Drill string telemetry system

Details Drill string telemetry system Drill string telemetry system

2005-09-06

2005-09-06

Horabik, Michael (Department: 2635)

Communications: electrical

Wellbore telemetering or control

Pulse or digital signal transmission

C340S855400, C367S082000

Reexamination Certificate

active

06940420

ABSTRACT:
A drill string telemetry system comprises an acoustic reflector mounted to the surface end of the drill string. The reflector is adapted to reflect surface-generated torsional acoustic noise away from the drill string. The reflector attenuates the power of 500 Hz torsional acoustic noise power impinging on the reflector by a factor of at least 2.

REFERENCES:
patent: 4066995 (1978-01-01), Matthews
patent: 5128901 (1992-07-01), Drumheller
patent: 5274606 (1993-12-01), Drumheller et al.
patent: 0 900 918 (1998-07-01), None
patent: 2 327 957 (1997-08-01), None
patent: 2 357 527 (1999-12-01), None
Drumheller et al The propagation of sound waves in drill strings J. Acoust. Soc., vol. 97 (4), Apr. 1995, pp. 2116-2125.

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