Abstract: Based on the theory of anisotropic deflection of strata, a mathematical expression F₁=(1/2)hsin2(β-α)·P is derived for the direct calculation of the deflection force of strata. It helps simplify calculations in designing pendulum drill astembly for deviation control and in determining anisotropic parameters besides making quantitative analysis of the total deflection force acting on the bit, A method of calculation for deflection control with a pendulum drill assembly of some fixed length is proposed, which has been tried out in a number of wells and proved to be practical.

摘要： 本文根据地层各向异性造斜理论,推导了地层造斜力的直接计算模式F₁=(1/2)hsin2(β-α)·P.利用这个模式不仅能简化钟摆钻具控制井斜的计算,准确而又方便的计算确定地层各向异性指数,还可以结合钻柱力学对钻头上的总偏斜力进行定量分析,利用这个模式作者还提出了用一定长度钟摆钻具控制井斜的计算方法。多口井的现场验证表明是符合钻井实际情况的。

关键词: 地层造斜力, 计算与应用, 各向异性指数, 钟摆钻具, 钻头偏斜, 钻柱力学, 现场验证, 计算模式, 井斜控制, 地层各向异性