Hybrid drill bit

摘要: A bit body is configured at its upper extent for connection into a drillstring. At least one fixed blade extends downwardly from the body, and has radially outermost gage surface. plurality of cutting elements secured to blade, preferably in row rotationally leading edge. leg rolling cutter mounted rotation on leg. stabilizer pad disposed between extending outward substantially The surface each can extend axially downward parallel axis or angled (non-parallel), spirally helically, relative axis.