FLUID LOAD LINE CALCULATION, CONCAVITY TEST AND ITERATIONS ON DAMPING FACTOR FOR DOWNHOLE PUMP CARD

摘要

FIELD: pumps.;SUBSTANCE: invention relates to downhole pump units. Pump apparatus has downhole pump disposed in wellbore and motor at the surface. Rod string in operative mode moved by motor, reciprocates the downhole pump in wellbore. Downhole card indicating load and position of the downhole pump is generated using surface measurements and wave equation model, having upstroke damping factor and downstroke damping factor. Actual fluid load lines are determined from the downhole card for upstrokes and downstrokes of the downhole pump, and calculated fluid load lines for from the strokes are determined from load values distributed on the downhole card.;EFFECT: enables to transmit data at remote location with high reliability.;26 cl, 33 dwg