Factors to Influence the Trajectory Control Ability of a Reverse Push-the-Bit Rotary Steerable System

The reverse push-the-bit rotary steerable method based on the principle of a “labor-saving lever” provides feasible technical solution for further improving trajectory control ability drilling system, prolonging system’s service life and increasing speed. In order to reveal working characteristics such deeply, influence key structural parameters system its is studied finite element method. results show that, with certain distance from bit centralizer, flexible joint, joint paranoid mechanism, mechanism centralizer are main factors affect ability. Reducing stiffness shortening optimizing keys improve utmost. performance optimized obviously better than existing method, but actual effect needs rely on-site verification optimization.