Measuring and testing – Dynamometers – Responsive to multiple loads or load components
Patent
1989-12-29
1992-03-31
Ruehl, Charles A.
Measuring and testing
Dynamometers
Responsive to multiple loads or load components
73151, 338 6, 33790, G01L 516, G01B 718, E21B 4700
Patent
active
050997009
ABSTRACT:
An extensometric sensor for measuring stresses acting on a drilling element at a bottom of a well, with the sensor including a first measurement zone formed from at least two traction blades, on which are mounted measurement gauges, connected at their ends by uprights so as to form a first deformable parallelogram, with the traction blades being oriented in a first direction. A second measurement zone is formed of at least two torsion blades, on which are mounted measurement gauges, connected by cross pieces so as to form a second deformable parallelogram, with the torsion blades being oriented in a second direction perpendicular to the first direction. The first and second zones are connected and the same is mounted on a drilling element, with the cross pieces and uprights having large dimensions with respect to the torsion blades and the traction blades.
REFERENCES:
patent: 2070320 (1937-02-01), Shields
patent: 3613443 (1971-10-01), Curry
patent: 3686942 (1972-08-01), Chatard et al.
patent: 3855857 (1974-12-01), Claycomb
patent: 3995476 (1976-12-01), Hoffman
patent: 4160325 (1979-07-01), DeNicola
Mabile Claude
Morin Pierre
Institut Francais du Pe'trole
Ruehl Charles A.
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