A self-powered downhole drilling tool vibration sensor based on triboelectric nanogenerator

Abstract

The invention provides a self-powered downhole drilling tool vibration sensor based on a triboelectric nanogenerator, comprising: a casing for connecting with the drilling tool; a slider slidably arranged in the casing, and a nanomaterial film is arranged on the surface of the slider; The friction electrode on the sliding path of the slider; a plurality of sensing electrodes arranged in the casing along the sliding direction of the slider; The friction electrodes are frictionally charged, and each sensing electrode generates electrostatic induction with the charged friction electrodes. The single-chip microcomputer detects the electrical signals generated on each sensing electrode, and calculates the vibration amplitude according to the positional relationship of each sensing electrode. The beneficial effects of the invention are as follows: the vibration amplitude and vibration frequency of the drilling tool can be calculated, so as to realize the monitoring of the working safety of the drilling tool; the axial vibration energy of the drilling tool is collected to supply power to the single-chip microcomputer, and the self-power supply of the sensor is realized.

Description

technical field [0001] The invention relates to the technical field of equipment for measuring vibration parameters of bottom-hole drilling tools, in particular to a self-powered down-hole drilling tool vibration sensor based on a friction nanogenerator. Background technique [0002] During the drilling process, the downhole drilling tool assembly will suffer fatigue damage under the influence of alternating stress, especially the drill bit and bottom drilling tool assembly are easily damaged by vibration and impact, and even cause engineering accidents. Damage to drilling equipment is related to different types of downhole vibrations. Therefore, it has become an imperative technology to monitor the state of the bottom hole drilling tool by monitoring the vibration and impact parameters while drilling. [0003] There are three main types of drill tool vibration, which are torsional vibration, axial vibration, and lateral vibration according to the degree of impact on the dr...

AI Technical Summary

Problems solved by technology

At present, the principle of monitoring the axial vibration parameters of drilling tools is mainly to measure the vibration of downhole drilling tools by using comprehensive logging equipment, MWD (measurement while drilling), LWD (logging while drilling), and FEWD (formation evaluation while drilling). The measurement data is mainly used to identify complex conditions downhole and optimize the structure of the drilling tool. There is less monitoring of the reliability of the drilling tool and a larger power supply is required. Therefore, it is urgent to develop a new monitoring sensor for collecting vibration data of the drilling tool.

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