Design considerations for a new high data rate LWD acoustic telemetry system

Vimal Shah, Wallace Gardner, Don H. Johnson, Sinan Sinanovic

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The first commercial acoustic telemetry system was successfully introduced in 2000 as part of a drill stem testing system. However, environmentally challenging LWD offshore applications and a need for higher throughput required a complete redesign of that system. Thus, the new system incorporates a new high power acoustic transmitter driven by an advanced signal processor that maximizes input energy into particular frequencies and therefore minimizes dispersion and distortion effects. Low-frequency acoustic attenuators were specifically designed to attenuate in-band noise entering the communication system. In addition, two other features were introduced as a part of the complete communication system. They were (1) an in-line wireless link to pickup, digitize, and transmit signals off the pipe while rotating and (2) a high data rate acquisition and telemetry processing system. The system is designed to work solo or in conjunction with a mud pulse telemetry system. This paper will discuss the system design considerations and the data rates associated with different modes of operation as well as results of initial field tests.
    Original languageEnglish
    Title of host publicationSPE Asia Pacific Oil and Gas Conference and Exhibition
    PublisherSociety of Petroleum Engineers
    Number of pages7
    DOIs
    Publication statusPublished - 2004

    Keywords

    • LWD acoustic telemetry system
    • LAT
    • drill stem testing systems
    • design considerations

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