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US 8,136,887 B2Granted
Non-rotating pick with a pressed in carbide segment
AssigneeSchlumberger Technology Corporation
InventorsDavid R. Hall, Ronald B. Crockett, John Bailey, Jeff Jepson
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Abstract
In one aspect of the present invention, a high impact resistant tool has a superhard material bonded to a cemented metal carbide substrate at a non-planar interface. The cemented metal carbide substrate is bonded to a front end of a cemented metal carbide segment. A stem formed in the base end of the carbide segment opposite the front end is press fit into a bore of a steel body. The steel body is rotationally fixed to a drum adapted to rotate about its axis.
Claims17
A high impact resistant tool, comprising:
- a cemented metal carbide substrate having a non-planar interface;
- a superhard material bonded to said cemented metal carbide substrate at said non-planar interface;
- a cemented metal carbide segment, said cemented metal carbide segment having a front end and a base end spaced apart from said front end, said cemented metal carbide substrate being bonded to said cemented metal carbide segment at said front end;
- a carbide stem formed in said base end of the cemented metal carbide segment;
- and,
- a steel body having an interfacial surface with a bore disposed therein, said bore being sized and shaped to receive said carbide stem in a press fit, said interfacial surface having a reentrant formed thereon.
3 more elements
A high impact resistant tool, comprising:
- a superhard material;
- a cemented metal carbide substrate, said superhard material being bonded to said cemented metal carbide substrate;
- a cemented metal carbide segment, said cemented metal carbide segment including:
- a front end, said cemented metal carbide substrate being bonded to said front end;
- a base end opposite said front end;
- a stem formed in said base end;
- and,
- a steel body, said steel body having a substantially flat interfacial surface between said steel body and said cemented metal carbide segment, said interfacial surface having reentrant and a bore formed therein, said bore being sized and shaped to receive said stem in a press fit.
5 more elements
Dependencies are inferred from the claim text.