高含水原油对D级抽油杆、N80型油管摩擦性能的影响

1. Introduction With the development tail of oilfields in East Chinathe water cut of produced liquid from oil wells is risinggradually. For example, in some oilfields, the water cuis up to 95% (Li and Guo, 2000), which may causepartial friction of the suc…

Effect of Produced Fluid on the Wear Behavior of Grade D Sucker Rod and N80 Type Tubing

Inuestigated wear tests of grade D sucker rod and N80 tubing with a produced liquid are the effect of the water cut of produced liquid on the wear rate and the wear coefficient of the friction pair. And presented here is a comparison of tribological performance of tubing/sucker rod with sprayed tubing/sucker rod and tubing/sprayed sucker rod. The results show that one of the main reasons for wear failure between the sucker rod and the tubing is a high water cut of the produced liquid. The wear rate increases greatly when the water cut ranges from 70% to 85%, and increases gradually when the water cut is less than 70% or more than 85%. The higher the water cut is, the greater the wear rate will be. SEM (scanning electron microscope) micrographs show that the worn surface of the tubing is smoother, with shallow grooves, when the water cut is 55%; when the water cut is 95%, there are broader and deeper grooves on the worn surface. The results also show that the wear rate of the sprayed wear-resistant coating of sucker rod/tubing is less than that of the unsprayed sucker rod/tubing.