Mechanical Friction Simulation and Optimization Design of Floating Bearing of Mechanical Tricone Bit

Abstract This paper aims to find out the most vulnerable position and suitable clearance ratio of floating sleeve between inside outside tricone bit. In this paper, mechanical analysis model drill bit is established get simulated working condition tri-cone bit, then stress bearing simulated. Finally, multi-factor variable orthogonal test method used optimize sleeve. The results show that simulation are consistent with wear sleeve: during operation sleeve, edge position, largest deformation opening recommended internal 0.06–0.07 mm, external 0.02–0.04 2.0–2.4.