Boring or penetrating the earth – With means movable relative to tool to receive – retain – or... – Receiver removable through below-ground tool shaft
Patent
1994-09-23
1996-10-29
Novosad, Stephen J.
Boring or penetrating the earth
With means movable relative to tool to receive, retain, or...
Receiver removable through below-ground tool shaft
175 50, 175 58, 175226, 1754051, E21B 1002, E21B 2502, E21B 4700, E21B 4712
Patent
active
055688381
ABSTRACT:
A core barrel having an inner tube for coring and, alternately, a center plug assembly or 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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Sinor, L. A., et al. "Development of an Anti-Whirl Core Bit" Society of Petroleum Engineers, pp. 413-425, 1992.
Eastman Christensen Catalog, "Slimhole Coring", undated.
Collee Pierre E.
Struthers Barry W.
Baker Hughes Incorporated
Novosad Stephen J.
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