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Borehole three-component magnetic gradient measuring device

A technology for measuring devices and magnetic gradients, which is applied to measuring devices, electric/magnetic detection for well logging records, geophysical measurements, etc., can solve the problem of the absence of three-component magnetic gradient measuring devices, and achieve great practical value and Economic value, good effect, and high degree of intelligence

Inactive Publication Date: 2011-05-11
北京奥地探测仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no three-component magnetic gradient measurement device with perfect structure and performance specially applied in drilling.

Method used

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  • Borehole three-component magnetic gradient measuring device
  • Borehole three-component magnetic gradient measuring device
  • Borehole three-component magnetic gradient measuring device

Examples

Experimental program
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Embodiment Construction

[0023] Below in conjunction with specific embodiment and accompanying drawing, the present invention will be further described: Embodiment: referring to accompanying drawing, the three-component magnetic gradient measuring device in the well is characterized in that: it is made up of uphole part and downhole part: the uphole part is provided with: cable drawworks and Cable, power supply, and computer controller equipped with input components, memory, and LCD display. The computer controller controls the retraction and unwinding of the cable winch, accurately records the position and depth of the cable in the well through the code disc, and performs the measurement data uploaded in the well. A computer controller that receives, processes, stores, and displays data and graphics on an LCD screen in real time; the downhole part is provided with a three-component fluxgate magnetic gradiometer 3 in a miniature well, and the magnetic gradiometer is equipped with a magnetic sensitive el...

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Abstract

The invention relates to a borehole three-component magnetic gradient measuring device which comprises an aboveground part and an underground part, wherein the aboveground part is provided with a reel truck, a cable, a power supply, as well as a computer controller with an input unit, a memorizer and an LCD display; the underground part is provided with a miniature borehole three-component fluxgate type magnetic gradiometer (3), a temperature sensor, a miniature borehole three-component gravity acceleration meter, an underground power supply, as well as an underground MCU (Microprogrammed Control Unit) in control connection with the magnetic gradiometer, the temperature sensor and the acceleration meter; in addition, a multiple-way switch converter and a 24-way analog-to-digital converter are further arranged, and the analog-to-digital converter is in signal connection with MCU of the aboveground part; all underground instruments are loaded in an exploring tube; and various underground measuring components are in signal connection with a multiplexer. The borehole three-component magnetic gradient measuring device provided by the invention is suitable for borehole magnetic gradient measurement and has the advantages of novel structure, accurate measuring effect, high efficiency, convenience in use and good self-control performance.

Description

technical field [0001] The invention belongs to geophysical detection equipment, and is a device for measuring magnetic field gradients at different positions in well drilling. Background technique [0002] The geomagnetic field has vector characteristics, that is, the geomagnetic field at any point can be decomposed into three components, namely two horizontal components (x, y) and one vertical component (z). Due to the difference in stratum structure, especially due to the influence of magnetic ore bodies, the strength and direction of the geomagnetic field at different locations are different, and this difference can be reflected by the three-component magnetic gradient value. In this way, the three-component magnetic gradient value of the non-directional position can be measured, and the magnetic field strength and directionality of each position can be determined according to the difference of the three-component magnetic gradient value, so as to determine the structura...

Claims

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Application Information

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IPC IPC(8): G01V3/40G01V3/26
Inventor 吴天彪王庆乙李肇威李学圣韩小申梁连仲黄涛陶照明徐立忠王海龙王菅营
Owner 北京奥地探测仪器有限公司
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