Mastering the manufacturing technology for thin-walled tube production on a TPA 159–426 tube-rolling aggregate

Ananyan, V. V.; Bunyashin, M. V.

doi:10.3103/s0967091207010147

Cited by 1 publication

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“…To diminish this effect, the lubrication and rotation of the ingot during expansion were advised. However, the tube still met the standard of the American Petroleum Institute (API), which is a maximum expansion of 12.5% [13]. The metallographs of the two samples are shown in Fig.…”

Section: Electrochemical Testingmentioning

confidence: 96%

Corrosion behavior of the expandable tubular in formation water

Gao

Dong

et al. 2015

Int J Miner Metall Mater

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Abstract:The corrosion behavior of expandable tubular materials was investigated in simulated downhole formation water environments using a series of electrochemical techniques. The corrosion morphologies in the real downhole environment after three months of application were also observed by stereology microscopy and scanning electron microscopy (SEM). The results show that, compared with the unexpanded sample, the area of ferrite increases dramatically after a 7.09% expansion. The expanded material shows a higher corrosion current in the polarization curve and a lower corrosion resistance in the electrochemical impedance spectroscopy (EIS) plot at every studied temperature. The determined critical pitting temperatures (CPT) before and after expansion are 87.5°C and 79.2°C, respectively. SEM observations demonstrate stress corrosion cracks, and CO 2 corrosion and H 2 S corrosion also occur in the downhole environment. Due to additional defects generated during the plastic deformation, the corrosion performance of the expanded tubing deteriorates.

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Section: Electrochemical Testingmentioning

confidence: 96%