Downhole telemetry system having an electro-magnetic reciever and a mud pulser and method therefor
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United States of America Patent
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Nov 21, 2023
Grant Date -
Aug 19, 2021
app pub date -
Jan 28, 2021
filing date -
May 1, 2017
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Abstract
A complete telemetry system and methods for downhole operations. The telemetry system includes an instrumented near-bit sub located below the Mud Motor and connected to the drill bit as well as a conventional MWD tool located above the mud motor. Parameters such as inclination of the borehole, the natural gamma ray of the formations, the electrical resistivity of the formations, and a range of mechanical drilling performance parameters are measured. Electromagnetic telemetry signals representing these measurements are transmitted uphole to a receiver associated with the conventional MWD tool located above the motor, and transmitted by this tool to the surface via mud pulse signals. The system is particularly useful for accurate control over the drilling of extended reach and horizontally drilled wells.
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