Optimal Energy Transfer Pipe Arrangement for Acoustic Drill String Telemetry

Kumar, Lakshmi Sutha; Han, Wei; Guan, Yong Liang; Sun, Sumei; Lee, Yee Hui

doi:10.1109/tgrs.2014.2306686

Cited by 17 publications

(3 citation statements)

References 15 publications

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“…where , , , and are the Young's modulus, density, longitudinal displacement, and cross-sectional area of drillstring, respectively. In view of the fact that the periodic structure will cause a redistribution and not merely a reduction of amplitude and spreading of the wave, attenuation mechanisms in the actual field environment, including viscous dissipation of energy into the surrounding drill mud and physical contact with the formation and well casing, are not included in (1). By introducing the mass coordinate and the acoustic impedance , (1) is rewritten as…”

Section: Model Adapted To the Problemmentioning

confidence: 99%

“…In the exploration industry, there is a need for some means of transmitting downhole drilling information, such as pressure, temperature, drilling direction, and formation information, to the surface [1,2]. With the development of electronic circuits and digital signal processing technologies, many downhole measurement tools in measurement while drilling (MWD) are developed to collect the downhole information [3].…”

Section: Introductionmentioning

confidence: 99%

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Multiple-Echo Suppression Modeling and Experimental Verification for Acoustic Transmission along Periodic Drillstring Using Dual Receivers

Jinfeng

Zhao

et al. 2014

Shock and Vibration

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In the oil industry, the accompanied reverberation is a major constraint in the transmission rate and distance because the drillstring is a heterogeneous assembly. Based on the transient impulse responses in uplink and downlink channels, an improved simplified echo suppression model with two acoustic receivers is presented in consideration of position optimization of single acoustic receiver. Then the acoustic receiving characteristics of transmitted signals in a length-limited periodic drillstring channel are obtained in single-and dual-receiver modes. An additive downward white Gaussian noise is also introduced in the channel. Moreover, an experimental rig is established by using a rotatable electromagnetic vibration exciter and two piezoelectric accelerometers, which are spaced one-quarter wavelength apart along a 6.3-meter simulated periodic drillstring. The ASK-, FSK-, and PSK-modulated square-wave pulse sequences at a transmission rate of 200 bit/s are applied to the simulated drillstring at a rotation speed of 0, 80, and 140 r/min, respectively. The experimental results show that the dual-receiver mode can exhibit a significantly improved average error bit ratio, which is approximately 2.5 to 3 times lower than that of the single-receiver mode, especially under the conditions of higher rotation speeds.

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Section: Model Adapted To the Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiple-Echo Suppression Modeling and Experimental Verification for Acoustic Transmission along Periodic Drillstring Using Dual Receivers

Jinfeng

Zhao

et al. 2014

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…However, as traditional wired communication suffers from practical difficulties such as cable installation and infrastructure adjustment when drilling string sections are added or removed, wireless communication is widely utilized in logging while drilling (LWD) [41]. In the development of stress wave-based LWD wireless communication, the drilling string, which consists of metal pipes and joints, is considered as a conduit for the propagation of information-carrying stress wave [2,42,43,44,45,46]. Compared to the conventional mud pulse telemetry in LWD, stress wave data transmission is less susceptible to the properties of the fluids in the borehole.…”

Section: Introductionmentioning

confidence: 99%

Design of a New Stress Wave-Based Pulse Position Modulation (PPM) Communication System with Piezoceramic Transducers

Ren

et al. 2019

Sensors

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Stress wave-based communication has great potential for succeeding in subsea environments where many conventional methods would otherwise face excessive difficulty, and it can benefit logging well by using the drill string as a conduit for stress wave propagation. To achieve stress wave communication, a new stress wave-based pulse position modulation (PPM) communication system is designed and implemented to transmit data through pipeline structures with the help of piezoceramic transducers. This system consists of both hardware and software components. The hardware is composed of a piezoceramic transducer that can generate powerful stress waves travelling along a pipeline, upon touching, and a PPM signal generator that drives the piezoceramic transducer. Once the transducer is in contact with a pipeline surface, the generator integrated with an amplifier is utilized to excite the piezoceramic transducer with a voltage signal that is modulated to encode the information. The resulting vibrations of the transducer generates stress waves that propagate throughout the pipeline. Meanwhile, piezoceramic sensors mounted on the pipeline convert the stress waves to electric signals and the signal can be demodulated. In order to enable the encoding and decoding of information in the stress wave, a PPM-based communication protocol was integrated into the software system. A verification experiment demonstrates the functionality of the developed system for stress wave communication using piezoceramic transducers and the result shows that the data transmission speed of this new communication system can reach 67 bits per second (bps).

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Signal attenuation simulation of acoustic telemetry in directional drilling

Shin

2019

J Mech Sci Technol

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Optimal Energy Transfer Pipe Arrangement for Acoustic Drill String Telemetry

Cited by 17 publications

References 15 publications

Multiple-Echo Suppression Modeling and Experimental Verification for Acoustic Transmission along Periodic Drillstring Using Dual Receivers

Multiple-Echo Suppression Modeling and Experimental Verification for Acoustic Transmission along Periodic Drillstring Using Dual Receivers

Design of a New Stress Wave-Based Pulse Position Modulation (PPM) Communication System with Piezoceramic Transducers

Signal attenuation simulation of acoustic telemetry in directional drilling

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