Patent ID: 9464485
Filing Date: 2016-10-11
CPC Classification: E21B

Claim Text:
1. A drill bit with fixed cutter elements, comprising: a hollow upper conical pin connector connectable to a lower module of a drill string; the lower module of the drill string, including wings with fixed polycrystalline-diamond cutters; an upper cylindrical module with a central channel for supplying bore fluid from the drill string, the upper conical pin connector having a transition to the upper cylindrical module; and a lower axial bore equipped in the upper cylindrical module, the lower axial bore holding a cylindrical socket from the lower module, and connecting the upper and lower modules of the drill bit, wherein the central channel continues down through the lower module and branches out into nozzle channels with nozzles ending in recesses in between the wings of the lower module, wherein elastic shock-absorber elements are arranged in recesses in a cylindrical wall of the lower axial bore, in the upper cylindrical module, and the elastic shock-absorbers are assembled on bolts extending into the cylindrical socket of the lower module, and wherein the elastic shock-absorber elements are elliptic, with largest axes thereof arranged at right angles to an axis of the drill bit.