Donald U. Shaffer - Anaheim CA Gary M. Oulrey - Arroyo Grande CA
International Classification:
E21B 3306
US Classification:
166387
Abstract:
A rotary blowout preventer having a radially compressible packing to be sealingly engaged with and rotated by a drill pipe or kelly and a hydraulically actuated wedging piston for compressing the packing is provided with a rotatable bearing support which in an exemplary embodiment includes an inverted truncated cone interposed between the packing and the piston, which is rotatably mounted to the piston by a plurality of bearing races, along with a thrust bearing interposed between the packing and the housing enable the packing to rotate relative to the housing and prevents upward axial motion of the packing.
Name / Title
Company / Classification
Phones & Addresses
Gary Oulrey Owner
Wild Life Arts Amusement/Recreation Services Repair Services