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US 10,378,342 B2Granted
Mud pulse telemetry using gray coding
AssigneeHalliburton Energy Services, Inc.
InventorEhud Barak
Life of this patent
Estimating the term…
Abstract
A system can include a well tool operable to transmit a fluid through an interior of the well tool. The system can also include a transmitter coupled to the well tool. The transmitter can select a parameter of a pressure waveform using a Gray code that corresponds to the parameter and generate the pressure waveform in the fluid.
Claims24
A system comprising:
- a well tool operable to transmit a fluid through an interior of the well tool;
- and
- a transmitter coupled to the well tool and operable to:
- determine a value to transmit;
- determine a Gray code representing the value;
- select a transmission waveform corresponding to the Gray code using a predefined lookup table, wherein the predefined lookup table includes relationships between (i) a plurality of Gray code values and (ii) a plurality of different transmission waveforms for pressure waves;
- and
- generate a pressure wave having the transmission waveform in the fluid.
5 more elements
A method comprising:
- determining, by a transmitter, a value to transmit;
- determining, by the transmitter, a Gray code representing the value;
- selecting, by the transmitter, a transmission waveform corresponding to the Gray code using a predefined lookup table, wherein the predefined lookup table includes relationships between (i) a plurality of Gray code values and (ii) a plurality of different transmission waveforms for pressure waves;
- and
- generating, by the transmitter, a pressure wave having the transmission waveform by modulating a pressure of a fluid in a well tool.
2 more elements
A telemetry transmitter comprising:
- a processor;
- and
- a memory in which instructions executable by the processor are stored for causing the processor to:
- determine a Gray code;
- select a transmission waveform corresponding to the Gray code using a predefined lookup table, wherein the predefined lookup table includes relationships between (i) a plurality of Gray code values and (ii) a plurality of different transmission waveforms for pressure waves;
- and
- operate a valve to generate a pressure wave having the transmission waveform in a fluid in a well tool.
4 more elements
Dependencies are inferred from the claim text.