Corrosion fatigue crack propagation behavior of S135 high–strength drill pipe steel in H2S environment

Liu, Ming; Luo, Sheji; Shen, Yi; Lin, Xiuzhou

doi:10.1016/j.engfailanal.2019.01.026

Cited by 32 publications

(8 citation statements)

References 30 publications

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“…However, compared with E OCP on 3rd day, the E OCP showed a larger positive deviation on 10th day, reaching 140 mV. Meanwhile, the passivation current density and over-passivation potential density increased 8.46 times (1.75 × 10 −7 A m −2 on 3rd day and 1.48 × 10 −6 A m −2 on 10th day) and 5.72 times (1.75 × 10 −7 A m −2 on 3rd day and 1.48 × 10 −6 A m −2 on 10th day), respectively, indicating that the anti-corrosion effect of 15CrMo steel was sharply weakened [28][29][30][31]. Therefore, when the experiment was lasting to 20th day, the polarization curve of 15CrMo steel showed complete activated corrosion characteristics, and the passivation zone thoroughly disappeared.…”

Section: Electrochemical Analysismentioning

confidence: 98%

Study on failure evolution of 15CrMo steel used for aviation kerosene hydrogenation unit

Liu

Wang

Cui

et al. 2023

Mater. Res. Express

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In aviation kerosene hydrogenation unit, the 15CrMo steel with good resistance to hydrogen embrittlement performed obvious pitting corrosion with certain micro-cracks in H2/H2S environment. In this paper, the failure behavior of 15CrMo steel in H2/H2S environment had been studied using electrochemical method and microscopic morphology. The results showed that within 10 days, the 15CrMo steel performed good resistance with a smaller max pit depth (15.48 μm on the 10th day) in H2/H2S environment, proved by the passivation zone (-0.75~-0.62 V on 10th day). Furthermore, 15CrMo steel exhibited activated corrosion with a significantly increasing max pit depth and corrosion current density, especially, reaching 131.91 μm and 17.29 μA/m2 on 30th day. Moreover, the stress corrosion cracking caused by H2S appeared on 30th day.

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Section: Electrochemical Analysismentioning

confidence: 98%

Study on failure evolution of 15CrMo steel used for aviation kerosene hydrogenation unit

Liu

Wang

Cui

et al. 2023

Mater. Res. Express

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“…The drill strings consist numbers of drill pipes which are connected through threads in the drill pipe joint, and the weakest points of the whole string usually located in such positions [2,3]. Nowadays, harsh service conditions in the ultra-deep gas well such as high temperature, high pressure, high content of corrosive medium, and complex load conditions during drilling, all have induced great failure risks to the drilling pipe joints in the drilling string [4][5][6]. According to incomplete statistics, drilling accidents caused by the failure of the drilling tools have reached to more than 500 times in the oil and gas field in China [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Fracture Failure Analysis of a 5-7/8” Drill Pipe Pin Joint in an Ultra-deep Gas Well

Ji,

Wang,

Feng

et al. 2024

J. Phys.: Conf. Ser.

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In recent years, the frequency of drill pipe failure accidents has increased during ultra-deep well drilling process. The fracture failure of pin joint of a 5-7/8” drill pipe happened in an ultra-deep gas well after thirty-five hours’ service. Failure causes were investigated by physical and chemical properties test of the material, macro and micro feature analysis of the fracture surface. The results showed that the physical and chemical properties of the drill pipe were all satified the corresponding standard requirements, the fracture of mode of the dill pipe is fatigue fracture, which was attributed to the harsh load condition during the reaming operation. Furthermore, the increased inner diameter of the pin joint also gives an acceleration of the fatigue fracture process.

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“…Similar studies about the corrosive effect of oxygen and H 2 S on the fatigue strength of drill pipe steel were performed in other research, as in Refs. [29][30][31][32][33][34][35][36] for G105, S135, and V150 steels. There are also other chemical elements that can have detrimental corrosive effects on the fatigue strength of drill pipes, such as Si, Cl, Al, and Ca, as highlighted in Refs.…”

Section: Introductionmentioning

confidence: 99%

Resonant Fatigue Tests on Polished Drill Pipe Specimens

Santus,

Romanelli,

Bertini

et al. 2024

Machines

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In this study, the fatigue strength of polished drill pipe specimens was investigated and compared with previous test results of corroded and not-corroded pipes. The resonant fatigue test rig, which was designed and implemented by the University of Pisa, is initially presented by providing a detailed description of the set-up of the machine, the calibration of the strain gauges, the control system, and the correct identification of the vibrational node locations. A polishing rig was also designed and put into operation to remove the corrosion pits from the outer surface of almost the entire length of the drill pipe specimens. After the fatigue tests with the resonant rig, and the observation of the fatigue fracture of the specimens, a few samples were extracted from different zones (corroded and not corroded) of the failed drill pipe specimens. This allowed for investigations to be carried out using a scanning electronic microscope. The obtained results were analyzed using the Murakami model, and a discussion is presented about the effect of the corrosion pits on the fatigue strength.

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Corrosion fatigue crack propagation behavior of S135 high–strength drill pipe steel in H2S environment

Cited by 32 publications

References 30 publications

Study on failure evolution of 15CrMo steel used for aviation kerosene hydrogenation unit

Study on failure evolution of 15CrMo steel used for aviation kerosene hydrogenation unit

Fracture Failure Analysis of a 5-7/8” Drill Pipe Pin Joint in an Ultra-deep Gas Well

Resonant Fatigue Tests on Polished Drill Pipe Specimens

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