Thermal osteonecrosis and bone drilling parameters revisited
Archives of Orthopaedic and Trauma Surgery, 2007 During the drilling of the bone, the temperature could increase above 47 degrees C and cause irreversible osteonecrosis. The result is weakened contact of implants with bone and possible loss of rigid fixation. The aim of this study was to find an optimal condition where the increase in bone temperature during bone drilling process would be minimal ...
Augustin, Goran +5 more
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The study of melting process of the new plugging material at thermomechanical isolation technology of permeable horizons of mine opening [PDF]
, 2018 The article presents the results of experimental and theoretical studies, the purpose of which was to substantiate the technology of drilling wells isolation using new thermoplastic composite material.
Dreus, Andrii +3 more
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RESULTS AND CHARACTERISTICS OF 5G HOLE DRILLING AND THE FIRST TAPPING OF LAKE VOSTOK
Лëд и снег, 2015 We present here a brief description of the drilling operations in the deep 5G hole at the Russian Vostok Station with more detailed account of the final stage of this long-term project successfully ended on February 5, 2012 with the first Lake Vostok ...
N. I. Vasil’ev +4 more
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Abrasive water jet drilling of advanced sustainable bio-fibre-reinforced polymer/hybrid composites : a comprehensive analysis of machining-induced damage responses [PDF]
, 2018 This paper aims at investigating the effects of variable traverse speeds on machining-induced damage of fibre-reinforced composites, using the abrasive water jet (AWJ) drilling.
A Alberdi +44 more
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Determination of the suitable drilling operating parameters in different geological formations El-Sharara Oil Field (South-Western Libya) [PDF]
, 2018 Purpose. The objective of this study is to determine the best operating conditions for the most notable drilling parameters (i.e. weight on bit (WOB), rotary drilling speed (RPM), and characteristics of drilling fluid) using field data obtained from El-
Abdellah, W, Boghdady, G, Sayed, M
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Optimization Drilling Parameters Performance During Drilling in Gas Wells [PDF]
International Journal of Oil, Gas and Coal Engineering, 2017 The objective of the present work is to optimize drilling parameters such as WOB, ROP, RPM, flow rate and drill diameter of hole. The research contribution to investigation and analysis field data. This paper focuses on the optimization of drilling parameters.
openaire +1 more source
Weathered rock characterization using drilling parameters [PDF]
Canadian Geotechnical Journal, 2003 The characterization of weathered rocks by the use of drilling parameters is presented. Drilling parameters obtained from the drilling process monitoring system during the installation of soil nails into weathered rocks are used in this investigation. A new drilling index Pi, simplified from the concept of the specific energy, is used in an attempt to
Law, KT +4 more
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Drilling Process in γ-TiAl Intermetallic Alloys [PDF]
, 2018 Gamma titanium aluminides (gamma-TiAl) present an excellent behavior under high temperature conditions, being a feasible alternative to nickel-based superalloy components in the aeroengine sector.
Beranoagirre Imaz, Aitor +3 more
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Damage assessment of drilled hybrid composite laminates [PDF]
, 2008 Hole drilling operations are common in fibre reinforced plastics - FRP’s - to facilitate fastener assembly to other parts in more complex structures. As these materials are non-homogeneous, drilling causes some damages, like delamination, for example ...
Durão, Luís M. +3 more
core +2 more sources
Design of drilling parameters monitoring system of directional drilling rig in coal mine tunnel
Gong-kuang zidonghua, 2019 In view of problems of deficiencies in real-time display and centralized storage of drilling parameters of full hydraulic directional drilling rig in coal mine tunnel, a drilling parameters monitoring system of directional drilling rig in coal mine ...
FANG Peng
doaj +1 more source