Results 31 to 40 of about 532 (178)
, 2022 Boliden’s Garpenberg mine produces Zn-Pb-Ag(Cu-Au) using a sublevel stoping with pastefill mining method. The orebody is strongly affected by the existence of weakness zones mainly consisting of Talc Schist and Phlogopite Schist which affect the design, planning and production of the stope.
Peroulakis, Ioannis
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Normalizing Large Scale Sensor-Based MWD Data: An Automated Method toward A Unified Database [PDF]
SensorsIn the context of geo-infrastructures and specifically tunneling projects, analyzing the large-scale sensor-based measurement-while-drilling (MWD) data plays a pivotal role in assessing rock engineering conditions.
Abbas Abbaszadeh Shahri +3 more
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ELECTROMAGNETIC MWD/LWD - WHERE AND WHY?
Rudarsko-geološko-naftni Zbornik, 1996 Application of electromagnetics as a mean of data transfer from bottom hole assembly to the surface during deep well drilling is described. Particularly, it is convenient when drilling with foam, aerated mud or air drilling in underbalance condition ...
Ivo Steiner
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Meitian dizhi yu kantanObjective and Methods This study aims to determine the factors influencing the detection performance of the electromagnetic azimuthal resistivity measurement while drilling (MWD) tool for coal mining in horizontal wells.
Gang CHEN
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IEEE AccessThe complex environments of Measurement-While-Drilling (MWD), characterized by intense vibrations and high temperatures, can lead to random attenuation of optical intensity, phase mismatch, and signal distortion, thereby reducing the signal-to-noise ...
Xiaoyang Yu +3 more
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Study of Downhole Lateral Force Measurement Modelling and Devices in Petroleum Exploration
Energies, 2022 Measurement while drilling (MWD) technology is important for obtaining downhole parameters. As an essential parameter in drilling engineering, lateral force provides a powerful reference basis for judging the downhole drilling direction.
Kui Deng +5 more
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Research on Mud Pulse MWD Device for Mines [PDF]
E3S Web of Conferences, 2021 As the core accoutrement of directional drilling construction, the measurement while drilling (MWD) device can be divided into three types due to the different data transmission methods: wired, mud pulse and electromagnetic wave.
Jun Gao
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Mine-used electromagnetic MWD system and its application
Meikuang Anquan, 2021 Aiming at the problems of high manufacturing cost and easy damage of communication cable joint in the central cable type drill pipe, which is the cable transmission device for directional drilling in underground coal mine, an electromagnetic measurement ...
GU Lidong, WANG Kaibin, ZHAO Jiajia
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Directional drilling technology with mud pulse wireless MWD in underground coal mine
Meikuang Anquan, 2021 The directional drilling technology with mud pulse wireless MWD in coal mine was presented. We introduce the principle of the technology and analyze three key technologies: the wireless MWD with mud pulse, the compound directional drilling and the ...
LI Quanxin, CHU Zhiwei, XU Chao, FANG Jun
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