US 11,655,708 B2
Telemetry using pulse shape modulation
Li Gao, Katy, TX (US); Ravi P. Nanayakkara, Kingwood, TX (US); Joni Polili Lie, Spring, TX (US); and Mukul M. Agnihotri, Spring, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Sep. 29, 2020, as Appl. No. 17/37,362.
Prior Publication US 2022/0098978 A1, Mar. 31, 2022
Int. Cl. E21B 47/20 (2012.01); E21B 34/08 (2006.01)
CPC E21B 47/20 (2020.05) [E21B 34/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A downhole telemetry method comprising:
receiving a data stream;
dividing the data stream into a first sub-stream and a second sub-stream by demultiplexing the data stream in an interleaved manner based on relative data density capacity of a pulse shape modulation and a pulse position modulation, wherein the first sub-stream is modulated using the pulse shape modulation and the second sub-stream is modulated using the pulse position modulation, and wherein the first sub-stream is modulated at least partially in parallel to the modulation of the second sub stream; and
driving a pulser device based on the data stream, wherein driving the pulser device includes generating modulated pressure pulses including pulse position modulating pressure pulses and pulse shape modulation pressure pulses within a fluid telemetry medium.