DEVICE FOR MEASUREMENT OF OWN INTERNAL STRESSES AT FORMATION OF CEMENT STONE UNDER CONDITIONS OF CHANGE OF AMBIENT TEMPERATURE Russian patent published in 2025 - IPC G01N3/18 G01N3/60 G01N33/38 

FIELD: mining.

SUBSTANCE: invention relates to construction of oil and gas wells and is intended for investigation of processes of formation and change of own internal stresses in forming cement stone in conditions of change of ambient temperature from negative to positive values. Claimed device includes a base with a horizontal metal mould, strain gauges, a thermocouple, a signal recorder, and additionally comprises a vertical plate, which is made in the form of a rectangle, installed in the horizontal base centre, in which holes are made, into which the threaded studs are vertically installed and fixed, on which threaded end the clamping nut is installed, by one end the strain gauges are fixed from above on the vertical plate, and by the other through the holes, which are made in the side parts, the strain gauges are fixed on the threaded stud by the clamping nut, wherein the vertical plate, the horizontal base, the studs and the hold-down nuts are made of “Invar” material not subject to thermal deformation.

EFFECT: improving measurement accuracy of own internal stresses of cement sample.

1 cl, 3 dwg