Rock extensometer

Details Rock extensometer Rock extensometer

E - Fixed Constructions

21

B

E21B 47/04 (2012.01) E21B 47/08 (2012.01)

Patent

CA 2141086

An extensometer for use in a borehole comprises a combination of linear motion transducers located with daisy wheel anchors, which may be attached together if desired with extension bars. Linkages are used to connect the transducers to the daisy wheel anchors. The transducers are set up to measure distance changes both axially along the hole or radially. The extensometer includes at least one axially measuring transducer, and at least two radially measuring transducers. The transducers change in value according to changes in borehole dimensions; the transducer values are monitored electrically.

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