LATERAL SEAL FOR BLOWOUT PREVENTER SHEAR BLOCKS

摘要

Present embodiments of the disclosure are directed to a seal assembly for generating a seal between two opposing shear blades of a ram unit after shearing a tubular. The seal assembly may include at least a wiper, a sealing element, and an energizer. The wiper may clean a surface of a shear blade as the blade moves relative to the seal assembly. The sealing element may include an elastomeric material that can be deformed into engagement with the shear blade to generate the seal. The energizer may be a hard component that energizes the sealing element against the cleaned surface of the shear blade as the blade moves further relative to the seal assembly. The wiper may clean the sealing surface of the blade by removing debris from the surface prior to the energizer activating the seal, thus enabling a more secure seal to be established on the blade surface.

主权项

1. A blowout preventer, comprising:
a ram unit comprising a first shear blade and a second shear blade, wherein the ram unit is configured to force the first shear blade and the second shear blade together to shear and seal a wellbore tubular disposed within the ram unit, wherein the second shear blade comprises a seal assembly for sealing a space between the first shear blade and the second shear blade in response to the ram unit forcing the first shear blade and the second shear blade together, wherein the seal assembly comprises:
a wiper to clean a surface of the first shear blade;a sealing element to generate a seal between the surface of the first shear blade and the second shear blade; andan energizer to energize the sealing element against the surface of the first shear blade.