CAJ | 학술논문

定向钻井PDC钻头的优化设计和导向性能分析需要准确计算PDC切削齿的切削面积、切削体积和切削弧弧长等切削参数。针对弯外壳螺杆马达或推靠式旋转导向系统，运用空间解析几何理论和数值计算方法，分析了PDC钻头在井底的运动状态，建立了切削齿的运动轨迹方程和切痕曲线方程。综合考虑了钻头偏转角、钻头的复杂运动、钻头结构参数及切削齿切削的先后次序等因素的影响，建立了切削齿的切削面积、切削体积和切削弧弧长等切削参数的数值计算方法，为PDC钻头的计算机优化设计和定向钻井PDC钻头的导向性能分析提供了一种分析手段。实例计算表明，模型和方法具有实用性，可进一步推广应用。
정향찬정PDC찬두적우화설계화도향성능분석수요준학계산PDC절삭치적절삭면적、절삭체적화절삭호호장등절삭삼수。침대만외각라간마체혹추고식선전도향계통，운용공간해석궤하이론화수치계산방법，분석료PDC찬두재정저적운동상태，건립료절삭치적운동궤적방정화절흔곡선방정。종합고필료찬두편전각、찬두적복잡운동、찬두결구삼수급절삭치절삭적선후차서등인소적영향，건립료절삭치적절삭면적、절삭체적화절삭호호장등절삭삼수적수치계산방법，위PDC찬두적계산궤우화설계화정향찬정PDC찬두적도향성능분석제공료일충분석수단。실례계산표명，모형화방법구유실용성，가진일보추엄응용。
The optimized design of PDC bit for directional drilling and steering performance analysis need accurate calculation of cutting parameters like cutting area, cutting volume and cutting arc length of PDC cutting teeth. In line with different drilling tools-bent housing screw motor or pushing rotational steering system, this paper analyzed the motion status of PDC bit at bottom hole, established the trajectory of cutting teeth and cutting curvilinear equation. Also the numerical computing method was established for cutting area, cutting volume and cutting arc length of the cutting teeth according to bit delfection angle, complex bit motion, bit structure parameters and the sequence of cutting teeth, providing a analysis method for computerized optimal design of PDC bit and the analysis of steering performance of PDC bit. Practical calculation shows that the model and method are practical and can be further promoted.