冲旋钻井钻头仿真模型的建立研究  

Research on How to Establish the True Simulation Model of Hammer Bits

作　　者：林元华[1] 施太和[1] 梁政[1] 巫才文[2] 李润方[3] 

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,四川成都610500 [2]四川石油管理局川中油气公司机械厂,四川遂宁629000 [3]重庆大学机械传动国家重点实验室,重庆400000

出　　处：《石油钻探技术》2004年第2期8-11,共4页Petroleum Drilling Techniques

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

摘　　要：针对钻井机械钻速预测研究中的不足,提出用计算机仿真方法来研究冲旋钻井的机械钻速。为此,首先对冲旋钻头常用的牙齿面进行离散化后,再结合冲旋钻头的结构特点和尺寸,利用坐标变换建立了冲旋钻井钻头的真实数学模型。该模型能准确可靠地描述钻头的形状和结构,是冲旋钻井机械钻速预测的基础。As for the prediction of the penetration rate (ROP), the empirical or semi-empirical formulae of the ROP are derived from the laborat ory or field data collected by the researchers. In the fact, the formulae includ e some coefficients difficultly to be got, which limits their uses; what's more, the penetration rate value of the formulae is not as accurate as that in the fi eld. Hence, predicting the ROP by computer simulation is put forward. The true s imulation model for hammer bits is obtained, which can describe the structures a nd shapes of hammer bits and is the base of the computer simulation.

关 键 词：冲击旋转钻井技术 钻头 机械钻速 岩石性质 钻井参数 转速 水力参数 

分 类 号：TE242.7[石油与天然气工程—油气井工程]