Geometrical instruments – Indicator of direction of force traversing natural media – Process
Patent
1973-09-12
1976-02-03
Martin, Jr., William D.
Geometrical instruments
Indicator of direction of force traversing natural media
Process
33312, E21B 47022
Patent
active
039356426
ABSTRACT:
For the directional drilling of boreholes, the orientation or roll angle of the drill head or mud-motor in the borehole has to be ascertained for steering purposes. The roll angle is determined, during drilling, by sensing at the location of the drilling tool in the borehole the values of the earth's magnetic field strength in two axes transverse to the main tool axis, signalling these values to the drilling station and translating them according to the direction and inclination of the borehole axis, which are known and normally updated at intervals between drilling runs. The down-hole assembly, located in a fixed attitude to the mud-motor, requires only static magnetic sensors. A resolver in a surface indicating unit provides for the indication of the roll angle as the angle determined by the sensors, translated according to the borehole information by the addition of an angle precalculated and selected from tables, calculated in a computation center, or calculated by computation in the indicating unit.
REFERENCES:
patent: 3407508 (1968-10-01), Baskir
patent: 3587175 (1971-06-01), Armistead
patent: 3622971 (1971-11-01), Arps
patent: 3791043 (1974-02-01), Russell
Church George L.
Holder John E.
Johnson Donald R.
Martin, Jr. William D.
LandOfFree
Directional drilling of bore holes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Directional drilling of bore holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directional drilling of bore holes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2116257