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US 11,649,720 B2Granted
Integrated downhole system with plural telemetry subsystems
OwnerAaron W. Logan, David A. Switzer +3inventors
InventorsAaron W. Logan, David A. Switzer, Jili Liu, Justin C. Logan, Mingdong Xu
Life of this patent
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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.
Claims21
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 a flow of the drilling fluid through the drill string is discontinued;
- communicating telemetry data from a downhole system to surface equipment by one or more of an electromagnetic (EM) telemetry system and a mud pulse (MP) telemetry system;
- and
- detecting an onset of one of the flow-off periods and in response to said detecting the onset of the one of the flow-off periods reducing delivery of electrical power to the MP telemetry system.
1 more element
Dependencies are inferred from the claim text.