[Retracted] Dynamic Simulation Analysis of Carbon-Steel Hybrid Sucker Rod String in Vertical and Directional Wells

Figure 10

Variation of bending stress of new and traditional rod string in vertical wells. (a) Bending stress of new carbon-steel hybrid rod string (1650–2200 m). (b) Bending stress of new carbon-steel hybrid rod string (0–1650 m). (c) Bending stress of traditional steel rod string (0–2200 m).

(a)

(b)

(c)