Calculation Method for Inflow Performance Relationship in Sucker Rod Pump Wells Based on Real-Time Monitoring Dynamometer Card

Figure 1

Plate of abnormal dynamometer card.

(a) The slope of AB is equal to zero

(b) The slope of AB is less than zero

(c) The upper step appears in BC

(d) The lower step appears in BC

(e) The upper boss appears in BC

(f) The lower boss appears in BC

(g) The height of BC is inclined downward

(h) The slope of CD is greater than zero

(i) The upper step appears in DA

(j) The upper boss appears in DA

(k) The lower boss appears in DA

(l) The height of DA is inclined upward