Patent ID: 6253643
Filing Date: 2001-07-03
Classification: E21B

Abstract:
A jaw assembly for gripping tubular members, comprising:a. a jaw member, attachable to a gripping mechanism, said jaw member having:i. a concave surface provided with a plurality of parallel splines radially spaced over said concave surface, forming parallel grooves between said splines, each said spline extending outward substantially perpendicular from said concave surface; andii. a jaw keyway formed on said concave surface and intersecting said splines;b. a die member removably insertable within said jaw member, said die member having:i. a convex surface provided with a plurality of parallel splines radially spaced over said convex surface, forming parallel grooves between said splines, said splines on said die member being positioned to engage said parallel grooves on said jaw member;ii. a gripping surface formed on a side opposite said convex surface, said gripping surface including a plurality of raised teeth, said teeth having peaks and forming intersecting depressions between said peaks; andc. a key sized to engage said jaw keyway when said die member is inserted within said jaw member.