Study on the Monitoring and Analysis Method of the Working Efficiency of Torsional Impactors

The torsional impactor converts the kinetic energy of the drilling fluid into fixed-frequency mechanical circumferential vibration, which can effectively suppress the drilling stick–slip phenomenon and increase the mechanical drilling speed. However, due to various factors such as its performance, formation lithology, and construction parameters such as weight of bit and displacement, it is not possible to effectively monitor and evaluate the working condition and performance of the torsional impactor in the well by relying on surface observation data. In this paper, the torsional impactor is connected to a near-bit measurement tool to form a torsional impactor monitoring system. By experimentally measuring the vibration, rotational speed, bit weight, and torque data of the torsional impactor during operation, the data features are extracted by combining the time domain and frequency domain analysis methods to monitor the operating impact frequency of the torsional impactor and analyze the influence of different drilling parameters on the working efficiency of the torsional impactor. The analysis results show that this study can achieve the monitoring of the working status and working efficiency of the downhole speed lifting tool, which is beneficial to the optimization design of the speed lifting tool and the improvement of the working efficiency.