Експериментальні дослідження неорієнтованих компоновок низу бурильної колони на механічних моделях [PDF]
, 2013 Розглядаються важливі питання підвищення техніко-економічних показників буріння нафтових і газових свердловин за рахунок вдосконалення технічних засобів і науково-методичних основ для їх експериментального дослідження.
Чудик, І. І.
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Improvement of hole drilling technology for ore drawing intensification [PDF]
, 2018 Purpose. The improvement of hole drilling for increasing the mineral recovery ratio by ore drawing improvement through blasting. Methods. The drilling parameters were examined for rock dumps.
Gaponenko, I +3 more
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European Journal of Social Psychology, EarlyView.ABSTRACT Ecological models explain social phenomena by assuming specific properties of the world an individual lives in. The evaluative information ecology model (Unkelbach et al. 2019) assumes two such properties: Positive information is more frequent (i.e., positivity prevalence), but negative information is more diverse (i.e., negativity diversity).
Anne I. Weitzel, Christian Unkelbach
wiley +1 more source
A parametric study for the design of an optimized ultrasonic-percussive planetary drill tool [PDF]
, 2016 Traditional rotary drilling for planetary rock sampling, in situ analysis, and sample return are challenging because the axial force and holding torque requirements are not necessarily compatible with lightweight spacecraft architectures in low-gravity ...
Harkness, Patrick +4 more
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Epilepsia Open, EarlyView.Abstract Objective The pathogenesis of epilepsy is closely associated with neuronal synaptic plasticity. MicroRNAs (miRNAs) can regulate various biological processes by binding to specific sequences on target genes. This study employs bioinformatics, molecular dynamics, and experimental approaches to investigate the mechanism by which MiR‐30a‐5p treats
Zhenlin Yang +4 more
wiley +1 more source
Permian Large Igneous Provinces and Their Paleoenvironmental Effects
Geophysical Monograph Series, Page 417-434., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jun Chen, Yi‐Gang Xu
wiley +1 more source
Shock and Vibration, 2016 Drill string vibrations and shocks (V&S) can limit the optimization of drilling performance, which is a key problem for trajectory optimizing, wellbore design, increasing drill tools life, rate of penetration, and intelligent drilling.
Guangjian Dong, Ping Chen
doaj +1 more source
Комп'ютерне моделювання механічної поведінки бурильних колон у надглибоких похило-скерованих свердловинах [PDF]
, 2007 Исследованы вопросы квазистатического равновесия протяженных криволинейных бурильных колонн. На основе постановки прямой и обратной задачи механики криволинейных гибких стержней сформулированы уравнения баланса внутренних и внешних сил, которые действуют
Гайдайчук, В. В. +3 more
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How to recognise a kick : A cognitive task analysis of drillers’ situation awareness during well operations [PDF]
, 2016 Acknowledgements This article is based on a doctoral research project of the first author which was sponsored by an international drilling rig operator.
Cleland, J., Flin, R., Roberts, R.
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, 1998 Data and supporting documentation were compiled and analyzed for 26 cases of gas grab samples taken during waste-tank core sampling activities between September 1, 1995 and December 31, 1997. These cases were tested against specific criteria to reduce uncertainties associated with in-tank sampling location and conditions.
openaire +2 more sources