Electricity: measuring and testing – Of geophysical surface or subsurface in situ – By magnetic means
Patent
1993-10-08
1996-01-16
Snow, Walter E.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
By magnetic means
175 45, G01V 308, G01V 326
Patent
active
054850894
ABSTRACT:
Methods for determining the distance from a borehole to a nearby, substantially parallel target well for use in guiding the drilling of the borehole, including positioning a magnetic field sensor in the borehole at a known depth and providing a magnetic field source in the target well. The wells may be vertical or horizontal, and the source preferably is a solenoid movable in the target to a location at approximately the same depth as that of the sensor.
The distance between the borehole and the solenoid is determined, in one embodiment, by moving the solenoid to depths above and below the depth of the sensor, and detecting maximum field vectors. The distance the solenoid moves between the maxima is the distance between the wells. In another embodiment, the ratio of solenoid magnetic field vectors is used to determine the ratio of the difference in depth z between the solenoid and the sensor to the lateral distance R between the wells. This ratio z/r is then used to determine the separation of the wells.
REFERENCES:
patent: 2183565 (1939-12-01), Hawley
patent: 2521745 (1950-09-01), Pope
patent: 3285350 (1966-10-01), Henderson
patent: 3350634 (1967-10-01), Hoehn, Jr.
patent: 3406766 (1968-10-01), Henderson
patent: 3731752 (1973-05-01), Schad
patent: 3745446 (1973-07-01), Norris
patent: 3853185 (1974-12-01), Dahl et al.
patent: 4072200 (1978-02-01), Morris et al.
patent: 4323848 (1982-04-01), Kuckes
patent: 4372398 (1983-02-01), Kuckes
patent: 4443762 (1984-04-01), Kuckes
patent: 4458767 (1984-07-01), Hoehn, Jr.
patent: 4465140 (1984-08-01), Hoehn, Jr.
patent: 4529939 (1985-07-01), Kuckes
patent: 4593770 (1986-07-01), Hoehn, Jr.
patent: 4700142 (1987-10-01), Kuckes
patent: 4710708 (1987-12-01), Rorden et al.
patent: 4791373 (1988-12-01), Kuckes
patent: 5151658 (1992-09-01), Muramatsu et al.
Snow Walter E.
Vector Magnetics Inc.
LandOfFree
Method and apparatus for measuring distance and direction by mov does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring distance and direction by mov, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring distance and direction by mov will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-311956