E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/26 (2006.01) E21B 10/30 (2006.01)
Patent
CA 2438454
The present invention provides a reamer (100) having at least one journal body (110) and at least one toroidal cutter body (116). The toroidal cutter body (116) has a maximum diameter (MD), an outer perimeter (OP) and a plurality of cutting elements (112, 145, 149) on the cutting surface (118). The toroidal cutter body is rotatably attached to the journal (110). When in the installed position, the axis of rotation (RA) of the at least one toroidal cutter body (116) intersects the longitudinal axis of the drill string at an acute angle.
L'invention concerne un aléseur (100) comportant au moins un corps de tourillon (110) et au moins un corps de coupe toroïdal (116). Ledit corps de coupe toroïdal (116) présente un diamètre maximal (MD), un périmètre extérieur (OP) et une pluralité d'éléments de coupe (112, 145, 149) sur la surface de coupe (118). Le corps de coupe toroïdal est monté rotatif sur le tourillon (110). Lorsqu'il est en position de montage, l'axe de rotation (RA) du corps de coupe toroïdal (116) (au moins au nombre de un) coupe l'axe longitudinal du train de tiges de forage, en un angle aigu.
Finlayson & Singlehurst
Rives Allen Kent
Tiger 19 Partners Ltd.
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