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US 2021/0381367 A1Published application
Integrated downhole system with plural telemetry subsystems
AssigneeEvolution Engineering Inc.
InventorsAaron W. LOGAN, David A. SWITZER, Jili LIU, Justin C. LOGAN, Mingdong XU
Life of this patent
Estimating the term…
Abstract
A downhole system has a plurality of telemetry systems and a control system configured to obtain information from one or more sensors and transmit that information on one or more of the plurality of telemetry systems. The configuration of a controller may be changed so as to change which information is transmitted on a given telemetry system and how the information is to be transmitted on the given telemetry system.
Claims15
(canceled)
A drilling method comprising:
- advancing a drill string while pumping drilling fluid through a bore of the drill string during active drilling periods separated by flow-off periods during which the flow of drilling fluid through the drill string is discontinued;
- and
- communicating telemetry data from a downhole system to surface equipment using one or both of EM telemetry and MP telemetry;
- wherein the method comprises, at the downhole system:
- transmitting telemetry data by EM telemetry;
- monitoring an electrical output current of an EM telemetry transmitter;
- and
- if the electrical output current meets or exceeds a predetermined threshold, automatically switching to transmit the telemetry data by MP telemetry.
5 more elements
Dependencies are inferred from the claim text.