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Machine translation
1. (WO1981002761) DRILL TOOL
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002761    International Application No.:    PCT/SE1981/000031
Publication Date: 01.10.1981 International Filing Date: 03.02.1981
IPC:
E21B 10/04 (2006.01), E21B 10/32 (2006.01), E21B 10/40 (2006.01), E21B 10/56 (2006.01), E21B 10/66 (2006.01)
Applicants:
Inventors:
Priority Data:
8002320 26.03.1980 SE
Title (EN) DRILL TOOL
(FR) OUTIL DE PERCAGE
Abstract: front page image
(EN)A drill tool for rotary and/or percussion drilling with drill rod means (14) within casing tube means (15) comprises a centric cutting bit (11) and an eccentric reamer cutter (12), both provided with hard metal inserts. For purposes of obtaining a life of the drill tool as long as possible the first frontal insert (23) on the reamer cutter (12) is positioned in front of the first peripheral insert (18) when seen in the rotational direction (D) during drilling, and the centric cutting bit (11) provided with more inserts on the half (38) of its front surface opposed to the reamer cutter (12) during drilling than on the other half (39).
(FR)Un outil de percage pour le percage par rotation et/ou percussion avec une tige de foret (14) dans un tube de logement (15) comprend une meche centrale (11) et une fraiseuse-aleseuse excentrique (12), ayant toutes deux des insertions en metal dur. Dans le but d"allonger le plus possible la vie de l"outil de percage, la premiere insertion frontale (23) sur la fraiseuse-aleseuse (12) est positionnee devant la premiere insertion peripherique (18) lorsque l"on regarde dans le sens de rotation (B) pendant le percage, et la meche centrale a tailler (11) est pourvue d"un plus grand nombre d"insertions sur la moitie (38) de sa surface avant opposee a la fraiseuse-aleseuse (12) pendant le percage que sur l"autre moitie (39).
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)