基于钻柱力学的钻井托压抑制方法研究OA

To address the issue of drilling support pressure and enhance drilling efficiency,this study uses whole well drill string dynamics theory and multi-body dynamics software to investigate the suppressive effects of stabilizer configuration on drilling support pressure behavior.Multi-body dynamics software was utilized to establish dynamic analysis models for drilling tools including roller bits,stabilizers,and drill rods.Based on formation lithology and dynamics theory,dynamic equations for mechanical drilling speed and drilling pressure fluctuations were established.The effectiveness of the analysis model was validated using logging data from a well in Dabei.The results show that the simulated data closely reflects the logging data,affirming the model's effectiveness.Configuring stabilizers can effectively suppress drilling support pressure phenomena,whereas altering the outer diameter of stabilizers does not mitigate drilling support pressure behavior.When properly configured,placing a single stabilizer away from the drill bit can increase drilling pressure by approximately 30%.Configuring dual stabilizers can reduce fluctuations in drill bit pressure and increase drilling pressure by approximately 30%,thereby effectively suppressing drilling support pressure behavior.For the target well,an optimized plan was proposed to enhance support pressure at the drill bit by 46.5%,effectively resolving the drilling support pressure issue.The study results provide theoretical support and reference for addressing drilling support pressure on site.