American Journal of Physics and Applications

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Volume 6, Issue 3, May 2018

  • Optimization of Hydraulic Horsepower to Predict the Rate of Penetration

    Herianto

    Issue: Volume 6, Issue 3, May 2018
    Pages: 63-75
    Received: 22 February 2018
    Accepted: 19 March 2018
    Published: 10 May 2018
    DOI: 10.11648/j.ajpa.20180603.11
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    Abstract: The rate of penetration has an important role in the success of a drilling operation, this is because if the rate of penetration is not optimum will have an impact on the cost incurred. Some factors that influence the rate of penetration are the weight on bit, rotation per minute and horsepower. Based on the analysis obtained WOB and RPM values are... Show More
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  • Impurity State of Transition Group Elements in the Silicon Lattice in the Process of Their Interaction with Sulfur

    Shaikrom Askarov, Sharipov Bashirulla, Srazhev Solizhon, Toshboev Tuchi, Salieva Shokhista

    Issue: Volume 6, Issue 3, May 2018
    Pages: 76-79
    Received: 7 February 2018
    Accepted: 21 March 2018
    Published: 14 June 2018
    DOI: 10.11648/j.ajpa.20180603.12
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    Abstract: On the basis of comparative analysis of electrical properties of silicon doped with sulfur and nickel respectively at temperature range of 1000-1250°C in 50°C increments and after their subsequent thermal annealing at temperature range of 400-950°C together with control samples of silicon doped with sulfur and nickel, it was revealed that impurity ... Show More
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