Steering device for bottomhole drilling assemblies

Details Steering device for bottomhole drilling assemblies Steering device for bottomhole drilling assemblies

1999-06-16

2000-11-21

Schoeppel, Roger

Boring or penetrating the earth

Means traveling with tool to constrain tool to bore along...

1753252, E21B 704

Patent

active

061489336

ABSTRACT:
A coring apparatus permitting the taking of a non-rotating core sample and testing of same, as by NMR, prior to breakage and ejection from the apparatus. A core barrel is suspended from a rotating outer sleeve by one or more bearing assemblies which permit the core barrel to remain stationary during rotation of the sleeve with attached core bit for cutting the core. A core test device is fixed with respect to the core barrel on the outside thereof to test the core as it proceeds through the barrel. The apparatus optionally includes a directional detecting device such as an inclinometer and a compact set of circumferentially-spaced steering arms for changing the direction of the apparatus during coring.

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