| US 7,348,894 B2 | ||
| Method and apparatus for using a data telemetry system over multi-conductor wirelines | ||
| Jeffrey R. Bailey, Houston, Tex. (US); and Marion M. Ringo, League City, Tex. (US) | ||
| Assigned to Exxon Mobil Upstream Research Company, Houston, Tex. (US) | ||
| Filed on Jul. 21, 2005, as Appl. No. 11/186,523. | ||
| Application 11/186523 is a continuation in part of application No. 10/073799, filed on Feb. 11, 2002, granted, now 7,026,951. | ||
| Claims priority of provisional application 60/305313, filed on Jul. 13, 2001. | ||
| Prior Publication US 2005/0270172 A1, Dec. 08, 2005 | ||
| Int. Cl. G01V 3/00 (2006.01) | ||
| U.S. Cl. 340—854.3 [367/101; 367/135; 702/14] | 19 Claims |
| 1. A method for improved telemetry of a data signal from a first location to a second location using a wireline having at
least three conductors, comprising:
(a) connecting one end of said wireline to a data transmittal means at said first location and the other end of said wireline
to a data receiver means at said second location, said data transmittal means having first and second output terminals, said
data receiver means having first and second input terminals, wherein
(1) at least two of said conductors are connected to said first output terminal of said data transmittal means and to said
first input terminal of said data receiver means, and
(2) at least one of said conductors is connected to said second output terminal of said data transmittal means and to said
second input terminal of said data receiver means;
(b) generating said data signal at said first location;
(c) forming a plurality of frequency modulated channel signals from said data signal that are each associated with a specific
frequency band in a frequency range, the frequency range including frequencies from a low frequency band to a high frequency
band and the high frequency band is below a harmonic of said low frequency band that interferes with said high frequency band;
(d) summing the plurality of frequency modulated channel signals into a composite modulated data signal;
(e) transmitting said composite modulated data signal from said data transmittal means through said wireline to said data
receiver means; and
(f) receiving said composite modulated data signal at said second location.
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