Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Patent
1996-10-17
1999-12-28
Dang, Hoang
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
175 44, 175 58, 175246, 175257, 7315243, E21B 2502, E21B 4902
Patent
active
060068442
ABSTRACT:
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. Alternatively, sensors for logging borehole parameters and a data transmission assembly may be incorporated in the inner tube assembly, in the wall of the core barrel, above the core barrel, or in a combination of such locations. A significant feature of the apparatus and its operation is the ability to concurrently sense one or more characteristics of the formation surrounding the core barrel in combination with the sensing of one or more such parameters of the core being cut as it proceeds into the inner tube assembly.
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Collee Pierre E.
Harrell John W.
Johnson Michael H.
Puymbroeck Luc Van
Baker Hughes Incorporated
Dang Hoang
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