Results 11 to 20 of about 27,452 (263)
Frontiers in Earth Science, 2023 The rock properties are related to the stress environment and dynamic disturbance during construction, and the testing-while-drilling-technique was used for evaluation of rock properties.
Hua Tang +7 more
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Thermal osteonecrosis and bone drilling parameters revisited [PDF]
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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DIAGNOSTIC AND PERFORMANCE ANALYSIS OF DRILLSTRING VIBRATIONS IN ZUBAIR FIELD [PDF]
Romanian Journal of Petroleum & Gas Technology, 2020 In order to improve the drilling performance and prevent the drillstring damage, it is required to reduce the drilling vibrations of wells. Consequently, the main aim of paper is to diagnose and analyze the drilling vibrations for Zubair field wells ...
Hussein Al Gburi +3 more
doaj
The Influence of Bit Edge Shape Parameters on Bone Drilling Force Based on Finite Element Analysis
Applied Sciences, 2022 Bone drilling is a common surgery procedure. The drill bit shape directly affects the drilling force. Excessive drilling force may cause bone damage. In this work, on the premise of analyzing and comparing several finite element method (FEM) simulation ...
Tiancheng Huang +3 more
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A Sustainable Evaluation of Drilling Parameters for PEEK-GF30 [PDF]
Materials, 2013 This paper presents a study of hole quality and energy consumption in the process of drilling a thermoplastic polymeric material, polyether-ether-ketone, reinforced with 30% glass fibers (PEEK-GF30). PEEK-GF30’s capacity to be machined has focused on turning operations.
Rosario Domingo +3 more
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Applied Sciences, 2022 With the development of China’s oil and gas exploration and development to complex oil and gas fields, the drilling efficiency and safety of complex formations with large hardness and strong abrasiveness have become increasingly significant.
Chuanzhen Zang +7 more
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Stick–Slip Characteristics of Drill Strings and the Related Drilling Parameters Optimization
Processes, 2023 To eliminate or reduce stick–slip vibration in torsional vibration of the drilling string and improve the rate of penetration (ROP), a stick–slip vibration model of the drilling string considering the ROP was established based on the multidimensional torsional vibration model of the drilling string. The model was verified by simulation analysis.
Wang, Chao +4 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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Experimental study on rock cutting characteristics of granite broken by impregnated diamond bit
Jin'gangshi yu moliao moju gongcheng, 2023 The characteristics of rock cuttings are important factors affecting their annulus upward return. The indoor micro drilling experiment was carried out to study the characteristics of rock cuttings produced by impregnated diamond bit breaking granite.
Xin KANG +4 more
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Frontiers in Earth Science, 2022 The dynamic Young’s modulus (Edyn) is a parameter needed for optimizing different aspects related to oil well designing. Currently, Edyn is determined from the knowledge of the formation bulk density, in addition to the shear and compressional velocities,
Ahmed Abdulhamid Mahmoud +3 more
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