CA2612698A1 - Method and apparatus for acoustic data transmission in a subterranean well - Google Patents
Method and apparatus for acoustic data transmission in a subterranean well Download PDFInfo
- Publication number
- CA2612698A1 CA2612698A1 CA002612698A CA2612698A CA2612698A1 CA 2612698 A1 CA2612698 A1 CA 2612698A1 CA 002612698 A CA002612698 A CA 002612698A CA 2612698 A CA2612698 A CA 2612698A CA 2612698 A1 CA2612698 A1 CA 2612698A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- acoustic
- noise
- sensor
- receiver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
- E21B47/16—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves through the drill string or casing, e.g. by torsional acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
- G01V11/002—Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geophysics (AREA)
- Acoustics & Sound (AREA)
- Mining & Mineral Resources (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Noise Elimination (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The disclosure describes a method and apparatus for effectively communicating data along an acoustic transmission path. The method comprises driving an acoustic transmitter to send a data signal along the acoustic transmission path, where the signal is distorted by ambient noise. The distorted signal is input to a spaced apart plurality of sensors so that consequent time-delayed signals provide reinforcement of the basic signal and attenuation of the ambient noise component when combined.
Claims (20)
1. A method of data transmission in an oil well environment, the method comprising the steps of:
providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel;
sending an acoustic signal from the transmitter at one or more chosen frequencies, along the acoustic channel, where it is joined by ambient noise traveling along the acoustic channel;
providing a plurality of spaced apart sensors at the receiver, the sensors provided along the length of the acoustic channel at a first and at least one subsequent location;
sensing the acoustic signal and ambient noise at the plurality of sensors, the sensors providing corresponding electrical output signals; and combining the sensor output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signal.
providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel;
sending an acoustic signal from the transmitter at one or more chosen frequencies, along the acoustic channel, where it is joined by ambient noise traveling along the acoustic channel;
providing a plurality of spaced apart sensors at the receiver, the sensors provided along the length of the acoustic channel at a first and at least one subsequent location;
sensing the acoustic signal and ambient noise at the plurality of sensors, the sensors providing corresponding electrical output signals; and combining the sensor output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signal.
2. The method according to claim 1, wherein the acoustic transmission path is an oilfield metallic tubular.
3. The method according to claim 1, wherein the plurality of sensors comprises at least three spaced apart sensors.
4. The method of Claim 3 wherein the acoustic signal is transmitted at one or more selected frequencies and the plurality of sensors are spaced apart a distance greater than one tenth of a wavelength of the transmitted signal.
5. The method according to claim 1, wherein the acoustic signal is transmitted at one or more selected frequencies as a primary signal and a plurality of time-delayed replicas thereof.
6. The method of Claim 1 wherein combining of the sensor output signals includes multiplication of the signals.
7. The method according to Claim 1, wherein the acoustic signal is transmitted at a selected frequency and further comprising the steps of:
placing a noise-reference sensor at a location near the receiver;
sensing ambient noise in the acoustic channel at the noise-reference sensor, the noise-reference sensor providing a corresponding electrical signal;
weighting the electrical noise-reference signal;
combining the weighted electrical noise-reference signal with the measured sensor output.
placing a noise-reference sensor at a location near the receiver;
sensing ambient noise in the acoustic channel at the noise-reference sensor, the noise-reference sensor providing a corresponding electrical signal;
weighting the electrical noise-reference signal;
combining the weighted electrical noise-reference signal with the measured sensor output.
8. The method of claim 7 where the weights are reconfigurable and will adapt so that they maximize the acoustic signal while minimizing the acoustic noise.
