Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1981-04-29
1982-09-14
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 30, 166120, 166187, E16J 1546, E21B 33127
Patent
active
043492045
ABSTRACT:
An extrusion resistant expansible element for use as a sealing element or packer in a subterranean well bore. The expansible element comprises an inner elastomeric sleeve to which fluid pressure is internally applied to produce the expansion forces. The internal sleeve is surrounded by an annular array of elongated reinforcing slats formed of a relatively rigid, yet deformable material such as metal or a plastic filled with reinforcing material such as fiber glass. The medial portion of the reinforcing slats is surrounded by an outer elastomeric sleeve which effects the primary seal with the well bore when the internal elastomeric sleeve is expanded through the application of fluid pressure. Those portions of the reinforcing slats adjacent to each end of the outer elastomeric sleeve are deformed into frictional abutting engagement with the well bore, thus providing securement against any axial displacement or extrusion of the outer elastomeric sleeve due to cold flow under the long applied pressure, or excessive fluid pressure or temperatures encountered in the well bore. In a modification, the elongated reinforcing slats are individually coated with an elastomeric material to improve the sealing of these elements against each other.
REFERENCES:
patent: 1549168 (1925-08-01), Townsend
patent: 2196668 (1940-04-01), Ragan
patent: 2643722 (1953-06-01), Lynes et al.
patent: 3581816 (1971-06-01), Malone
patent: 3604732 (1971-09-01), Malone
patent: 3606924 (1971-09-01), Malone
Lynes, Inc.
Norvell, Jr. William C.
Ward, Jr. Robert S.
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