Document Type and Number:
Japanese Patent JPS6311517
Kind Code:
B2
Abstract:
Rams are provided in a blowout preventer to shear the drill string and seal the well bore should the need arise. Two shearing rams have cutting blades which shear the drill pipe. A seal member is mounted behind one of the cutting blades and is adapted to move into sealing position after shearing has occurred. Elastsomer flow into areas where there has been damage to the seal member is permitted by the design of the seal member.
Inventors:
JEEMUZU ETSUCHI HORUTO JUNIA
MORISU NYUUMAN
MORISU NYUUMAN
Application Number:
JP5703780A
Publication Date:
March 14, 1988
Filing Date:
April 28, 1980
Export Citation:
Assignee:
HYDRIL CO
International Classes:
B26D3/16; B23D21/00; E21B29/08; E21B33/06