Fatigue gauge for drill pipe string

Measuring and testing – Borehole or drilling – Downhole test

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Details

73787, E21B 4700

Patent

active

044098243

ABSTRACT:
Strain gauges are attached to a drill pipe which is inserted into a drill pipe string to be used in a well. The strain gauges are connected to an electrical circuit containing devices for digitizing the electrical signals generated by the strain gauges in response to the detection of strain and for recording and retaining the digitized signals until the drill pipe string is extracted from the well. The electrical circuit provides a communication path through which the stored digitized data is transferred to an external device when the drill pipe string is extracted from the well.

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patent: 4043191 (1977-08-01), Mills
patent: 4174628 (1979-11-01), van den Bussche et al.
patent: 4184205 (1980-01-01), Morrow

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