DOWNHOLE PIPE TEMPLATE Russian patent published in 2023 - IPC E21B47/08 G01B5/12 

FIELD: pipes internal diameter measuring.

SUBSTANCE: invention can be used in means for measuring the internal diameter of pipes lowered into a well before lowering process equipment. The template for borehole pipes includes a hollow body with connecting elements at the top and bottom and calibrating elements placed on it between the dampers in the form of rings (5) with technological cuts (6). Technological sections (6) are made for the corresponding diameter of the measured borehole pipes. At the end of each damper facing the corresponding ring (5), an annular groove is made. The rings (5) above and below are equipped with at least three pins or annular protrusions located at the same radius from the longitudinal axis and made with the possibility of interacting with the corresponding groove of the damper. All technological cuts (6) are equipped with stress concentrators from the inside in the form of corresponding holes (11) located at the same radius from the longitudinal axis. The diameter of the holes is selected so that the ring (5) is deformed when the allowable load is exceeded.

EFFECT: improving the reliability and improving the accuracy of templating.

2 cl, 3 dwg