<p>A pair of shear blades and a blowout preventer having the pair of shear blades. The shear blades are configured to cut a tubular inside the blowout preventer. The shear blades have different geometries of the front cutting surfaces. One geometry promotes a secure positioning of the tubular relative to the first blade while the second geometry promotes a puncturing of the tubular by the second blade.Figure 4A</p>
申请公布号
SG182939(A1)
申请公布日期
2012.08.30
申请号
SG20120005278
申请日期
2012.01.25
申请人
HYDRIL USA MANUFACTURING LLC
发明人
HALL, CHRISTOPHER ANDREW;YADAV, SEEMANT;JUDGE, ROBERT ARNOLD