CORROSION FATIGUE OF CARBON STEEL IN SALTS DRILLING FLUIDS

doi:10.3863/j.issn.1000-2634.1999.02.18

Abstract

Abstract:

Under load stresses and corrosion environment with high temperature and pressure , drill pipes occur corrosion fatigue crack easily in drilling mud. A simulated testing apparatus was used to study the crackprocessof drillpipes so as to find an efficient protection method in laboratory. Corrosion fatigue behaviors of steel 45 are studied using self - made rotary type bending corrosion fatigue testing apparatus in salt drilling fluids, as well the effect of some mechanics factors and medium factors, such as cyclic stress, load frequency, temperature , on the corrosion fatigue crack of steel 45 . Results showed that corrosion fatigue crack of steel45 was depended on the corrosion rate of steel 45,especially the extent of pitting corrosion. The corrosion fatigue life of steel 45 increased with the increase of load frequency.While temperature reached 45 C or so , the corrosion fatigue crack of steel 45 was the most quickly.

Key words: Carbon steel, Corrosion fatigue, Crack, Drilling fluid, Load frequency

CLC Number:

TE890.6

Fu Chao-yang Zheng Jia-shen Yao An-lin Li Jian. CORROSION FATIGUE OF CARBON STEEL IN SALTS DRILLING FLUIDS[J]. 西南石油大学学报(自然科学版), 1999, 21(2): 65-67.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.3863/j.issn.1000-2634.1999.02.18

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y1999/V21/I2/65

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CORROSION FATIGUE OF CARBON STEEL IN SALTS DRILLING FLUIDS

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