System for drilling deviated boreholes

Details System for drilling deviated boreholes System for drilling deviated boreholes

1995-04-24

1997-02-11

Lobo, Ian J.

Communications: electrical

Wellbore telemetering or control

Selective control of subsurface equipment

3408534, 3408536, 3408543, 3408561, 367 81, 367 83, 175 45, 175 61, G01V 140

Patent

active

056025416

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. A sensor permanently positioned in the drilling string between the drill bit and the drill motor detects a downhole parameter. An MWD tool may be provided within a non-magnetic portion of the drill string for receiving and transmitting a sensor representative signal to the surface. The sensor signal allows the drilling operation to be altered, and highly reliable and near-bit information thus improves the drilling operation.

REFERENCES:
patent: 4001773 (1977-01-01), Lamel et al.
patent: 4148408 (1992-09-01), Matthews
patent: 5160925 (1992-11-01), Dailey et al.
patent: 5410303 (1995-04-01), Comeau et al.
patent: 5467832 (1995-11-01), Orban et al.

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