Methods and apparatus for reducing interfering effects in measur

Details Methods and apparatus for reducing interfering effects in measur Methods and apparatus for reducing interfering effects in measur

1986-06-25

1987-09-08

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

175 40, G01V 140

Patent

active

046929118

ABSTRACT:
Apparatus and methods of making measurements in a borehole while drilling by using a fluid circulation system having interfering pressure variations including the steps of measuring selected parameters at various depths in the borehole and generating in pressure changes indicative of the values of the measured parameters, producing signals representing a superposition of the generated pressure changes and the interfering pressure variations and utilizing the recurrence of the interfering pressure variations for deriving from the first signals resultant signals representing substantially the information carrying pressure changes.

REFERENCES:
patent: 3302457 (1967-02-01), Mayes
patent: 3488629 (1970-01-01), Claycomb
patent: 3555504 (1971-01-01), Fields
patent: 3716830 (1973-02-01), Garcia
patent: 3742443 (1973-06-01), Foster et al.
patent: 4262343 (1981-04-01), Claycomb

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