Systems and Methods of Communication Signal Processing For Downhole Applications
AssigneeAlkhorayef Petroleum Company
InventorsJedrzej Pietryka, Janusz Szewczyk, Zbigniew Krzeminski, Tomasz Orlowski
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Abstract
A data communications system and associated method of high speed data communication for transferring data over a three phase power system are provided. Transmission of information is performed using either sequential or simultaneous multiple frequency transmissions. The frequencies are transmitted such that a combination of either simultaneous multiple frequencies or a pattern of frequency transmissions represents the transmitted data. Digital signal processing including time and frequency domain techniques are used to decode the transmitted data.
Claims20
A method of communicating data over a three phase power system between downhole equipment and a surface, the method comprising:
- transmitting data words between the downhole equipment and the surface using n distinct frequencies, n being greater than 1, wherein the transmission of a data word includes transmitting a signal comprising the n frequencies ordered in a unique sequence in time, the unique sequence of frequencies being representative of the data word.
A method of communicating data over a three phase power system between downhole equipment and a surface, the method comprising:
- transmitting bits of data between the downhole equipment and the surface, wherein the transmission of a bit of data includes transmitting multiple frequencies simultaneously on a transmission line, and wherein a unique combination of frequencies transmitted simultaneously is representative of the bit's value.
A method of communicating data over a three phase power system between downhole equipment and a surface, the method comprising:
- transmitting data words between the downhole equipment and the surface, wherein the transmission of a data word includes transmitting a unique sequence of frequency combinations, each frequency combination comprising multiple frequencies transmitted simultaneously on a transmission line, the unique sequence of frequency combinations being representative of the data word.
Dependencies are inferred from the claim text.