Cutting elements and methods of manufacture thereof

A cutting element for a rotary drill bit includes at least one insert (20) of polycrystalline diamond of a kind incorporating a carbonate as a sintering binder-catalyst. The insert (20) is mounted by being at least partly surrounded by a support body (21) of conventional polycrystalline diamond of a...

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Bibliographic Details
Main Authors NIGEL DENNIS GRIFFIN, MALCOLM ROY TAYLOR
Format Patent
LanguageEnglish
Published 08.10.2003
Edition7
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
LIME, MAGNESIA
METALLURGY
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Summary:A cutting element for a rotary drill bit includes at least one insert (20) of polycrystalline diamond of a kind incorporating a carbonate as a sintering binder-catalyst. The insert (20) is mounted by being at least partly surrounded by a support body (21) of conventional polycrystalline diamond of a kind incorporating a sintering binder-catalyst selected from cobalt and other iron group elements or alloys thereof. The insert (20) and support body (21) may be integrally bonded to a substrate during manufacture. Either the insert (20) or support body (21) may be pre-sintered or sintered during formation of the cutting element.
Bibliography:Application Number: GB20000015788