|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Energy Materials 2017: Materials for Oil and Gas and AMREE Oil & Gas III
||Research on the Pinpoint Controlling of CRA N08028 OCTG Microstructure and Properties
||Pan Dong, Zhiqiang Yu, Guangwei Fan, Genshu Zhou, Pengsheng Yao, Zhifang Zhang
|On-Site Speaker (Planned)
CRA N08028 OCTG pipes and couplings as Cold-Hardened for O&G field down-hole application in H2S environment were prepared by hot extrusion and pilgering. Chemical homogeneity, Sigma phase precipitation, quality of raw pipe precursor, cold deformation, etc. were investigated in detail. By diffusion annealing at 1220 ℃ for 30h, the residual segregation indices of the specified elements were all under 0.2. The raw pipe precursor was solid-solutioned by heating to 1135 ℃ and quenching to clear up the detrimental effect of Sigma phase precipitation. Hot extrusion speed had a remarkable effect on the quality of raw pipe precursor and appropriate parameters could guard against delamination and thickness heterogeneity. The mechanical properties and corrosion-resistance had heavy dependence on cold deformation and ratio of 30-42% would ensure the mechanical properties meet the specifications. The corrosion test results indicated CRA N08028 OCTG by TISCO could be employed in typical sour O&G field globally.
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