Collaborative telemetry

Patent metadata

Field	Value
Publication number	US-10070205-B2
Application number	US-201715667428-A
Country	US
Kind code	B2
Filing date	Aug 2, 2017
Priority date	Jan 30, 2015
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A method may include providing one or more telemetry transmission systems, the one or more transmission systems comprising one or more receivers and one or more transmitters. The method may also include transmitting a first synchronization sequence from the one or more telemetry transmission systems, the first synchronization sequence transmitted in a first channel, and the first synchronization sequence being at least a portion of a first telemetry signal. In addition, the method may include transmitting a second synchronization sequence the one or more telemetry transmission systems, the second synchronization sequence transmitted in a second channel, and the second synchronization sequence being at least a portion of a second telemetry signal. The first and second synchronization sequences may be transmitted simultaneously or at a predetermined time difference. The method may include receiving the first synchronization sequence at the one or more receivers, and receiving the second synchronization sequence at the one or more receivers.

First claim

The invention claimed is:

1. A method comprising:
providing one or more telemetry transmission systems, the one or more transmission systems comprising one or more receivers and one or more transmitters;
providing a controller, the controller in data connection with each of the one or more telemetry transmission systems, wherein the controller includes a receiving system, the receiving system adapted to receive telemetry signals from the first channel and the second channel simultaneously;
transmitting a first telemetry signal from the one or more telemetry transmission systems, the first telemetry signal including a first synchronization sequence and a first data sequence, the first telemetry signal transmitted in a first channel;
transmitting a second telemetry signal from the one or more telemetry transmission systems, the second telemetry signal transmitted in a second channel, the second telemetry signal including a second data sequence, wherein the first telemetry signal is transmitted at a first time and the second telemetry signal is transmitted at a second time;
receiving the first telemetry signal at the one or more receivers; and
receiving the second telemetry signal at the one or more receivers.

2. The method of claim 1 further comprising:
generating high priority alert data.

3. The method of claim 2 further comprising transmitting the high priority alert data on the first channel in the first data sequence and the second channel in the second data sequence.

4. The method of claim 2 further comprising:
determining a predicted probability of bit error (Pb) for the first channel and the second channel;
determining whether the predicted Pb of first channel and the predicted Pb of the second channel meet a predetermined lower threshold;
transmitting the high priority alert data on the first channel if the predicted Pb of the first channel meets the predetermined lower threshold, the second channel if the predicted Pb of the second channel meets the predetermined lower threshold, or both the first and second channels if the predicted Pb of the first channel and the second channel are above the predetermined lower threshold.

5. The method of claim 1 further comprising:
determining a predicted probability of bit error (Pb) for the first channel;
determining whether the predicted Pb of the first channel meets a predetermined lower threshold; and
increasing a data sequence transmission rate on the first channel for the first data sequence that would increase the predicted Pb to a predetermined maximum level; or
determining a raw data transmission rate that would maximize the data sequence transmission rate for the first channel for the first data sequence and increasing the data sequence transmission rate on the first channel for the first data sequence to the determined raw data transmission rate.

6. The method of claim 5 further comprising:
determining a predicted probability of bit error (Pb) for the second channel;
determining whether the predicted Pb of the second channel meets a predetermined lower threshold; and
increasing a data sequence transmission rate on the second channel for the second data sequence that would increase the predicted Pb to a predetermined maximum level; or
determining a raw data transmission rate that would maximize the data sequence transmission rate for the second channel for the second data sequence and increasing the data sequence transmission rate on the second channel for the second data sequence to the determined raw data transmission rate.

7. The method of claim 1 further comprising:
determining a predicted probability of bit error (Pb) for the first channel;
determining a pre-determined upper Pb threshold for the first channel;
determining whether predicted Pb for the first channel is below the pre-determined upper Pb threshold for the first channel; and
reducing a transmit power of the telemetry transmission system for the first channel if the predicted Pb for the first channel is below the pre-determined upper Pb threshold for the first channel.

8. The method of claim 7 further comprising:
determining a predicted probability of bit error (Pb) for the second channel;
determining a pre-determined upper Pb threshold for the second channel;
determining whether predicted Pb for the second channel is below the pre-determined upper Pb threshold for the second channel; and
reducing a transmit power of the telemetry transmission system for the second channel if the predicted Pb for the second channel is below the pre-determined upper Pb threshold for the second channel.

9. The method of claim 1 further comprising:
determining a predicted probability of bit error (Pb) for the first channel;
determining a pre-determined lower Pb threshold for the first channel;
predicting whether increasing transmit power, duty cycle, a change of encoding method, or a combination thereof will increase the predicted Pb of the first channel to the pre-determined lower Pb threshold of the first channel; and
turning off power to the transmitter for the first channel if the prediction is negative.

10. The method of claim 9 further comprising:
determining a predicted probability of bit error (Pb) for the second channel;
determining a pre-determined lower Pb threshold for the second channel;
predicting whether increasing transmit power, duty cycle, a change of encoding method, or a combination thereof will increase the predicted Pb of the second channel to the pre-determined lower Pb threshold of the second channel; and
turning off power to the transmitter for the second channel if the prediction is negative.

11. The method of claim 1 further comprising:
segregating data into a plurality of significant bit categories, the significant bit categories including a most significant bits category and a next most-significant bit category;
determining a predicted probability of bit error (Pb) for the first channel and a probability of bit error for the second channel; and
transmitting the most significant bits in the channel with the lowest predicted Pb and the next-most significant bits in the channel with the higher predicted Pb.

12. The method of claim 1 , wherein the first telemetry signal is a MP telemetry signal and the second telemetry signal is an EM telemetry signal, and wherein at least one of the one or more telemetry transmission systems includes a mud pump, the method further comprising:
generating a survey;
turning off the mud pump; and
transmitting the survey in the second channel when the mud pump is turned off.

13. The method of claim 12 , further comprising:
turning on the mud pump after transmitting the survey in the second channel; and
transmitting the survey in the first channel, wherein the survey is received using a weighted correlator.

14. The method of claim 12 , wherein the survey transmitted in the first channel but is not transmitted in the second channel.

15. The method of claim 12 , wherein the survey is transmitted in the second channel a plurality of times.

16. The method of claim 12 , wherein the survey is transmitted in the first channel a plurality of times.

17. The method of claim 1 , wherein the first telemetry signal is a MP telemetry signal and wherein at least one of the one or more telemetry transmission systems includes a mud pump, the method further comprising:
cancelling noise from the mud pump by using multiple transducers spaced apart in conjunction with spatial filtering or using a sensor on the mud pump to detect pump rate and correlating pump rate to

Assignees

• Scient Drilling Int Inc

Inventors

• White Matthew
• Whitacre Timothy
• Gleason Brian
• Youssef Mohamed

Classifications

• H04L7/0041

  Delay of data signal · CPC title

• H04B15/00

  Suppression or limitation of noise or interference (by means associated with receiver H04B1/10) · CPC title

• H04L7/041

  using special codes as synchronising signal · CPC title

• H04L7/04

  Speed or phase control by synchronisation signals {(H04L7/0075 takes precedence)} · CPC title

• E21B47/04

  Measuring depth or liquid level · CPC title