DRILLING BIT ROLLER CUTTER BEARING SUPPORT Russian patent published in 2018 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention relates to the field of drilling wells and can be used in drilling roller cone bits. Drill bit cutter bearing support contains two radial bearings for the taking of radial drilling forces perpendicular to the roller cutter axis, roller cutter and foot thrust hardened end face surfaces for the taking of axial forces along the roller cutter shaft, separated by intermediate washers, a lock ball bearing to ensure the bearing support assembly as a single unit. In two pairs of foot and roller cutter thrust hardened end face surfaces of the large and small sliding bearings washers of equal thickness from the same antifriction material are installed. Axial clearance in the small bearing when the axial force is applied is from 0 to Δ, where Δ is the total technological tolerance of the dimensioning between the roller cutter and foot small and large roller bearings thrust surfaces.

EFFECT: technical result consists in providing a reduced equivalent specific load on the large and small thrust bearings and their uniform wear and tear, as well as in increasing in the overall bearing support bearing capacity.

1 cl, 1 dwg