Experimental Study of the Corrosion Behaviors on the Rod and Tube Material in Oil Pumping Wells

Abstract:

To study the corrosion behaviors on the rod and tube materials used in oil well is very important for prolonging oil well repairing periods, lowering oil production maintenance costs and increasing oil production efficiency. Through selecting some kinds of tube and rod materials which are always used in oilfield, chemical corrosion experiment and electrochemical corrosion experiment were carried out under different conditions. The results show that the corrosion rates are accelerated with material prestress increasing, liquid mineralization rate and temperature rising. The nitrified materials have better corrosive resistance than untreated materials. The electrochemical corrosion experiment results show that the electrode potentials of four materials (45, 20CrMo, J55, N80) have tiny difference and don’t exceed 20mV. The bimetallic corrosion tests show that the couple corrosion of the four selected materials pair can be ignored under short period and oxygen conditions.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 1790-1793
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.1790
• Online since: May 2011
• Authors: You Qiang Wang
• Keywords: Corrosion Behaviour, Experimental Study, Oil Pumping Well, Oil Tube, Rod Material

References

[1] B M Wei: Metal Corrosion Theory and Application (Chemistry Industry Publications, China 1984)

[2] X Zhou, B Y Zhang et al: Lubrication Engineering (in chinese). Vol.184 (2006), p.102

[3] G Fierro,G M Ingo,F. Mancia: Mater. Sc. Vol. 25-2B(1990), p.1407

[4] Q.L.He, H M Meng et al: Journal of Chinese Society for Corrosion and Protection. Vol. 27(2007), p.186

[5] B S Liu, X Zhou et al: Lubrication Engineering (in chinese). Vol.78 (2006), p.45

[6] Q Y Wang: Postdoctoral Working Report. Shengli Oilfield, 2004.