THERMOMETRY SYSTEM USING A FIBRE OPTIC CABLE AND A METHOD FOR THEIR MANUFACTURE Russian patent published in 2023 - IPC G01K11/32 G02B6/44 E21B47/07 

FIELD: temperature measurement systems.

SUBSTANCE: invention can be used to measure and record temperature along the entire length of an object placed in a gaseous, liquid or solid medium. A fibre optic cable for temperature measurement, placed in a flexible pumping compression pipe, the end of which is lowered into the well to the bottom hole deeper than the filtration perforated section of the wellbore, consists of an optical fibre with a quartz core and a temperature-resistant coating, an optical module in which the optical fibre is placed, and at least two layers of armour that are twisted around the optical module in different directions. The thermometry system consists of a source of focused radiation, an optical splitter, a signal processing unit including a receiving unit, and a fibre optic cable placed inside a flexible pump compressor pipe.

EFFECT: improving the accuracy of temperature measurement, including inclined and horizontal wells, along the entire length of the wellbore by strengthening both the mechanical and chemical protection of the fibre optic cable, preventing degradation of the fibre optic cable as a result of the penetration of atomic hydrogen, and as well as the reliability of the thermometry system as a whole.

30 cl, 9 dwg