Superabrasive cutters and drill bits so equipped
AssigneeBaker Hughes Incorporated
InventorsRedd H. Smith, Danny E. Scott, Craig H. Cooley, Marcus R. Skeem
Life of this patent
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Abstract
A cutter for a drill bit has a superabrasive member joined to a substrate at a three-dimensional interface. The three-dimensional interface comprises a protrusive pattern of interconnected elements comprising projections of the superabrasive member into the substrate and vice versa. The protrusive pattern comprises at least one generally annular member intersected by a series of generally radially extending members for distributing stresses along the interface, enhancing compressive strength, and enabling optimization of the magnitudes and locations of beneficial residual stresses in the superabrasive member and in the vicinity of the substrate.
Claims24
A cutter for use in forming a bore hole in a subterranean formation, comprising:
- a substrate;
- a layer of superabrasive material having a cutting surface and secured over an end of the substrate;
- and
- an interface between the substrate and the layer of superabrasive material, the interface including a protrusive portion comprising at least one protrusive, generally annular member, at least three protrusive, generally radially extending members each intersecting the at least one generally annular member at a radially inner extent thereof and extending to an outer periphery of the at least one cutter at a radially outer extent thereof.
A drill bit for use in forming a bore hole in a subterranean formation, comprising:
- a bit body carrying a plurality of cutters, at least one cutter of the plurality comprising:
- a substrate;
- a layer of superabrasive material having a cutting surface and secured over an end of the substrate;
- and
- an interface between the substrate and the layer of superabrasive material, the interface including a protrusive portion comprising at least one protrusive, generally annular member, at least three protrusive, generally radially extending members each intersecting the at least one generally annular member at a radially inner extent thereof and extending to an outer periphery of the at least one cutter at a radially outer extent thereof.
Dependencies are inferred from the claim text.