E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/50
E21B 33/06 (2006.01)
Patent
CA 1203160
Abstract of the Disclosure A ram-type blowout preventer including a body with a central bore and guideways extending outward therefrom, a ram in each guideway with means for moving it inward and outward and means for compensating for wear of the guideway or ram including at least one skid secured to the lower surface of the ram.
437325
Cameron Iron Works Inc.
Smart & Biggar
LandOfFree
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