9. A method of data transmission in an oil well environment, the method comprising the steps of:
providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel;
sending a plurality of transmitted signals from the transmitter, along the acoustic channel, where the transmitted signals are joined by ambient noise traveling along the acoustic channel;
providing at least one sensor at the receiver, the at least one sensor for sensing and creating a plurality of sensor signals corresponding to the plurality of transmitted signals;
sensing the transmitted signals and ambient noise at the sensor, the sensor providing corresponding electrical output signals; and combining the sensor output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signals.
providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel;
sending a plurality of transmitted signals from the transmitter, along the acoustic channel, where the transmitted signals are joined by ambient noise traveling along the acoustic channel;
providing at least one sensor at the receiver, the at least one sensor for sensing and creating a plurality of sensor signals corresponding to the plurality of transmitted signals;
sensing the transmitted signals and ambient noise at the sensor, the sensor providing corresponding electrical output signals; and combining the sensor output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signals.
10. The method of Claim 9 wherein the electrical output signals are weighted prior to combining.
11. The method of Claim 9 wherein the plurality of transmitted signals are weighted prior to sending them along the acoustic channel.
12. The method of Claim 10 wherein the plurality of transmitted signals are weighted prior to sending them along the acoustic channel.
13. The method of Claim 12 wherein the weights on the output signal or the weights on the transmitted signals are reconfigurable.
14. The method according to Claim 9, wherein the at least one sensor comprises a plurality of spaced apart sensors.
15. The method according to Claim 9, wherein the acoustic signal is transmitted at one or more selected frequencies and further comprising the steps of:
placing a noise-reference sensor proximate to the acoustic channel;
sensing ambient noise at the noise-reference sensor, the noise-reference sensor providing a corresponding electrical signal;
weighting the electrical noise-reference signal;
combining the weighted electrical noise-reference signal with the measured sensor output.
placing a noise-reference sensor proximate to the acoustic channel;
sensing ambient noise at the noise-reference sensor, the noise-reference sensor providing a corresponding electrical signal;
weighting the electrical noise-reference signal;
combining the weighted electrical noise-reference signal with the measured sensor output.
16. A method of data transmission in an oil well environment, the method comprising the steps of:
providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel;
sending an acoustic signal from the transmitter at one or more chosen frequencies, along the acoustic channel, where it is joined by ambient noise traveling along the acoustic channel;
providing at least one sensor at the receiver for sensing the transmitted signal and ambient noise in the channel, the sensor providing a corresponding electrical sensor output signal;
providing a noise-reference sensor for sensing the ambient noise in the channel, the noise-reference sensor providing a corresponding electrical noise-reference output signal; and combining the output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signal.
providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel;
sending an acoustic signal from the transmitter at one or more chosen frequencies, along the acoustic channel, where it is joined by ambient noise traveling along the acoustic channel;
providing at least one sensor at the receiver for sensing the transmitted signal and ambient noise in the channel, the sensor providing a corresponding electrical sensor output signal;
providing a noise-reference sensor for sensing the ambient noise in the channel, the noise-reference sensor providing a corresponding electrical noise-reference output signal; and combining the output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signal.
17. The method of claim 16 where the signal from the noise reference sensor is weighted.
18. The method of claim 17 wherein the weight applied to the noise reference sensor is reconfigurable.
19. The method of Claim 16, further comprising providing a plurality of spaced apart sensors at the receiver, the sensors provided along the length of the acoustic channel at a first and at least one subsequent location;
sensing the transmitted signal and ambient noise at the plurality of sensors, the sensors providing corresponding electrical output signals; and combining the sensor output signals and noise-reference output signal to provide a receiver signal.
sensing the transmitted signal and ambient noise at the plurality of sensors, the sensors providing corresponding electrical output signals; and combining the sensor output signals and noise-reference output signal to provide a receiver signal.
