurality of back-to-back primary sealing elements are employed, thus creating a relatively frictionless interface along which radial expansion of the chevron-shaped members can occur. Annular back up members of polyphenylene sulfide and glass-filled polytetrafluoroethylene are used to inhibit axial extrusion of the chevron-shaped sealing members during radial expansion thus promoting sealing integrity.
REFERENCES:
patent: 2188957 (1940-02-01), Pfauser
patent: 3306620 (1967-02-01), Taschenberg
patent: 3351350 (1967-11-01), Shepler
patent: 3467394 (1969-09-01), Bryant
patent: 3627337 (1971-12-01), Pippert
patent: 4050701 (1977-09-01), Webb
patent: 4234197 (1980-11-01), Amancharla et al.
Burley, et al., "Recent Developments In Packer Seal Systems for Sour Oil and Gas Wells", (SPE Report #6762, 1977), 7 pp.
Baker International Corporation
Ward, Jr. Robert S.
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