FIELD: mining.
SUBSTANCE: system includes a pressure sensor for measuring pressure in the well and providing the measured pressure at the outlet; an electronic derivative calculation circuit for calculating derivative of the measured pressure at the output; electronic detection circuit which detects the moment when plunger reaches the well bottom on the basis of derivative at the output. In addition, the derivative contains a second derivative. The method comprises measuring the well pressure and providing data of the measured pressure at the outlet, calculating the derivative of the measured pressure at the outlet. Detection of the moment when plunger reaches the well bottom on the basis of the calculated derivative, at that the derivative represents the second derivative. In another version, the system comprises a pressure sensor for measuring pressure in the well and providing the measured pressure at the outlet. An electronic derivative calculation circuit is configured for calculating the derivative of the measured pressure at the outlet. The electronic detection circuit which detects the moment when plunger reaches the well bottom on the basis of derivative at the output. The electronic detection circuit further receives input of synchronization data related to the beginning of running in the plunger into the well, and in which the electronic detection circuit detects the moment when the plunger reaches the well bottom on the basis of derivative and input of synchronization data.
EFFECT: increased accuracy of determination when plunger reaches the well bottom.
37 cl, 14 dwg
