DEVICE FOR MEASUREMENT OF DEFORMATIONS IN ROCKS MASS Russian patent published in 2009 - IPC E21C39/00 G01B11/16 

FIELD: mining.

SUBSTANCE: invention is related to mining, to devices for measurement of deformations and contortions in wells and boreholes. Device comprises fixed contact in the form of twisted cylindrical spring. Inside of it there is a movable contact arranged in the form of elastic cylinder with sliders that are evenly distributed along circumference. Spring contacts are connected to registration device. Supports are fixed on external surface of spring turns. It is necessary to reduce spring diametre in process of device installation in well. For this purpose device is equipped with accessory for spring tension or accessory for axial twisting of spring.

EFFECT: simplified design and improved accuracy of measurement.

3 dwg