DRILL BIT CONE Russian patent published in 2000 - IPC

FIELD: drilling of deep wells. SUBSTANCE: drill bit cone is made with cutting structure members (milled or installed teeth) having several (two or more) rock-cutting tops located for simultaneous force action on broken rock and made with different protrusions above external surface of cone. In this case, one of tops from running-on side is higher than opposite one by value of amplitude of bit axial teeth vibrations. Presence on each cutting structure member of tops simultaneously acting on rock increases their combined action for chipping and breakage of rocks on well bottom. EFFECT: increased service life of drill bit and higher efficiency of its action on cut rocks. 3 cl, 7 dwg