Logging while raising a drill string

Details Logging while raising a drill string Logging while raising a drill string

E - Fixed Constructions

21

B

255/1

E21B 49/00 (2006.01) E21B 47/00 (2006.01)

Patent

CA 1119580

ABSTRACT LOGGING WHILE RAISING A DRILL STRING In logging a well substantially as soon as it is drilled, at least one measuring transducer and a transducer-moving means are mounted within a lower portion of a segmented electrically- conductive drill string. At least one downhole transducer is moved in response to an electrical command and is held near or against the borehole wall while the drill string is raised and a recording is made of electrical signals indicative of both the downhole transducer measurements and the distance the drill string is raised.

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