Journal ArticleDOI
Use of dual waves for the elimination of reverberations in drill strings
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TLDR
In this paper, acceleration and strain are used as dual waves to remove part of the drill-string reflections and improve the signal-to-noise ratio (SNO) ratio.Abstract:
Drill-string waves can be used to transmit acoustic and seismic information from the bottom hole to the surface. Because the drill string is a heterogeneous assembly, the investigated signal is disturbed by reverberations. Removal of the reverberations generated in the drill string is obtained by measuring acceleration and strain, which have opposite reflection coefficients and are used as dual waves. Addition of the dual waves makes it possible to remove part of the drill-string reflections and improve the signal-to-noise ratio.read more
Citations
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Journal ArticleDOI
Seismic‐while‐drilling by using dual sensors in drill strings
TL;DR: In this paper, the acceleration and strain of drill-string dual fields have been measured to remove reflections of the drill-bit waves in the acquisition phase and to improve pilot deconvolution.
Journal ArticleDOI
Drill‐bit seismic monitoring while drilling by downhole wired‐pipe telemetry
TL;DR: In this paper, the authors present a drill-bit seismic-while-drilling (DBSD) method based on the recording of reference (pilot) signals which enable us to recognize and process the signal of the downhole drill source, thus obtaining impulsive seismograms after the crosscorrelation and deconvolution of the pilot signals and the seismic data recorded by surface or crosswell geophones.
Journal ArticleDOI
Dual wavefields from distributed acoustic sensing measurements
TL;DR: In this article, the authors developed a modified data extraction method and found that, as a result of the dense spatial distribution of recording points along the optic cable, DAS can provide two linked wavefield components in the axial direction, even when using a single 1D cable line.
Journal ArticleDOI
Seismic-while-drilling drill-bit source by ground force: Concept and application
TL;DR: For four decades, the use of the drill-bit seismic source has been evaluated extensively and investigated for seismic-while-drilling (SWD) purposes as mentioned in this paper, and the results showed that after an initial diffusion phase, howeve...
Proceedings ArticleDOI
Dual Seismic Fields From Distributed Acoustic Sensors
TL;DR: In this paper, the authors show that, as a result of the dense spatial distribution of recording points along the optic cable, DAS can providetwo field components in theaxial direction, even when using a single one-dimensional line.
References
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Journal ArticleDOI
The use of drill‐bit energy as a downhole seismic source
James W. Rector,Bruce P. Marion +1 more
TL;DR: In this paper, a new wellbore seismic technique uses the vibrations produced by a drill bit while drilling as a downhole seismic energy source, which is described as "inverse" VSP because the source and receiver positions of conventional VSP are reversed.
Journal ArticleDOI
Acoustical properties of drill strings
TL;DR: In this paper, the basic principles of acoustic wave propagation in the periodic structure of the drill string are examined through theory, laboratory experiment, and field test, and the results indicate the existence of frequency bands that are virtually free of attenuation and suitable for data transmission at high bit rates.
Journal ArticleDOI
Impact of the seismic 'While Drilling' technique on exploration wells
Francesco Miranda,L. Aleotti,F. Abramo,Flavio Poletto,A. Craglietto,Sergio Persoglia,Fabio Rocca +6 more
TL;DR: In this paper, the authors use the noise produced by the bit during drilling as a seismic source for producing reciprocal VSPs, which helps to overcome the difficulties of conventional surveying techniques.
Journal ArticleDOI
The propagation of sound waves in drill strings
TL;DR: In this article, the authors presented new data for the propagation of elastic waves in a 2-km drill string and used elastic wave propagation as a carrier signal to transmit data from the bottom of the well to the operator.
Journal ArticleDOI
Simulation of stress waves in attenuating drill strings, including piezoelectric sources and sensors
José M. Carcione,Flavio Poletto +1 more
TL;DR: A time-domain algorithm is developed for the propagation of one-dimensional axial, torsional, and flexural stress waves, including transducer sources and sensors, and simulates the passbands and stopbands due to the presence of the coupling joints and pulse distortion and delay due to nonuniform cross-section areas.
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