A Multifunctional Bottomhole Power Drilling Tool Rotary Speed Sensor Based on Triboelectric Nanogenerator
Source abstract
Abstract
The rotary speed of bottomhole power drilling tools during drilling operations provides feedback on bottomhole assembly malfunctions and borehole trajectory anomalies. However, existing rotary speed sensors suffer from limitations in their power supply methods, leading to reduced drilling efficiency and increased costs. This study presents a novel multifunctional rotary speed sensor with self-powered capabilities based on a triboelectric nanogenerator. Utilizing the triboelectric effect and electrostatic induction generated by the rotation of the bottomhole assembly, the sensor outputs triboelectric pulses correlated with rotational speed, enabling the measurement of both rotational speed and angle. Experimental results demonstrate a measurement range of 0 to 1000 rpm for rotational speed, an angular resolution of 30 degrees, a measurement error of less than 3.2%, and a maximum power output of 6.4 µW. The sensor operates reliably within a temperature range of 0 to 160 degrees Celsius and a relative humidity range of 0 to 90%, exhibiting excellent performance. Compared to conventional downhole sensors, the developed sensor’s self-powered functionality makes it more suitable for actual downhole operating conditions.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Advanced Fiber Optic Sensors · Conducting polymers and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
Institute of Exploration Techniques, Chinese Academy of Geological Sciences (CAGS), Langfang 065000, China
Funding
National Major Science and Technology Special Project
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