Integrated downhole system with plural telemetry subsystems

摘要

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.

主权项

1. A downhole system comprising:
a plurality of telemetry subsystems, a control system comprising a plurality of telemetry controllers, each telemetry controller of the plurality of telemetry controllers associated and in communication with at least one telemetry subsystem of the plurality of telemetry subsystems, a bus, said each telemetry controller of the plurality of telemetry controllers being in communication with said each different other telemetry controller of the plurality of telemetry controllers via the bus, and one or more sensors in communication with the plurality of telemetry controllers, wherein: a first telemetry controller of the plurality of telemetry controllers is associated with a first telemetry subsystem of the plurality of telemetry subsystems and is operable to obtain first sensor information from a first set of the one or more sensors and to transmit the first sensor information on the first telemetry subsystem; and a second telemetry controller of the plurality of telemetry controllers is associated with a second telemetry subsystem of the plurality of telemetry subsystems and is operable independently of the first telemetry controller to obtain second sensor information from a second set of the one or more sensors and to transmit the second sensor information on the second telemetry subsystem; wherein the control system is configured to provide a transmission in a splitting mode, wherein the control system is operable to obtain an entire data unit for the transmission, transmit a first part of the entire data unit using the first telemetry subsystem of the plurality of telemetry subsystems and transmit a second part of the entire data unit using the second telemetry subsystem of the plurality of telemetry subsystems; wherein the transmission of the entire data unit in the splitting mode is completed in less time than would be required to transmit the entire data unit using either the first telemetry subsystem or the second telemetry subsystem alone; wherein the entire data unit has a higher-resolution version and a lower resolution version and, the control system is configured to transmit the higher-resolution version of the entire data unit on the first or the second telemetry subsystems if a data rate of the first or the second telemetry subsystems exceeds a first threshold; switch to the transmission in the splitting mode and transmit the higher-resolution version of the entire data unit using both the first and the second telemetry subsystems if the data rate of the first or the second telemetry subsystems falls below the first threshold and a combined data rate of the first and the second telemetry subsystems exceeds a second threshold; and transmit the lower-resolution version of the entire data unit if the combined data rate of the first and the second telemetry subsystems is below the second threshold.