Coring assembly for mounting on the end of a drill string

Details Coring assembly for mounting on the end of a drill string Coring assembly for mounting on the end of a drill string

1991-03-08

1992-04-14

Neuder, William P.

Boring or penetrating the earth

Tool shaft advanced relative to guide insertable in...

With anchor for guide engaging hole side wall

175230, 175244, 175267, 175284, E21B 706, E21B 2516

Patent

active

051039214

ABSTRACT:
There is provided a new and useful coring assembly for mounting on the end of a drill string and comprising a core barrel; abrading means on at least a part of the core barrel; a reaming collar mounted about a lower section of the core barrel and selectable between a first condition in which the collar is rotatable with the barrel and a second condition in which the collar is rotatable relative to and slidable longitudinally relative to the core barrel; a housing suspended from the core barrel; a deflection crank extending between the housing and the core barrel; and means within the housing for transferring power from a power source to the crank for selectively rotating the crank for moving the core barrel between a first position in which the core barrel and the housing are aligned and a second position in which the barrel and the housing are not aligned.

REFERENCES:
patent: 1750953 (1930-03-01), Boynton
patent: 2061317 (1936-11-01), Brack
patent: 2709574 (1955-05-01), Arutunoff
patent: 3175392 (1965-03-01), Tharalson et al.
patent: 3572450 (1971-03-01), Thompson
patent: 4978258 (1990-12-01), Lins

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