Keying means for segmented end ring blowout preventer

Details Keying means for segmented end ring blowout preventer Keying means for segmented end ring blowout preventer

1981-07-20

1982-11-09

Spiegel, H. Jay

Valves and valve actuation

Blow-out preventers

251 5, 277185, 277188A, 277235R, E21B 3306

Patent

active

043580858

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 expansion during radial compression of the packing has keying means cooperating with the rigid end ring segments of the packing and the conical bores for guiding a sector-wise movement of the segments in individually separate and predetermined 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.

REFERENCES:
patent: 2945665 (1960-07-01), Regan et al.
patent: 3100015 (1963-08-01), Regan
patent: 3486759 (1969-12-01), Lewis
patent: 3492007 (1970-01-01), Jones
patent: 3561723 (1971-02-01), Cugini
patent: 3614111 (1971-10-01), Regan
patent: 3737139 (1973-06-01), Watts
patent: 3897038 (1975-07-01), Le Rouax
patent: 3897071 (1975-07-01), Le Rouax
patent: 4098516 (1978-07-01), Murman
patent: 4099699 (1978-07-01), Allen
patent: 4345735 (1982-08-01), Regan et al.
Regan, U.S. patent application Ser. No. 160,787, filed Jun. 18, 1980.

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