A mathematical model of joint motion of the sucker rod string and plunger in the cylinder at gas-water-oil mixture pumping fr om the deviating hole taking into account complications in the sucker rod pump operation: valve leakage, gas and emulsions effect, improper fit of the plunger in the cylinder. The behavior of dynamic loads on the polished rod at deviations from normal operation of sucker rod pump is predicted with the help of the proposed model. Calculated dynamometer cards are compared with the field measurements.
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