BOP seal with improved metal inserts

Details BOP seal with improved metal inserts BOP seal with improved metal inserts

1990-08-16

1991-04-30

Fox, John C.

Valves and valve actuation

Blow-out preventers

251 13, 277178, E21B 3306

Patent

active

050111108

ABSTRACT:
A blowout preventer is provided with an improved sealing assembly for sealing engagement with a pipe extending through the blowout preventer into a well bore. The sealing assembly includes an elastomeric seal and a plurality of circumferentially spaced metal inserts within the seal for substantially minimizing or preventing extrusion of the seal under high fluid pressure. The BOP be reliably used for sealing engagement with pipes of varying diameters. Each insert has a substantially I-shaped configuration with an upper flange, a lower flange, and a rib fixedly interconnecting the flanges. A slot is provided within at least one of the flanges and forms a cavity for receiving a male interconnecting member extending circumferentially from an adjacent one of the inserts, such that the circumferentially spaced inserts are interconnected to minimize extrusion gaps between the inserts and to better enable the sealing assembly to form a positive seal with the pipe.

REFERENCES:
patent: 3915424 (1975-10-01), Le Raiax
patent: 4930745 (1990-06-01), Granger et al.

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