Method for drilling a borehole from one cased borehole to anothe

Details Method for drilling a borehole from one cased borehole to anothe Method for drilling a borehole from one cased borehole to anothe

1995-01-05

1996-07-30

O'Shea, Sandra L.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

By magnetic means

175 45, G01V 308, E21B 2516

Patent

active

055415172

ABSTRACT:
In a method for drilling adjacent to a cased known first borehole a second borehole in a predetermined direction the following steps are carried out for a number of along hole depths d.sub.i :

REFERENCES:
patent: 3725777 (1973-04-01), Robinson et al.
patent: 4163324 (1979-08-01), Russell et al.
patent: 4640352 (1987-02-01), Vanmeurs et al.
patent: 4700142 (1987-10-01), Kuckes
patent: 5103177 (1992-04-01), Russell et al.
patent: 5172480 (1992-12-01), Labuc et al.
patent: 5230387 (1993-07-01), Waters et al.
Foreign Search Report dated Apr. 3, 1995.

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