Annular blowout preventer

Details Annular blowout preventer Annular blowout preventer

E - Fixed Constructions

21

B

166/50

E21B 33/06 (2006.01)

Patent

CA 1073810

ANNULAR BLOWOUT PREVENTER Abstract of the Disclosure There is disclosed an annular blowout preventer having a packer which is surrounded by an annulus of resilient material, and an operating system which in- cludes means for longitudinally compressing the outer annulus in order to constrict its inner circumference and thereby move the packer from an expanded position, in which it opens the bore through a housing in which the packer and outer annulus are received, to a con- stricted position in which it closes the bore by sealing about a pipe in the bore or upon itself.

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