OIL WELL TUBING DEWAXING PROCESS REMOTE CONTROL SYSTEM Russian patent published in 1995 - IPC

FIELD: oil producing industry. SUBSTANCE: oil well tubing dewaxing process remote control system involves remote control of three parameters. The first parameter is the rope sag. This parameter is controlled by means of sensor 8, additional switching unit 9, current sensor 10, first comparator 11, and first level former 15. The second parameter is overstrain of the rope. This parameter is controlled by means of additional switching unit 9, current sensor 10, second comparator 12, and second level former 16. The third parameter is whether or not the scraper reaches the top position in the well. This parameter is controlled by means of additional switching unit 9, current sensor 10, differential unit 14, third comparator 13, and third level former 17. The outputs of the first, second, and third comparators are connected to input of control unit 7. EFFECT: higher efficiency. 1 dwg