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1. (WO2018087173) ROCK-CUTTING TOOL AND METHOD FOR MINE AND OIL DRILLING

Pub. No.:    WO/2018/087173    International Application No.:    PCT/EP2017/078653
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Thu Nov 09 00:59:59 CET 2017
IPC: E21B 10/573
Applicants: DIAROTECH S.A.
Inventors: DELWICHE, Robert
LAMINE, Etienne
Title: ROCK-CUTTING TOOL AND METHOD FOR MINE AND OIL DRILLING
Abstract:
The invention concerns a rock-cutting tool and the method for manufacturing this tool that comprises cutters (3) comprising a layer (5) of synthetic polycrystalline diamond (PCD), a diamond impregnation layer (6) with diamond particles and binding cobalt, characterised by the fact that the PCD layer rests directly, along a planar interface (8), on the diamond impregnation layer, the interface surface of which is planar by means of machining and on which diamond particles (12) are located.