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

Underground electromagnetic logging instrument

A technology of electromagnetic logging and magnetic field, which can be used in wellbore/well components, measurement, earth-moving drilling, etc., and can solve problems such as inaccurate measurement

Pending Publication Date: 2021-10-22
CHINA PETROLEUM & CHEM CORP +1
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this application is to provide a downhole electromagnetic logging tool to solve the problem of inaccurate measurement of existing logging tools

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 electromagnetic logging instrument
  • Underground electromagnetic logging instrument
  • Underground electromagnetic logging instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Embodiment 1 of downhole electromagnetic logging tool:

[0027] The downhole electromagnetic logging tool is used to detect the shape of the casing, in order to display the detection results, such as figure 1 As shown, the downhole electromagnetic logging tool 3 sends the detected data to the upper computer 1 on the well through the data power cable 2, and the upper computer 1 displays the data curve and judges whether the casing can continue to be used, and the upper computer 1 sends the downhole electromagnetic logging data. The well tool 3 supplies power and sends control commands.

[0028] Downhole electromagnetic logging tool 3 such as figure 2 As shown, it includes a DSP processor 4 (that is, a control module), an instrument housing 5, a hydraulic centralizer 6, a natural gamma ray probe 7, a motion trajectory recording module 8, a magnetic field array sensor 9, a temperature sensor 10, a power drive module 11, and Transmitting coil 12, lower transmitting coil ...

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 relates to an underground electromagnetic logging instrument. The underground electromagnetic logging instrument comprises a transmitting system, a magnetic field array sensor and a control module; the transmitting system and the magnetic field array sensor are both connected with the control module; the transmitting system comprises an upper transmitting coil and a lower transmitting coil; the upper transmitting coil and the lower transmitting coil are arranged above and below the magnetic field array sensor respectively; the upper transmitting coil and the lower transmitting coil generate magnetic fields with opposite polarities, so that the magnetic fields are gathered; and the magnetic field array sensor receives a secondary magnetic field to complete detection of a sleeve. When the directions of the magnetic fields generated by the upper transmitting coil and the lower transmitting coil are opposite, the polarities of the ends, close to the magnetic field array sensor, of the upper transmitting coil and the lower transmitting coil are the same, and the generated magnetic fields are denser; and therefore, when the upper transmitting coil and the lower transmitting coil are closed, the sleeve can generate a larger secondary magnetic field, and more sleeve information is carried and is received by the magnetic field array sensor, so that the detection of the sleeve is more accurate.

Description

technical field [0001] The invention relates to a downhole electromagnetic logging instrument, which belongs to the field of oil and gas field engineering logging equipment. Background technique [0002] At present, with the prolongation of the production life of production wells in oil and gas fields, the number of wells with casing deformation is increasing year by year. It is necessary to know the deformation of downhole casing in time to guide the next operation measures. Traditional casing condition detection technologies, such as ultrasonic downhole TV logging, Eagle Eye TV logging and multi-arm caliper logging, all belong to the pipe wall imaging logging method. Contact the inner wall of the casing to measure. Especially in high-sulfur gas fields, permanent packers are used in downhole tubing strings. Before the tubing operation, it is necessary to implement a series of measures such as well killing, oil layer temporary plugging, and casing milling packers. The proce...

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
Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00E21B47/085E21B47/092E21B47/113E21B47/26E21B47/04E21B47/07
CPCE21B47/00E21B47/04E21B47/113E21B47/085E21B47/26E21B47/092E21B47/13E21B47/07G01V11/002
Inventor 张庆生徐菲黄华张立罗庆李晓蕾张诚宋胜利
Owner CHINA PETROLEUM & CHEM CORP
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