Self-powered downhole drilling tool vibration sensor based on friction nanometer generator

Abstract

The invention provides a self-powered downhole drilling tool vibration sensor based on a friction nanometer generator. The sensor comprises a shell used for being connected with a drilling tool; a sliding block which is arranged in the shell in a sliding mode, wherein a nanometer material film is arranged on the surface of the sliding block; a friction electrode which is arranged on a sliding path of the sliding block; the induction electrodes which are arranged in the shell at intervals along the sliding direction of the sliding block; and a single chip microcomputer which is respectively connected with the induction electrodes. The sliding block slides under the vibration effect of the drilling tool, the nanometer material film and the friction electrode are electrified through friction, electrostatic induction is generated between the induction electrodes and the electrified friction electrode, and the single-chip microcomputer detects the electric signals generated on the induction electrodes and calculates the vibration amplitude according to the position relation of the induction electrodes. The self-powered downhole drilling tool vibration sensor has the beneficial effects that the vibration amplitude and the vibration frequency of the drilling tool can be calculated, and the working safety condition of the drilling tool can be monitored; 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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