Sub-Degree-Per-Hour MEMS Gyroscope for Measurement While Drilling at 300°C

David Lin, Robert MacDonald, Dorin Calbaza, Brian Scherer, Tammy Johnson, Tim Toepfer, David Shaddock, Emad Andarawis

Peer Reviewed

Abstract:	The orientation module of MWD tool provides the critical drill bit orientation information, including azimuth, inclination and toolface in order to control the path of wellbore. Although high end navigation grade gyroscope can meet the accuracy requirement for azimuth finding, the requirements of cost, size and reliability under harsh environment have largely limited the deployment of gyroscopes in MWD tools. To overcome these constraints, GE Research has developed a low cost, MEMS based Multi-Ring Gyroscope (MRG) capable of azimuth-seeking in MWD applications at 300oC. The MRG prototype has been demonstrated to achieve angular random walk (ARW) better than 0.003 deg/rt(hr) and bias instability of 0.01 deg/hr, capable of meeting azimuth finding accuracy better than 0.25 deg. It has also been tested to remain fully operational at 300 oC.
Published in:	2020 IEEE/ION Position, Location and Navigation Symposium (PLANS) April 20 - 23, 2020 Hilton Portland Downtown Portland, Oregon
Pages:	1425 - 1431
Cite this article:	Lin, David, MacDonald, Robert, Calbaza, Dorin, Scherer, Brian, Johnson, Tammy, Toepfer, Tim, Shaddock, David, Andarawis, Emad, "Sub-Degree-Per-Hour MEMS Gyroscope for Measurement While Drilling at 300°C," 2020 IEEE/ION Position, Location and Navigation Symposium (PLANS), Portland, Oregon, April 2020, pp. 1425-1431. https://doi.org/10.1109/PLANS46316.2020.9110136
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