Pulse generation for downhole logging
AssigneeHalliburton Energy Services, Inc.
InventorsPeng Li, Batakrishna Mandal, Boguslaw Wiecek, Zheng Chen
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Abstract
An example method includes determining a frequency response of a tuned pulse to be transmitted from a transmission element. A matching frequency envelope corresponding to a frequency envelope of the frequency response may be determined. A time domain signal corresponding to the matching frequency envelope may be determined. A series of digital pulses corresponding to the time domain signal may be determined. An analog output at a switching amplifier corresponding to the series of digital pulses may be generated. A transmission element may be excited with the analog output.
Claims20
A method, comprising:
- determining a frequency response of a tuned pulse to be transmitted from a transmission element;
- determining a matching frequency envelope corresponding to a frequency envelope of the frequency response;
- determining a time domain signal corresponding to the matching frequency envelope;
- determining a series of digital pulses corresponding to the time domain signal;
- generating an analog output at a switching amplifier corresponding to the series of digital pulses;
- and
- exciting the transmission element with the analog output.
A downhole tool, comprising:
- a transmission element;
- a filter coupled to the transmission element;
- a switching amplifier coupled to the filter;
- and
- a digital control system coupled to the switching amplifier, wherein the digital control system is configured to
- determine a frequency response of a tuned pulse to be transmitted from the transmission element;
- determine a matching frequency envelope corresponding to a frequency envelope of the frequency response;
- determine a time domain signal corresponding to the matching frequency envelope;
- determine a series of digital pulses corresponding to the time domain signal;
- generate an analog output at the switching amplifier corresponding to the series of digital pulses;
- and
- excite the transmission element with the analog output.
Dependencies are inferred from the claim text.