Measurement-while-drilling system and method

Details Measurement-while-drilling system and method Measurement-while-drilling system and method

1993-07-23

1996-12-10

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

367 85, 367148, 181105, 175 40, G01V 140, B21B 4712

Patent

active

055838278

ABSTRACT:
In a Measurement-While-Drilling system, selecting the fixed frequency in a pulse signal generator utilizes constructive interference to enhance the signal level in an amplitude modulated signal. The pulse generation system preferably includes a plurality of mud sirens in tandem to further enhance signal level and to provide multiple amplitude levels to increase data transmission rate.

REFERENCES:
patent: 3756076 (1973-09-01), Ouichaud et al.
patent: 3764969 (1973-10-01), Cubberly
patent: 3764970 (1973-10-01), Manning
patent: 4785300 (1988-11-01), Chin et al.
patent: 4847815 (1989-07-01), Malone
patent: 5073877 (1991-12-01), Jeter
patent: 5182731 (1993-01-01), Hoelscher et al.
patent: 5189645 (1993-02-01), Innes
patent: 5375098 (1994-12-01), Malone et al.
Improvements in MWD Telemetry: "The Right Data at the Right Time"; by B. A. Montaron, J-M.D. Hache, and Bernard Voisin; SPE 25356; Feb. 8-10, 1993; pp. 337-346.
"Innovative Advances in MWD"; by C. A. Martin, R. M. Philo, D. P. Decker, and T. M. Burgess; IADC/SPE 27516; Feb. 15-18, 1994; pp. 787-796.

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