Research on Mud Pulse Signal Starting Time Extracting Algorithm in MWD

Zhang, Guo Yun; Tu, Bing; Zhan, Teng Xi

doi:10.4028/www.scientific.net/amm.525.685

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…( ) ( ) ( ) ( ) ( ) Noise that affects mud pulse signals includes mud pump noise, reflection noise, bottom-hole mechanical vibrations, drill string vibrations, electromagnetic interference, pulse noise, and mud friction [52,53]. Among them, mud pump noise is the largest noise source.…”

Section: Noise Analysismentioning

confidence: 99%

“…However, it has obvious limitations when dealing with non-stationary processes because it can only capture the overall frequency components of a signal segment, without providing information about the frequency characteristics at each moment. In the case of non-stationary mud pulse signals with the frequency varying over time, the multiresolution property of the wavelet transform is more suitable for denoising purposes [26,52].…”

Section: Wavelet Transformmentioning

confidence: 99%

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A Review of Communication Technologies in Mud Pulse Telemetry Systems

Li,

2023

Electronics

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Mastering real-time and accurate downhole information is crucial for ensuring drilling safety, improving drilling efficiency, and maximizing economic benefits. In recent years, logging while drilling (LWD) technologies, represented by mud pulse telemetry (MPT), achieved significant success. However, they still face challenges such as a large amount of downhole information conflicting with low information transmission rates, severe channel distortion, strong noise interference, and weak surface receiving signals. Therefore, this review collects and updates the papers, patents, and conference articles in the relevant field over the past ten years. Starting from the basic structure of communication systems, the downhole signal coding and modulation technologies of the MPT system are discussed. The attenuation reflection brought by the mud channel and various noise interferences in the system are described. The surface noise cancellation, channel equalization, synchronization, and decoding are studied in detail. By analyzing the theoretical principles, development breakthroughs, and relevant challenges that can improve the development of LWD technologies, this review aims to assist researchers in the field in obtaining the latest references and strategies.

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Section: Noise Analysismentioning

confidence: 99%

Section: Wavelet Transformmentioning

confidence: 99%

A Review of Communication Technologies in Mud Pulse Telemetry Systems

Li,

2023

Electronics

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“…Experts and scholars have set up theoretical models of drilling trajectory control and have studied the dynamic basic equations of bottom-hole assembly (BHA) [23][24][25]. However, petroleum companies still lack advanced surface and downhole dynamic MWD systems.…”

Section: The Measuring Principle Of the Lateral Force In The Drilling...mentioning

confidence: 99%

Study of Downhole Lateral Force Measurement Modelling and Devices in Petroleum Exploration

Deng

et al. 2022

Energies

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Measurement while drilling (MWD) technology is important for obtaining downhole parameters. As an essential parameter in drilling engineering, lateral force provides a powerful reference basis for judging the downhole drilling direction. Although stress measurement technology has matured, research on downhole lateral forces, especially near-bit lateral forces during the drilling process in petroleum exploration, is lacking. Based on the force analysis of a short measurement circuit, the lateral force measurement value of a drill bit and centralizer was converted to a drill string’s radial-bending-force measurement. Two perpendicular lateral force components were measured using strain gauge technology, a lateral force measurement theory model was established, and a set of MWD systems was designed according to the model. The systems’ function was verified through laboratory and field tests, and the field-test data were successfully obtained in the field application. The test results showed that the tested MWD system had acceptable accuracy, stability, and reliability and had the application potential to measure lateral force in the drilling industry. This article provides a new idea to study lateral force while drilling, which is of great significance to oil-drilling exploration and development.

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Research on Mud Pulse Signal Starting Time Extracting Algorithm in MWD

Cited by 2 publications

References 4 publications

A Review of Communication Technologies in Mud Pulse Telemetry Systems

A Review of Communication Technologies in Mud Pulse Telemetry Systems

Study of Downhole Lateral Force Measurement Modelling and Devices in Petroleum Exploration

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