E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/26 (2006.01) E21B 7/28 (2006.01)
Patent
CA 2503815
The present invention relates to a reamer assembly for widening a drilled pilot hole or for widening a hole that has been widened in a first step in a down-the-hole drilling operation, wherein the reamer assembly includes a shank (14) for attachment of the reamer to the end of a down-the-hole hammer drill and a conical drill bit or crown (15). The conical bit (15) of the reamer is divided into at least three segments (18) which are terminated with a transverse end surface (21) that directly connects said conical segments and at least three of said segments (18) include drill buttons (16) that are disposed equidistantly from the centre axis of the drill bit (15).
L'invention concerne un ensemble de trépan aléseur permettant d'élargir un avant-trou foré ou un trou ayant été élargi au cours d'une première étape dans une opération de forage au fond d'un puits, l'ensemble de trépan aléseur comprenant une tige (14) permettant de fixer le trépan aléseur sur l'extrémité d'un marteau perforateur de fond de puits et un trépan ou une couronne conique (15). Le trépan conique (15) du trépan aléseur est divisé en au moins trois segments (18) dont les extrémités présentent une surface terminale transversale (21) reliant directement les segments coniques et au moins trois des segments (18) comprennent des pastilles de forage (16) disposées à équidistance de l'axe central du trépan (15).
Atlas Copco Secoroc Ab
Kirby Eades Gale Baker
LandOfFree
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