METHOD FOR CONTROLLING DEEP PUMP DEVICE OF OIL WELL Russian patent published in 2004 - IPC

FIELD: oil extractive industry.

SUBSTANCE: method includes control of changes of forces in point of support of pump bars, measuring position of polished rod, determining its extreme upper and lower positions, setting a set-point for dynamic level of liquid in well shaft higher than pump receiving level and periodical disconnecting of device for collecting liquid. Values of forces are fixed at moments of passing extreme points until and after change of sign of movement direction for rod. On basis of fixed values of forces average values of forces are calculated in extreme upper and extreme lower dead points. Then level of liquid is determined from given formula, compared to value of set-point and from received deviation on given time of cycle time of pause for collecting liquid in well shaft is corrected.

EFFECT: higher productiveness and reliability.

1 dwg