Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate – Expandable detent engages plate to hold nipple
Patent
1987-09-04
1989-03-28
Arola, Dave W.
Pipe joints or couplings
Pipe to discreet nipple or sleeve to plate
Expandable detent engages plate to hold nipple
285338, 285351, 285915, 285917, 277235R, F16L 2104
Patent
active
048157708
ABSTRACT:
A packoff assembly for sealing an annulus between an inner tubular member and an outer tubular member including a sealing means rotatably connected to a packing nut. The sealing means includes an upper actuation ring rotatably retained on the packing nut. A sealing member having a ring-like metal body is rotatably mounted on the upper actuation ring with a roller ball connection which permits limited relative axial movement between the upper actuation ring and the sealing member. A lower actuation ring is rotatably mounted on the body of the sealing member by another roller ball connection which permits limited relative axial movement between the lower actuation ring and the body of the sealing member. The metal body of the sealing member includes a pair of frustoconical-shaped outer seal lips and a pair of frustoconical-shaped inner seal lips. An elastomeric seal ring is disposed on the body of the sealing member between each pair of metal seal lips. The upper seal lips of each pair flare upwardly, and the lower seal lips of each pair flare downwardly. The faces of the upper and lower actuation rings which oppose the respective faces of the adjacent metal seal lips are frustonconical in shape and are sloped in directions opposite to those of the seal lips. There is a void space between such faces of the actuation rings and their respective adjacent metal seal lips.
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Application S.N. 044,411, 4/30/87.
Application S.N. 044,416, 4/30/87.
Cyvas Matthew K.
Hyne Joseph H.
Long David D.
Arola Dave W.
Cameron Iron Works USA Inc.
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