Measurement While Drilling (MWD) Signal Analysis, Optimization and Design

The only book explaining modern MWD technology, to include hardware design, signal processing and telemetry, offering unique approaches to high-data-rate well logging Trade magazines and review articles describe MWD in casual terms, such as positive versus negative pulsers, continuous wave systems, drilling channel noise, and attenuation, often devoid of technical rigor. However, few truly scientific discussions are available on existing methods, let alone the advances necessary for high-data-rate telemetry. Without a strong foundation building on solid acoustic principles, rigorous mathematics, and of course, fast, inexpensive and efficient testing of mechanical designs, low data rates will impose unacceptable quality issues to real-time formation evaluation for years to come. This book promises to change all of this. The lead author and M.I.T. educated scientist, Wilson Chin, and Yinao Su, academician, Chinese Academy of Engineering, and other team members have written the only book available that develops mud pulse telemetry from first principles, adapting sound acoustic principles to rigorous signal processing and efficient wind tunnel testing. In fact, the methods and telemetry principles developed in the book were recently adopted by one of the world's largest industrial corporations in its mission to redefine the face of MWD. The entire engineering history for continuous wave telemetry is covered-anecdotal stories and their fallacies, original hardware problems and their solutions, different noise mechanisms and their signal processing solutions, apparent paradoxes encountered in field tests and simple explanations to complicated questions, and so on, are discussed in complete tell all detail for students, research professors, and professional engineers alike. These include signal processing algorithms, signal enhancement methods, and highly efficient short and long wind tunnel test methods, whose results can be dynamically re-scaled to real muds flowing at any speed. A must-read for all petroleum engineering professionals! Inside this groundbreaking new volume, readers will find: An explanation of mud pulse technology clearly using scientific principles-ideas showing limitations of present systems and how they can be overcome Innovative methods for signal enhancements needed for very deep wells-constructive wave interference, sirens in series, special adaptations of frequency-shift-keying, and others A blueprint for high-data-rate mud pulse telemetry adopted by several of the world's top energy corporations, explained in simple-to-understand terms, from first principles and rigorous physics to advanced mathematical concepts for signal processing, noise removal and echo cancellation New wind short and long tunnel designs and test methodologies for mud sirens and turbines-from Wilson Chin, the originator of wind tunnel modeling for downhole applications