| 摘要 |
A drill bit with fixed cutter elements with - a hollow upper conical pin connector(l ) connectable to the lower module of a drill string, where the upper conical pin connector (1 ) has a transition to - an upper cylindrical module (2) with a central channel (4) for supplying bore fluid from the drill string, equipped with, - a lower bore (43) holding a cylindrical socket (34) from the lower module (3), connecting the upper and lower modules (2,3) of the drill bit, - where the central channel (4) continues down through the lower module (3) and branches out into nozzle channels (40) with nozzles (41 ) ending in the recesses (42) in between the wings (5) with fixed PDC-cutters (51 ), characterized by, - elastic shock-absorber elements (7) arranged in recesses (73) in the cylindrical wall of the bore (43), in the upper cylindrical module (2), where the elastic shock- absorbers (7) are assembled on the bolts (72) extending into the cylindrical socket (34) of the lower module (3). |
