| CPC E21B 47/125 (2020.05) [E21B 47/18 (2013.01)] | 20 Claims |
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1. A system comprising:
at least one sensor positionable at a bottom hole assembly within a wellbore to detect flow of drilling fluid, a rotation of the bottom hole assembly, or a combination thereof;
a rotary steerable system positionable within the wellbore to steer a drill bit;
a processing device positionable to communicatively couple to the at least one sensor and the rotary steerable system; and
a memory device comprising instructions that are executable by the processing device for causing the processing device to:
receive sensor signals from the at least one sensor at the bottom hole assembly within the wellbore;
identify at least two downlink signal triggers from the sensor signals, the at least two downlink signal triggers comprising an edge detection of a change in a magnitude of the flow of drilling fluid, wherein a first downlink signal trigger of the at least two downlink signal triggers comprises a first drilling parameter threshold, wherein a second downlink signal trigger of the at least two downlink signal triggers comprises a second drilling parameter threshold that is the same as the first drilling parameter threshold, wherein the sensor signal comprises a downlink signal that comprises a plurality of concatenated commands, wherein each concatenated command of the plurality of concatenated commands has a length that is based at least in part on a command delay, a code length, and a command value;
decode the downlink signal detected between each of the at least two downlink signal triggers; and
control the rotary steerable system to steer the drill bit using the decoded downlink signal.
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