Boring or penetrating the earth – With signaling – indicating – testing or measuring
Patent
1991-08-27
1992-11-17
Novosad, Stephen J.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
175 41, 175 45, 175 50, 175 61, 175107, 367 83, E21B 708, E21B 4712
Patent
active
051635216
ABSTRACT:
Improved techniques are provided for drilling a deviated borehole through earth formations utilizing a rotary bit powered by a drill motor, and for obtaining information regarding the borehole or earth formations while drilling. An inclinometer is positioned below the drill motor and within a sealed cavity of a housing fixed to a drill motor sub, and a transmitter within the sealed cavity forwards acoustic or radial wave signals to a receiver provided in a measurement-while-drilling tool. The MWD tool may be provided within a non-magnetic portion of the drill string, and further houses an accelerometer for sensing borehole direction. Both borehole inclination and directional signals are transmitted to the surface by the MWD tool, and the drilling trajectory is altered in response to the signals.
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Comeau Laurier E.
Pustanyk Randal H.
Baroid Technology Inc.
Novosad Stephen J.
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