Ram bore profile for variable bore packer ram in a ram type blowout preventer

A variable bore ram packer assembly used in a ram blowout preventer for oil and gas drilling operations, comprising:

• a ram body;
• said ram body having a front face, said front face having a ram bore profile positioned therein;
• said ram bore profile substantially U shaped to support a shouldered tubular member within a specified diameter range;
• a plurality of side packers and a top seal positioned on said ram body to seal said ram body within a ram blowout preventer;
• said ram body includes a lower body and an upper body, said lower body and said upper body define a ram packer cavity therebetween;
• said substantially U shaped ram bore profile in said ram body includes a rear portion substantially formed as an arcuate segment, a pair of diverging sides extending from said rear portion of said ram bore profile toward said front face of said ram body at an oblique angle, and;
• said pair of diverging sides of said ram bore profile connected by arcuate sections to a front throat of said ram bore profile, said front throat having parallel sides that are substantially perpendicular to said front face of said ram body.

A ram blowout preventer for oil and gas drilling operations including a pair of variable bore rams, comprising:

• a body with a vertical bore;
• a pair of opposing bonnet assemblies laterally disposed in said body;
• a pair of opposing variable bore rams laterally moveable within said bonnet assemblies;
• each of said opposing variable bore rams including a ram body;
• each of said ram bodies having a front face, said front face having a ram bore profile positioned therein;
• said ram bore profile substantially U shaped to support a shouldered tubular member within a specified diameter range;
• a plurality of side packers and a top seal positioned on each of said ram bodies to seal said ram body within said ram blowout preventer;
• said ram body includes a lower body and an upper body, said lower body and said upper body define a ram packer cavity therebetween;
• said substantially U shaped ram bore profile in said ram body includes a rear portion substantially formed as an arcuate segment, a pair of diverging sides extending from said rear portion of said ram bore profile toward said front face of said ram body at an oblique angle, and;
• said pair of diverging sides of said ram bore profile connected by arcuate sections to a front throat of said ram bore profile, said front throat having parallel sides that are substantially perpendicular to said front face of said ram body.