Cement data telemetry via drill string
AssigneeSchlumberger Technology Corporation
InventorJean-Marie Degrange
Life of this patent
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Abstract
A method can include acquiring data via a receiver mounted in a drill string during tripping of the drill string downward into a wellbore (e.g., including a casing and a cement annulus about the casing) where the acquired data can be for evaluation of at least one characteristic of cement; buffering at least a portion of the acquired data to a memory device mounted in the drill string; and while pumping drilling fluid through a passage in the drill string, as disposed in the wellbore, transmitting at least a portion of the buffered data via mud-pulse telemetry.
Claims14
A method comprising:
- acquiring data via a receiver mounted in a drill string during tripping of the drill string downward into a wellbore that comprises a casing and a cement annulus about the casing, the acquired data for evaluation of at least one characteristic of cement;
- buffering at least a portion of the acquired data to a memory device mounted in the drill string;
- commencing pumping of drilling fluid through a passage in the drill string after passing a casing shoe of the casing;
- receiving a downlink command while pumping the drilling fluid through the passage in the drill string wherein the downlink command calls for acquiring data during tripping of the drill string upward in the wellbore;
- while pumping the drilling fluid through the passage in the drill string, as disposed in the wellbore, transmitting at least a portion of the buffered data via mud-pulse telemetry;
- using one or more compression algorithms implemented by compression circuitry in the drill string;
- and compressing the acquired data, compressing the buffered data or compressing the acquired data and the buffered data.
A downhole tool mountable in a drill string, the downhole tool comprising:
- one or more processors;
- a memory device with memory accessible by at least one of the one or more processors;
- and
- processor-executable instructions stored in the memory of the memory device and executable by at least one of the one or more processors to acquire data via a receiver mounted in a drill string during tripping of the drill string downward into a wellbore that comprises a casing and a cement annulus about the casing, the acquired data for evaluation of at least one characteristic of cement;
- buffer at least a portion of the acquired data to the memory device mounted in the drill string;
- commence pumping of drilling fluid through a passage in the drill string after passing a casing shoe of the casing;
- receive a downlink command and to initiate transmission of at least a portion of the buffered data via the mud-pulse telemetry responsive to the received downlink command;
- while pumping the drilling fluid through the passage in the drill string, as disposed in the wellbore, transmit at least a portion of the buffered data via the mud-pulse telemetry;
- and
- implement one or more compression algorithms to compress the acquired data, the buffered data or the acquired data and the buffered data.
One or more non-transitory computer-readable storage media comprising computer-executable instructions to instruct a computing device to:
- program one or more data acquisition periods for data acquisition equipment of a drill string during a downward leg of a trip of the drill string into a wellbore, the acquired data for evaluation of at least one characteristic of cement, for storage in the drill string, and for transmission by mud-pulse telemetry during pumping of drilling fluid through a passage of the drill string with the drill string disposed in the wellbore after the drill string reaches a position past a casing shoe of a casing of the wellbore;
- program one or more compression algorithms to compress the acquired data;
- evaluate at least a portion of the acquired data as received via the mud-pulse telemetry;
- and
- based at least in part on the evaluation, program one or more subsequent data acquisition periods for the data acquisition equipment or other data acquisition to be tripped in the wellbore, wherein the one or more subsequent data acquisition periods for the data acquisition equipment comprise one or more data acquisition periods for an upward leg of the trip of the drill string.
Dependencies are inferred from the claim text.