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

A technology of nano generators and vibration sensors, applied in friction generators, instruments, electrical devices, etc., can solve the problems of less reliability monitoring of drilling tools, and achieve improved working life and reliability, good sealing, and material less demanding effect

Active Publication Date: 2021-06-08
CHINA UNIV OF GEOSCIENCES (WUHAN)
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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

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

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Embodiment Construction

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] Please refer to figure 1 , 2 And 3, the embodiment of the present invention provides a kind of self-powered downhole drilling tool vibration sensor based on triboelectric nanogenerator, comprises casing, and the slide block 3 that accommodates in described casing, friction electrode 5, a plurality of sensor Electrode 6 and microcontroller.

[0027] The casing is a closed insulating casing, which is connected with a downhole drilling tool and vibrates synchronously with the drilling tool. Here, the housing is a hollow cylindrical cylinder, specifically comprising a hollow cylindrical shell 1 with an open upper end and a top cover 2 , the top cover 2 covers the upper port of the shell 1 and seals the upper port of the shell 1 .

[0028] Please re...

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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...

Claims

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Application Information

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IPC IPC(8): G01H11/06H02N1/04
CPCG01H11/06H02N1/04
Inventor 刘金润吴川
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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