Shear blade and method of attachment to shear rams

摘要

A shear blade attached to a ram block. At least one bolt passage is formed at an angle at the top of the ram block. A bolt passage is formed in the shear blade that corresponds with the bolt passage on the tam block. A bolt introduced into the bolt passage of the ram block and also the bolt passage in the shear blade attaches the shear blade to the ram block. By using this technique for attaching the shear blade to the ram block, surface area of a front face of the shear blade is not further reduced. Therefore, the strength of the shear blade is increased.

主权项

1. An apparatus for shearing pipe within a blowout preventer (BOP), comprising:
a shear ram block having a forward end and a longitudinal axis; a blade having a forward face; a rearward face opposite of the forward face, the rearward face in abutment with the forward end of the shear ram block; a plurality of face bolt passages extending through the blade and into the forward end of the shear ram block; a face bolt located in each face bolt passages and securing the blade to the shear ram block; at least one inclined bolt passage extending from an upper surface of the shear ram block downward and inward, out the forward end of the shear ram block and into the blade; and an inclined bolt located in the inclined bolt passage to secure the blade to the shear ram block.