Soundwave-while-drilling well logging device

A sound wave and logging technology, applied in drilling equipment, drill pipe, drill pipe, etc., can solve the problems of drilling collar wave interference, the difference between the wave velocity of formation bending wave and the wave velocity of shear wave, etc., and achieve the effect of overall function expansion.

Active Publication Date: 2011-08-24
INST OF ACOUSTICS CHINESE ACAD OF SCI
View PDF8 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the monopole and dipole measurement methods in the commonly used acoustic logging while drilling tools are: first, the dipole is used as the sound source, and there is serious drill collar wave interference in the received signal; There is a difference between the velocity of the formation bending wave and the velocity of the shear wave

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
  • Soundwave-while-drilling well logging device
  • Soundwave-while-drilling well logging device
  • Soundwave-while-drilling well logging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Those of ordinary skill in the art will appreciate that the following detailed description of the exemplary embodiments is illustrative only and is not intended to be limiting in any way. Other embodiments will readily appear to such skilled persons having the benefit of this disclosure. Reference will now be made in detail to implementations of the exemplary embodiments as illustrated in the several drawings. The same reference numerals will be used throughout the drawings and in the following detailed description to designate the same or like parts.

[0017] figure 1 It is a schematic diagram of the logging-while-drilling acoustic logging device. Such as figure 1 As shown, an acoustic logging device while drilling includes a drill collar 1, the drill collar top joint 2 is located at the top, the mud channel 3 is located at the center of the drill collar, the upper part of the upper stabilizer 5 is an acquisition and control circuit 4, and the upper stabilizer 5 Th...

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 a soundwave-while-drilling well logging device, which comprises a drill collar and a transmission energy converter arranged on the drill collar, wherein the transmission energy converter comprises a first end socket metal block and a second end socket metal block which are arranged at two ends of the transmission energy converter, a metal splint positioned in the middle of the transmission energy converter and a plurality of piezoelectric ceramic wafers which are positioned between the first end socket metal block, the second end socket metal block and the metal splint respectively; the number of the piezoelectric ceramic wafers is even, the direction of polarization of each piezoelectric ceramic wafer is the thickness direction, and the directions of polarizationof the adjacent piezoelectric ceramic wafers are opposite; and the length direction of the transmission energy converter is perpendicular to that of the drill collar. The soundwave-while-drilling well logging device can judge information such as the velocity of longitudinal waves and transverse waves, porosity, pore pressure and the like of formations, particularly soft formations (the velocity of the transverse waves of the formations is less than sound velocity of fluid in a well), the velocity of the transverse waves of the formations can be measured by a quadrapole mode to perform the analysis of terrestrial stress, and thus, the integral function of the energy converter is expanded.

Description

technical field [0001] The invention relates to an acoustic logging device while drilling, in particular to an acoustic logging transducer combination while drilling. Background technique [0002] In recent years, as the global industry’s demand for oil has increased year by year, highly deviated wells and horizontal wells are very active in oil exploration, and logging-while-drilling technology has developed rapidly. Almost all open-hole wireline logging projects can use logging-while-drilling well logging method. The sonic logging while drilling technology is one of the important methods of the logging while drilling technology, which has the characteristics of measuring while drilling. This technology uses the transmitting acoustic wave transducer installed on the drill collar to generate sound waves during the downhole drilling operation, propagates through the mud in the formation, and after a certain period of attenuation, the receiving acoustic wave transducer instal...

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): E21B49/00E21B17/16
Inventor 丛健生王秀明陈德华车承轩魏倩孙德兴梁希庭
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap