Now showing items 1-8 of 8

  • Advances in the Discrete Element Method for drilling mechanics problems 

    Oñate Ibáñez de Navarra, Eugenio; Arrufat Garcia, Ferran; Zárate Araiza, José Francisco; Ubach Fuentes, Pere-Andreu; Gandikota, Varadaraju; Ring, Lev (2013)
    Conference report
    Restricted access - publisher's policy
    We present recent developments in the Discrete Element method (DEM) for analysis of drilling mechanics problems typical in the oil and gas industry. A new local DEM constitutive model able to predict the non-linear behavior ...
  • A particle-based method for analysis of cuttings transport in wellbores 

    Celigueta Jordana, Miguel Ángel; Latorre Sánchez, Juan Salvador; Ubach Fuentes, Pere-Andreu; Miquel Canet, Juan; Oñate Ibáñez de Navarra, Eugenio; Gandikota, Varadaraju; Deshpande, Kedar M. (2013)
    Conference report
    Restricted access - publisher's policy
  • Assessing the impact of squeezing ground on TMB excavation 

    Ferrer Serlev, Andreas (Universitat Politècnica de Catalunya, 2010-07-02)
    Minor thesis
    Open Access
    This study takes part in a major project that aims to provide a ready to use tool which will give information of squeezing phenomena to engineers and TBM designers in terms of: - Quantification of squeezing rates of the ...
  • Electroplastic cutting influence on power consumption during drilling process 

    Hameed, Saqib; González Rojas, Hernan Alberto; Sánchez Egea, Antonio José; Nápoles Alberro, Amelia (2016-03-12)
    Article
    Open Access
    The aim of this study is to report the use of non-conventional material removal process technique. It was found that electropulses (EPs) assisted drilling process improves the material machinability based on the eletroplastic ...
  • Fluid effects in sand production simulations coupling DEM with CFD 

    Climent Pera, Natalia; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; O'Sullivan, Catherine (CRC Press Taylor & Francis Group, 2014)
    Conference report
    Restricted access - publisher's policy
    Sand production around a wellbore is here simulated using a three dimensional numerical model based on Discrete Element Method (DEM) coupled with Computational Fluid Dynamics (CFD). The model is calibrated against a ...
  • In-situ density estimation by four nondestructive techniques on Norway spruce from built-in wood structures 

    Fernández Llana, Daniel; Íñiguez-González, Guillermo; Montón Lecumberri, Joaquín; Arriaga Martitegui, Francisco (2018-06-05)
    Article
    Open Access
    Needle penetration resistance (NPR), screw withdrawal resistance (SWR), core drilling (CD) and drilling chips extraction (DCE) are nondestructive and semi-destructive techniques used to estimate density in timber structures. ...
  • Investigation of the wear of hard-metal drilling tools when drilling cast iron 

    Escursell Mor, Anna (Universitat Politècnica de Catalunya / Technishe Universität Darmstadt, 2009)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Spheroidal cast iron still has a lot of applications; especially in the automotive industry. In this Master Thesis the wear of the drilling tools and its effect on the quality of the drilled holes is being studied. An ...
  • Testing a new submersible drill rig 

    Romero, F.; Devincenzi, M.J.; Pérez Garcia, N.; Arroyo Alvarez de Toledo, Marcos; Deu, Amadeu (Society for Underwater Technology, 2013)
    Conference report
    Restricted access - publisher's policy
    The paper describes the main features and initial underwater field-testing results of a remotely operated submersible drill rig designed to obtain continuous cores of soil and/or rock up to 6m long in water depths of 200m. ...