AUTOMATED SELF-ADJUSTING LINEAR HEATER FOR HEATING LIQUID SUBSTANCE INSIDE A WELL (VARIANTS) Russian patent published in 2007 - IPC E21B36/04 E21B37/00 H05B3/56 

FIELD: oil extractive industry.

SUBSTANCE: automated self-adjusting linear heater consists of linear heater, made for example in form of cable line 1, consisting of low temperature cable 2 and high temperature heating cable 3, current-conductive wires on one end of which are connected to each other and isolated to form end dressing 4. Another end of cable is connected to power source 5. Cable line 1 is mounted outside the tubing column 6. Automated self-adjusting linear heater also contains ground-based measuring and controlling block 7, represented by, for example, programmable frequency electronic control module, and internal well measuring block, consisting of one or several indicators 8 for reading thermobaric parameters of fluid substance 9. Aforementioned indicators 8 are meant for converting current values of temperature and/or pressure to frequency, are connected to measuring and controlling block 7 by means of cable line 1 and mounted inside the body of tubing string 6 and/or in the body of its connecting sleeve 10 so, that sensitive element 11 of indicator 8 was located approximately flush with internal and/or external wall of tubing string 6 or with internal and/or external wall of connecting sleeve 10 depending on need for measuring parameters of fluid substance 9 inside the tubing string 6 and/or in behind-pipe space 12 of well.

EFFECT: increased precision and reliability of control over heating of liquid substance in a well with various extraction methods.

2 cl, 1 dwg