空气冲旋钻井机械钻速仿真算法  

Simulation of the penetration rate (ROP) of the air percussion drilling

作　　者：林元华[1] 李润方[2] 施太和[1] 梁政[1] 林腾蛟[2] 

机构地区：[1]西南石油学院石油管力学和环境行为重点实验室,成都610031 [2]重庆大学机械传动国家重点实验室,重庆400030

出　　处：《重庆大学学报（自然科学版）》2004年第8期1-6,共6页Journal of Chongqing University

基　　金：美国Smith公司赞助的国际合作项目(国际97-128);国家自然科学基金资助(59804009)

摘　　要：钻井机械钻速预测是难题。以前,研究者们常根据现场数据或试验数据,用统计拟合分析方法得出机械钻速的经验或半经验关系式。这些经验或半经验公式包括一些很难确定的系数准确性和可靠性差。为此,作者结合三牙轮钻头有关的理论,建立了空气冲旋钻井钻头的真实数学模型、真实井底模型和钻头牙齿与井底岩石互作用模型,用计算机仿真方法预测出了空气冲旋钻井机械钻速。使用表明,该模型可靠,计算结果与实际机械钻速基本一致,研究成果可用于冲旋钻头改进、优化设计和钻井参数优选。It is difficult to calculate the penetration rate (ROP) of percussion drilling. In the early research, the empirical or semiempirical formulae of the ROP are derived from the laboratory or field data collected by the researchers. However, the ROP value of the formulae is not as accurate as that in the field. Benefiting from the dynamic model, the geometric structure model and the theory of the roller cone bit, the mathematical model of the hammer bit, the mathematical model of the true bottom hole and the mathematical model between the tooth and the rock of the hammer bit are established. Hence the ROP of the air percussion drilling can be predicted by simulation. Field tests show the models are reliable and the results are coincident with that in the field. The research can help to redesign the hammer bit and optimize the drilling parameters.

关 键 词：空气冲旋钻井 冲旋钻头 机械钻速 仿真 岩石破碎 

分 类 号：O347.6[理学—固体力学] TP391.9[理学—力学]