Measuring drillstem loading and behavior

Details Measuring drillstem loading and behavior Measuring drillstem loading and behavior

1986-09-17

1987-12-29

Novosad, Stephen J.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

73151, E21B 4700

Patent

active

047154519

ABSTRACT:
A drillstem loading and behavior measurement method and system includes spaced apart subs disposed at the upper end of the drillstem and connected to each other and to a power or conventional swivel and having strain gages and accelerometers mounted thereon in such a way as to measure axial loading, axial vibration, torsional loading, torsional vibration and bending modes of the drillstem during operation. Accelerometers are mounted on respective ones of the subs at a distance from each other sufficient to determine vibration waveforms in axial, torsional and bending modes.

REFERENCES:
patent: 3520375 (1970-07-01), Raynal et al.
patent: 3626482 (1971-12-01), Quichaud et al.
patent: 4150568 (1979-04-01), Berger et al.

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