Method and apparatus for determining alignment of borehole tools

Details Method and apparatus for determining alignment of borehole tools Method and apparatus for determining alignment of borehole tools

1995-05-16

1996-12-17

Lobo, Ian J.

Communications: electrical

Wellbore telemetering or control

With orientation sensing of subsurface telemetering equipment

3408546, G01V 100, G01V 140

Patent

active

055857906

ABSTRACT:
A method of determining alignment of first and second parts of a borehole tool system in which three mutually orthogonal signals are transmitted by a transmitter in the first tool part and each signal is received and measured in three mutually orthogonal directions at a receiver in the second tool part, the components of each signal in the three mutually orthogonal directions at the receiver being used to determine the alignment of the first and second parts. The method has applications in deep electromagnetic or acoustic measurements, either from a single well or in a cross-well system.

REFERENCES:
patent: 4710708 (1987-12-01), Rorden et al.
patent: 5042611 (1991-08-01), Howlett
patent: 5144590 (1992-09-01), Chon
patent: 5289433 (1994-02-01), Cowles et al.
patent: 5307072 (1994-04-01), Jones, Jr.
B. R. Spies, Survey Design Considerations for Cross-Well Electromagnetics, 1992 Annual SEG Meeting, New Orleans.

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