Logging or measurement while tripping

Details Logging or measurement while tripping Logging or measurement while tripping

1994-09-22

1996-12-31

Eldred, J. Woodrow

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

3408551, 3408552, 175 40, 175 50, 175 49, G01V 300

Patent

active

055898254

ABSTRACT:
A method and apparatus are provided for obtaining measurements from a wellbore during tripping operations. A drilling sub is attached to the drillstring adjacent to or as near as possible to the drillbit before commencing normal drilling operations. Prior to commencing tripping operations, a logging tool is engaged within the drilling sub. The engagement of the logging tool within the drilling sub opens a window mechanism that enables the sensors of the logging tool to obtain data from the wellbore. As tripping operations are conducted, the logging tool obtains data along the length of the wellbore.

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Douglas S. Drumheller, Acoustical Properties of Drill Strings--J. Acoust. Soc. Sm. 85(3), Mar. 1989, pp. 1048-1064.

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