Mathematical modeling and experimental investigation of a rotary valve generating sinusoidal pressure signals based on fan-arc-straight orifice

Yang, Nan; Yan, Zhidan; Yin, Xue; Jia, Mengzhi; Geng, Yanfeng

doi:10.1016/j.petrol.2021.109807

Cited by 11 publications

(1 citation statement)

References 9 publications

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“…For example, the rotor is a core component of the CW signal generator in drilling mud [23]. The design of the valve hole structure and synchronized motor drive in the signal generator are of significant importance for generating high-quality pulse signals, improving the performance of the MPT system and achieving high-speed transmission of downhole information [24]. Additionally, erosion of the mud and friction between components can bring losses to system components.…”

Section: High Costmentioning

confidence: 99%

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: High Costmentioning

confidence: 99%