Improvements in or relating to elements faced with superhard material

A preform element, for example for use as a cutting element on a rotary drag-type drill bit, includes a facing table (28) of superhard material having a front face and a rear face bonded to the front face of a substrate (29) which is less hard than the superhard material. The rear face of the facing...

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Bibliographic Details
Main Authors DANIEL J SARIK, ALEX NEWTON, TERRY RICHARD MATTHIAS
Format Patent
LanguageEnglish
Published 14.07.1999
Edition6
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:A preform element, for example for use as a cutting element on a rotary drag-type drill bit, includes a facing table (28) of superhard material having a front face and a rear face bonded to the front face of a substrate (29) which is less hard than the superhard material. The rear face of the facing table comprises a surface formed with a plurality of spaced protuberances (31) and a plurality of spaced sockets (32), and the front face of the substrate comprises a surface which is bonded to the surface of the facing table and is formed with a plurality of spaced protuberances (34) which are bonded within said sockets (32) in the facing table, and a plurality of spaced sockets (35) within which are bonded said protuberances (31)on the facing table.
Bibliography:Application Number: GB19960005760