초록 ▼

A variable bore ram packer designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The variable bore ram packer is molded of an elastomeric material having a central semi-circular opening sized to fit closely about a tubular member. The packer

A variable bore ram packer designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The variable bore ram packer is molded of an elastomeric material having a central semi-circular opening sized to fit closely about a tubular member. The packer member includes a plurality of pillar inserts molded within the elastomeric material around the central semi-circular opening. The packer member and the plurality of pillar inserts are molded into a unitary structure allowing the plurality of pillar inserts to move and seat against different diameter tubular members to prevent extrusion of the elastomeric material between the pillar inserts and the tubular member. The pillar inserts include a top plate, a bottom plate and a spacer pin positioned therebetween. The top and bottom plates are a substantially triangular shape and in the preferred embodiment are free to rotate relative to the spacer pin independently of one another. The independent movement of the top and bottom plates allows the top and bottom plates to move and seat against different diameters.

대표청구항 ▼

1. A variable bore packer used in a ram-type blowout preventer for oil and gas drilling operations, comprising:a packer member molded of elastomeric material having a central semi-circular opening sized to fit closely about a tubular member; a plurality of pillar inserts molded within said elastomer

1. A variable bore packer used in a ram-type blowout preventer for oil and gas drilling operations, comprising:a packer member molded of elastomeric material having a central semi-circular opening sized to fit closely about a tubular member; a plurality of pillar inserts molded within said elastomeric material around said central semi-circular opening; said packer member and said plurality of pillar inserts being molded into a unitary structure allowing said plurality of pillar inserts to move and seat against different diameter tubular members to prevent extrusion of said elastomeric material between said pillar inserts and the tubular member; said unitary structure is molded to form a pair of side packers integral with said packer member; said pillar inserts include a top plate, a bottom plate and a spacer pin positioned therebetween; and, said spacer pin allows independent rotational movement between said spacer pin and at least one of said top plate and said bottom plate.