One-piece ram element block for wireline blowout preventers

Details One-piece ram element block for wireline blowout preventers One-piece ram element block for wireline blowout preventers

E - Fixed Constructions

21

B

E21B 33/06 (2006.01)

Patent

CA 2328816

Ram seal units for attachment to the rams of blowout preventers incorporate an integral ram seal block having a central web, with a parallel rectangular elastomer support plates extending from opposite sides of the integral ram seal block. The central web is perforate to permit its interlocked relation with elastomer sealing material that is molded to ram seal block. The generally rectangular elastomer support plates define outer face surfaces that remain exposed after the molding operation has beta completed. These outer face surfaces of the elastomer support plates are adapted to be disposed is intimate face-to-face relation with internal wall surfaces of ram seal receptacles that are provided within BOP ram elements. Each of the rectangular elastomer support plates defines a pair of spaced retainer receptacles which receive a respective retainer element of a BOP ram to secure the ram seal unite in retained relation within one of the ram seal receptacles of a BOP ram element. When so supported, the elastomer sealing material located between the generally rectangular elastomer support plates and encapsulating the central web structure of each integral ram seal block, will be pry for sealing contact with its opposed counterpart of the opposed BOP ram element and with the wireline that is present within the body of the BOP unit.

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