Bit-stabilized combination coring and drilling system

Details Bit-stabilized combination coring and drilling system Bit-stabilized combination coring and drilling system

E - Fixed Constructions

21

B

E21B 25/00 (2006.01) E21B 10/02 (2006.01) E21B 10/64 (2006.01) E21B 25/02 (2006.01) E21B 25/08 (2006.01) E21B 25/16 (2006.01) E21B 41/00 (2006.01) E21B 47/00 (2006.01) E21B 47/01 (2006.01) E21B 47/06 (2006.01) E21B 47/12 (2006.01) E21B 47/14 (2006.01) E21B 47/18 (2006.01)

Patent

CA 2158903

A core barrel having an inner tube for coring and, alternately, a center plug assembly for closing the throat of the core bit at the bottom of the assembly for drilling in lieu of coring. The inner tube assembly and plug assembly are disposable and retrievable through the drill string on a wireline using an overshot. The core bit is of a stabilized, preferably anti-whirl, design and may be a low-invasion core bit used in cooperation with a low-invasion coring shoe. A logging tool and data transmission assembly may be incorporated in the plug assembly for logging while drilling.

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