Self-powered sensor for vibration measurement and safety monitoring of underground drilling tool

Abstract

The invention discloses a self-powered sensor for vibration measurement and safety monitoring of an underground drilling tool. The self-powered sensor comprises a shell, an arc-shaped support block, a nanometer friction material film, an induction electrode and a single chip microcomputer, wherein the shell is connected with the drilling tool, and a first acrylic plate is installed at the bottom of the shell; the arc-shaped support block is used for supporting a small ball to roll, an induction electrode group is adhered to the surface, which makes contact with the small ball, of the arc-shaped support block, and a second acrylic plate is connected to the bottom of the arc-shaped support block; the nanometer friction material film and the induction electrode are used for friction; the single chip microcomputer is connected with the induction electrode group, the small ball slides under the vibration effect of the drilling tool, and the single chip microcomputer is used for collecting an output signal and calculating the amplitude and the frequency according to the position of the induction electrode in the induction electrode group; and the second acrylic plate vibrates up and down along with the drilling tool, electrification by friction occurs between the nanometer friction material film of the second acrylic plate and the nanometer friction material film on the surface of the first acrylic plate, and the axial vibration frequency is calculated through the output signal. According to the self-powered sensor, the axial vibration frequency and the transverse vibration frequency and amplitude can be collected in real time, and additionally, the transverse vibration of the drilling tool can be monitored to realize alarm.

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 sensor for vibration measurement and safety monitoring of down-hole drilling tools. Background technique [0002] Drilling technology is mainly used in the evaluation and exploitation of underground mineral resources in my country. During the drilling process, the downhole drilling tool assembly will undergo different vibrations under the influence of alternating stress, which will cause fatigue damage and damage the drilling tool. There are three types of vibration that occur during the working process of drilling tools: torsional vibration, axial vibration, and lateral vibration, among which lateral vibration has the greatest impact on drilling tools. At present, the research on axial vibration is mature in the market, and vibration measurement systems such as MWD (Measurement While Drilling) and ...

AI Technical Summary

Problems solved by technology

At present, the research on axial vibration is mature in the market, and vibration measurement systems such as MWD (Measurement While Drilling) and LWD (Logging While Drilling) have been researched and manufactured, but there is a lack of relatively simple and low-cost tools that can monitor the lateral vibration of downhole drilling tools. Sensors, especially the lack of sensors for amplitude measurements

Moreover, with the increase of drilling depth, downhole sensors need longer cables or larger batteries to provide energy, which greatly affects drilling efficiency.

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