E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/56 (2006.01)
Patent
CA 2197351
An integral tool bit for drilling a rock formation, including a cemented metal carbide holder (30) attached to the tool and joined, e.g. soldered, to a plate (34) in the form of a cylindrical disc made from polycrystalline diamond particles and having a side wall (40) and a substantially flat free surface (36), said plate (34) being positioned so that the plane of its free flat surface (36) is at an acute angle ( alpha ) to the line (N) normal to the surface (25) of the rock formation, and said angle being directed in the same direction as the forward direction (F) of the drill bit so that the plate engages the rock formation with its side wall (40).
L'invention concerne un taillant d'outil monobloc pour le forage d'une formation rocheuse, du type comprenant un support (30) en carbure métallique cémenté, fixé sur l'outil et auquel est liée, par exemple par brasage, une plaquette (34) en forme de disque cylindrique formée à base de particules de diamant polycristallin et comprenant une paroi latérale (40) et une face libre sensiblement plate (36), la plaquette (34) est orientée de manière que le plan de sa face plate libre (36) fasse avec la normale N à la surface (25) de la formation rocheuse un angle aigu (.alpha.), orienté dans le même sens que le sens de déplacement (F) du taillant, de sorte que la plaquette attaque la formation rocheuse par sa paroi latérale (40).
Besson Alain
Delwiche Robert
Db Stratabit S.a.
Robic
Total
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