E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/50
E21B 33/06 (2006.01) F16J 15/46 (2006.01)
Patent
CA 1169763
47-273/REG AN?. 12 KEYING MEANS FOR SEGMENTED END RING BLOWOUT PREVENTER ABSTRACT: An improvement in blowout preventer apparatus of the type having a radially compressible annular packing mounted within a housing chamber, the housing having axially aligned upper and lower conical bores communicating with an inner bore of the annular packing, the packing axially expanding towards said upper and lower bores upon said radial compression, a plurality of rigid end ring segments attached to sectored webs of the ends of the packing and thereby individually movable axially outwardly and radially inwardly relative to the upper and lower conical bores to control the packing axial exoansion during radia1 compression of the packing has keying means cooperating with the rigid end ring segments of the packing an1 the conical bores for guiding a sector-wise movement of the segments in individually separate and pregetermined paths along the conical bores to a common radial position independent of the uniformity of the packing radial compression and/or axial expansion. Exemplary keying means include a key member provided in a slot in the packing end ring segment and a mating keyway in the conical bore.
398505
Regan John
Watkins Bruce J.
Gowling Lafleur Henderson Llp
Hughes Tool Company
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