Blowout preventer with shearing blades

摘要: The disclosure provides a blowout preventer (BOP) system with ram having shear blade profile to tubular member disposed in the BOP. can include stress concentrator and centering shaped surface. surface be laterally offset from centerline of travel on opposite sides centerline. An opposing second have mirror image reversed orientation first blade. Further, mandrel for deform around during shearing process reduce an overall lateral width sheared BOP through-bore allow retrieval deformed