International Journal of Oil, Gas and Coal Engineering

Volume 6, Issue 4, July 2018

  • Application of Automatic TIG Welding for Yamal LNG Process Piping Fabrication

    Zhijian Wang, Yanyan Li, Chiaming Chang

    Issue: Volume 6, Issue 4, July 2018
    Pages: 44-49
    Received: 5 June 2018
    Accepted: 26 June 2018
    Published: 24 July 2018
    Abstract: The representative materials, used in Russian Yamal LNG project, are ASTM A333 Gr.6 (low temperature carbon steel, designed temperature of –50°C) and ASTM A312/A358 TP304/304L (austenitic stainless steel, designed temperature of –196°C). The welding technical specification demands TIG (Tungsten Inert Gas) welding for root welding of piping. This pr... Show More
  • Simulation and Experimentation of Torkbuster Based on ANSYS/LS-DYNA

    Hongyan Ma, Jingwang Chen, Daning Wang, Shibo Su, Xianjing Yang, Xiangzhen Cheng, Xiangjun Qu

    Issue: Volume 6, Issue 4, July 2018
    Pages: 50-59
    Received: 13 June 2018
    Accepted: 5 July 2018
    Published: 30 July 2018
    Abstract: The stick-slip vibration in deep hard formation is a technical bottleneck restricting the efficient use of PDC bit. In order to combat the stick-slip phenomenon during drilling in deep hard formations, we introduced the high frequency self-excited torkbuster. Based on the analysis of the working principle of the torkbuster, a nonlinear dynamic thre... Show More
  • Study on Coal Methane Adsorption Behavior Under Variation Temperature and Pressure-Taking Xia-Yu-Kou Coal for Example

    Hao Jingyuan, Li Dong, Zhang Xuemei, Ma Qinghua

    Issue: Volume 6, Issue 4, July 2018
    Pages: 60-66
    Received: 25 June 2018
    Accepted: 9 July 2018
    Published: 1 August 2018
    Abstract: Based on the Langmuir volume and Langmuir pressure of Xiao-Yu-Kou #3 coal’s methane adsorption, Li’s adsorption-flow equation’s parameters have been calculated. LI adsorption-flow equation obtained can visually show and quantitatively calculate that how and how much variation temperature and pressure change the absorption capacity. Partial differen... Show More
  • Evaluation on the Organic Rankine Cycle Generator Sets Firstly Applied in China’s Petrochemical Industry

    Chi Shenggang, Zhou Tiantian, Wang Fangsong

    Issue: Volume 6, Issue 4, July 2018
    Pages: 67-73
    Received: 2 July 2018
    Accepted: 16 July 2018
    Published: 14 August 2018
    Abstract: The Organic Rankine Cycle (ORC) generator sets operated on the low-temperature waste heat device of an aromatics complex is the first demonstration set in the chinese petrochemical industry. By taking this set as an example, the paper introduced the circulation processes of the heating medium water and the ORC working medium in the low-temperature ... Show More
  • Investigation and Comparison of Emulsified Diesel Oil and Flomin C 9202 as a Collector in the Beneficiation of Ultra-Fine Coal by Agglo-Flotation

    Richard Muthui Kasomo, Sammy Ombiro, Bernard Rop, Nicholas Muthama Mutua

    Issue: Volume 6, Issue 4, July 2018
    Pages: 74-80
    Received: 10 July 2018
    Accepted: 23 July 2018
    Published: 18 August 2018
    Abstract: Modern mechanized mining techniques produce enormous quantities of coal fines. Reagents regime (i.e. reagents usage and reagent type) is an important fundamental factor in the process of recovering and dashing of ultra-fine coals (coal fines). The other factors that are crucial for recovery and the purity of the final product obtained is the nature... Show More