φ89 mm等壁厚螺杆钻具实验分析

Experimental Analysis on Uniform-thickness PDM

摘要:

等壁厚螺杆钻具与现有常规螺杆钻具相比具有长寿命、大扭矩、适用范围更广的特点。目前等壁厚螺杆钻具相关的研究工作都还停留在理论分析的阶段。本文系统地介绍了螺杆钻具的理论特性和实际工作特性，并结合室内实验及现场应用分析了等壁厚螺杆钻具的性能特点，验证了φ89 mm等壁厚螺杆钻具的理论性能，建立了等壁厚螺杆钻具容积效率、转速、扭矩、功率的计算模型。可以为等壁厚螺杆钻具设计及现场钻进参数优化、钻具选型提供指导和参考。

Abstract:

Compared with conventional PDM, uniform-thickness PDM has wider application range with long service life and high torque. The related research on uniform-thickness PDM is still in the stage of theoretical analysis. This paper introduces the theoretical performance and the actual working performance of PDM, analyzes the performance characteristics of 89mm uniform-thickness PDM based on the laboratory tests and field experiments and establishes the calculation models of volumetric efficiency, speed, torque and power, the results verify the accuracy of the theoretical performance of the uniform-thickness PDM, which could provide guidance and reference for uniform-thickness PDM design and drilling tools selection.