Apparatus for transmitting well bore data

Details Apparatus for transmitting well bore data Apparatus for transmitting well bore data

1974-05-15

1976-04-06

Wilbur, Maynard R.

Communications: electrical

Selective

Interrogation response

340 18NC, G01V 140

Patent

active

039493547

ABSTRACT:
In the representative embodiments of the present invention described herein, a drilling mud is circulated through a drill string at a sufficient rate to effectively operate an impeller-driven electrical generator arranged on a tool coupled in the drill string for supplying power to downhole electrical circuits and one or more downhole condition-measuring devices on the tool. By selectively controlling the flow of drilling mud past the impeller in accordance with the conditions being monitored by the condition-measuring devices, data-encoded acoustic signals are produced in the circulating fluid and transmitted to the surface for detecting and decoding as power is simultaneously supplied to the downhole system by the generator.

REFERENCES:
patent: 2958821 (1960-11-01), Webb
patent: 3770006 (1973-11-01), Sexton et al.
patent: 3792429 (1974-02-01), Patton et al.
patent: 3863203 (1975-01-01), Patton et al.

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