20. The method of Claim 16, further comprising sending a plurality of transmitted signals from the transmitter, along the acoustic channel, where the transmitted signals are joined by ambient noise traveling along the acoustic channel;
providing a plurality of spaced apart sensors at the receiver, the plurality of sensors corresponding to the plurality of transmitted signals and spaced along the length of the acoustic channel such that the transmitted signals arrive simultaneously at corresponding sensors;
sensing the transmitted signals and ambient noise at the plurality of sensors, the sensors providing corresponding electrical output signals; and combining the sensor output signals and noise-reference output signal to provide a receiver signal.
providing a plurality of spaced apart sensors at the receiver, the plurality of sensors corresponding to the plurality of transmitted signals and spaced along the length of the acoustic channel such that the transmitted signals arrive simultaneously at corresponding sensors;
sensing the transmitted signals and ambient noise at the plurality of sensors, the sensors providing corresponding electrical output signals; and combining the sensor output signals and noise-reference output signal to provide a receiver signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2729349A CA2729349C (en) | 2006-12-04 | 2007-11-28 | Method and apparatus for acoustic data transmission in a subterranean well |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/633,264 | 2006-12-04 | ||
| US11/633,264 US7508734B2 (en) | 2006-12-04 | 2006-12-04 | Method and apparatus for acoustic data transmission in a subterranean well |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2729349A Division CA2729349C (en) | 2006-12-04 | 2007-11-28 | Method and apparatus for acoustic data transmission in a subterranean well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2612698A1 true CA2612698A1 (en) | 2008-06-04 |
| CA2612698C CA2612698C (en) | 2011-04-19 |
Family
ID=39183207
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2612698A Expired - Fee Related CA2612698C (en) | 2006-12-04 | 2007-11-28 | Method and apparatus for acoustic data transmission in a subterranean well |
| CA2838115A Expired - Fee Related CA2838115C (en) | 2006-12-04 | 2007-11-28 | Method and apparatus for acoustic data transmission in a subterranean well |
| CA2729349A Expired - Fee Related CA2729349C (en) | 2006-12-04 | 2007-11-28 | Method and apparatus for acoustic data transmission in a subterranean well |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2838115A Expired - Fee Related CA2838115C (en) | 2006-12-04 | 2007-11-28 | Method and apparatus for acoustic data transmission in a subterranean well |
| CA2729349A Expired - Fee Related CA2729349C (en) | 2006-12-04 | 2007-11-28 | Method and apparatus for acoustic data transmission in a subterranean well |
Country Status (8)
| Country | Link |
|---|---|
| US (3) | US7508734B2 (en) |
| EP (1) | EP1930542A3 (en) |
| AR (2) | AR064033A1 (en) |
| BR (2) | BR122018014065B1 (en) |
| CA (3) | CA2612698C (en) |
| MX (1) | MX2007015250A (en) |
| MY (1) | MY145502A (en) |
| NO (2) | NO343081B1 (en) |
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| WO2014035914A1 (en) * | 2012-08-29 | 2014-03-06 | Schlumberger Canada Limited | System and method for downhole signal enhancement |
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-
2006
- 2006-12-04 US US11/633,264 patent/US7508734B2/en active Active
-
2007
- 2007-11-28 CA CA2612698A patent/CA2612698C/en not_active Expired - Fee Related
- 2007-11-28 EP EP07254601.3A patent/EP1930542A3/en not_active Withdrawn
- 2007-11-28 CA CA2838115A patent/CA2838115C/en not_active Expired - Fee Related
- 2007-11-28 CA CA2729349A patent/CA2729349C/en not_active Expired - Fee Related
- 2007-11-29 AR ARP070105309A patent/AR064033A1/en active IP Right Grant
- 2007-11-29 NO NO20076166A patent/NO343081B1/en unknown
- 2007-11-30 MY MYPI20072144A patent/MY145502A/en unknown
- 2007-12-03 MX MX2007015250A patent/MX2007015250A/en active IP Right Grant
- 2007-12-04 BR BR122018014065-8A patent/BR122018014065B1/en active IP Right Grant
- 2007-12-04 BR BRPI0705503A patent/BRPI0705503B8/en active IP Right Grant
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2008
- 2008-12-03 US US12/256,352 patent/US8472282B2/en active Active
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2011
- 2011-02-16 US US13/028,733 patent/US9030913B2/en active Active
-
2014
- 2014-05-05 AR ARP140101824A patent/AR096177A2/en active IP Right Grant
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2018
- 2018-05-02 NO NO20180630A patent/NO344541B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| MY145502A (en) | 2012-02-29 |
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