Annular blowout preventer

Details Annular blowout preventer Annular blowout preventer

E - Fixed Constructions

21

B

166/50

E21B 33/06 (2006.01)

Patent

CA 1194787

Abstract of the Disclosure An annular blowout preventer having a body with a central bore, a piston chamber, and a packer chamber surrounding the central bore, a piston in the piston chamber, an annular packer in the packer chamber, the annular packer including a resilient annulus and a plurality of metal irising inserts embedded in the annulus and having upper triangular plates, lower triangular plates, a stem connecting the plates and means interconnecting adjoining plates to avoid inadvertent separation of one or more of said inserts, the annular packer moving between open and closed positions responsive to move- ment of the piston.

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