ROLLING CUTTER BIT SUPPORT Russian patent published in 2007 - IPC E21B10/22 

FIELD: rock-destroying instruments, namely, supports for drilling rolling cutter bits.

SUBSTANCE: support contains pivot bolt with circular recess and profiled section with flats, rolling cutter, in hollow of which circular clamp is made with grooves, profile of which is appropriate for profile of profiled section of pivot bolt, and forming a lock bearing with profiled section of pivot bolt. Circular recess of pivot bolt is made with width, evenly exceeding diameter of rod inserts, which are shifted one relatively to another along the pivot bolt axis and are mounted with possible interaction with opposite side surfaces of circular recess of pivot bolt.

EFFECT: increased operational resilience of support.

2 cl, 2 dwg