【摘要】 根据三点定圆的数学原理,提出了导向钻具几何造斜率的精确计算公式,进而给出了简明的实用计算公式。文章的几何造斜率计算公式弥补了原三点定圆法没有考虑结构弯角位置对钻具造斜率影响的缺陷,揭示了三点定圆法误差过大的主要原因,分析了影响导向钻具几何造斜率的主要因素。还结合实例,阐述了利用几何造斜率进行弯壳体导向钻具组合设计的原理和方法。更多还原

【Abstract】 According to the mathematical principle of “3 points determined a circle”, the accurate calculation formula of geometric deflection rate of guide drilling tool is made. Then, the simplified practical calculation formula is derived. The calculation formula of geometric deflection rate overcomes the shortcomings, i.e. the original “3 points determined a circle” method doesn’t consider the influence of the structural bending position on the deflection rate of the drilling tool. The main reasons why the “3 points determined a circle” method makes so big error are revealed. The main factors to influence the geometric deflection rate of guide drilling tool are analyzed. With real cases, the principle and method of the bent housing guide tool design by geometric deflection rate are explained.更多还原