Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Underground magnetic field detection while drilling device

A detection device and magnetic field technology, which is applied in the field of drilling and exploration engineering, and can solve problems such as detection while drilling and geomagnetic anomalies

Active Publication Date: 2020-05-08
CHINA UNIV OF PETROLEUM (BEIJING)
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a downhole magnetic field detection device while drilling, which is used to solve the problem of how to detect geomagnetic anomalies while drilling in the environment of high temperature, high vibration and long-term operation in the downhole

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Underground magnetic field detection while drilling device
  • Underground magnetic field detection while drilling device
  • Underground magnetic field detection while drilling device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0050] figure 1 A schematic cross-sectional structure diagram of a downhole magnetic field detection-while-drilling device provided by the present invention, figure 2 for figure 1 The schematic diagram of the internal structure of the downhole magnetic field detection while drilling device is shown, as shown in figure 1 and figure 2 As shown, the downhole magnetic field detection...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an underground magnetic field detection while drilling device. The device outputs PWM signals to a fluxgate drive circuit through a DSP and controls an FPGA to synchronously sample waveform data, the fluxgate drive circuit excites a fluxgate sensor to sense X-axis, Y-axis and Z-axis magnetic fluxes and converts the magnetic fluxes into voltage signals, a voltage signal sequentially passes through a band-pass filter, a gain circuit and a first analog-to-digital converter and is converted into sampling waveform data to be stored in the FPGA, the DSP reads the sampling waveform data in the FPGA, digital band-pass filtering is carried out on the sampling waveform data, digital phase-sensitive detection is carried out on a filtering signal obtained through digital band-pass filtering, the sampling waveform data are stored in the FPGA, digital integration is carried out on waveform data obtained after digital phase-sensitive detection, digital low-pass filtering and amplitude extraction are carried out on the waveform data obtained after digital integration to obtain the magnetic field intensity, the magnetic field intensity is sent to a central control communication circuit, and detection while drilling of the magnetic field intensity in an underground complex environment is achieved.

Description

technical field [0001] The invention relates to the technical field of drilling and exploration engineering, in particular to an underground magnetic field detection device while drilling. Background technique [0002] During the drilling process, the metal substances around the well drilling (for example, the ferromagnetic casing in the well drilling) will generate a magnetized magnetic field, which will cause geomagnetic anomalies near the metal substances, and the detection of geomagnetic anomalies during drilling can be positive. Provide technical support for the distance and orientation of metal substances near the drilling location. [0003] In the prior art, the method of collecting magnetic signals is to use a fluxgate to convert the external magnetic field into a voltage signal containing a second harmonic through a high-frequency drive circuit. The amplitude of the second harmonic is related to the strength of the external magnetic field, and then filtered The cir...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E21B47/13
Inventor 颜肖平梁华庆曹旭东
Owner CHINA UNIV OF PETROLEUM (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com