Electric heating – Metal heating – Cutting or disintegrating
Patent
1998-01-16
2000-01-04
Ryan, Patrick
Electric heating
Metal heating
Cutting or disintegrating
219 6911, 219 68, 175425, 175426, 175428, 175430, E21B 1046
Patent
active
060112328
ABSTRACT:
A method of manufacturing preform elements comprises the initial step of forming a preliminary component including a facing table of superhard material having a front face, a peripheral surface, and a rear surface bonded to a less hard substrate. The rear surface of the facing table and the front surface of the substrate are formed with inter-engaging projections and recesses to provide a non-planar interface between the substrate and facing table. There are then cut from the preliminary component a plurality of separate preform elements each having a facing table and substrate with a non-planar interface between them. The configuration of the non-planar interface of the preliminary component may vary with distance from its center, so that the non-planar interface of each preform element also varies in configuration across the width of the element.
REFERENCES:
patent: 5351772 (1994-10-01), Smith
patent: 5435403 (1995-07-01), Tibbitts
patent: 5460233 (1995-10-01), Meany et al.
patent: 5590729 (1997-01-01), Cooley et al.
patent: 5611649 (1997-03-01), Mattias et al.
patent: 5617928 (1997-04-01), Mattias et al.
Camco International (UK) Limited
Daly Jeffery E.
Elve M. Alexander
Ryan Patrick
LandOfFree
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