Mud pulse telemetry

摘要

Mud pulse telemetry. The various embodiments are directed to methods and systems of encoding data in a mud pulse telemetry system, where at least a portion of the data is encoded the time between pressure transitions. Moreover, the various embodiments are directed to detection methods and systems that detect the pressure transitions at the surface.

主权项

1. A non-transitory computer-readable storage medium storing a program that, when executed by a processor, causes the processor to:
read values indicative of pressure within a pipe that has drilling fluid flowing therein, the drilling fluid carries pressure pulses that encode data; detect, in the values indicative of pressure, pressure transitions associated with the pressure pulses by causing the processor to:
calculate a running average time series comprising a plurality of datums, each datum being an average of a subset of the values indicative of pressure;create a filtered pressure time series from the values indicative of pressure;detect negative pressure transitions in the filtered pressure time series that correspond in time to the running average time series reaching a first predetermined value and the running average time series having a first slope; anddetect positive pressure transitions in the filtered pressure time series that correspond in time to the running average time series reaching a second predetermined value and the running average time series having a second slope; and determine from an amount of time between pressure transitions at least a portion of the data encoded in the pressure pulses.