Method and apparatus for indicating the position of one well bor

Boring or penetrating the earth – With signaling – indicating – testing or measuring – Tool position direction or inclination measuring or...

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175 62, 340 18P, 175404, 181101, E21B 4712

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active

040169421

ABSTRACT:
A compression wave type signal of a selected frequency is transmitted into the ground at the bottom of a well bore being drilled. The signal is picked up by four microphones that are positioned in another well bore. The microphones have a known orientation with respect to the desired course of the well bore being drilled. The phase relationship of the transmitted signal picked up by the microphones is used to indicate at the surface the deviation between the course of the well being drilled and the desired course.

REFERENCES:
patent: 3160850 (1964-12-01), Dudley
patent: 3282355 (1966-11-01), Henderson
patent: 3285350 (1966-11-01), Henderson
patent: 3518840 (1970-07-01), Mertz
patent: 3544957 (1970-12-01), Smetanin
patent: 3722605 (1973-03-01), Isham
patent: 3817345 (1974-06-01), Bailey

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