Results 141 to 150 of about 643,401 (321)
Archaeometry, EarlyView.ABSTRACT With northern regions warming at twice the global rate, assessing the state of archaeological sites in these areas is critically important. In this study, we used a multimethod geophysical approach (ERT, GPR, and EMI) to characterize the current geocryological conditions of an Inuit archaeological site on South Aulatsivik Island (Labrador ...
Rachel Labrie +5 more
wiley +1 more source
Reaming While Drilling Drillstring Structure Optimization and Application Performance Evaluation
Shiyou jixie, 2016 The reaming tool BHA is the most important controllable factor during reaming while drilling operations,whereas the irrational drill string structure could lead to intensified drill string vibration.In view of this,the drill string-formation finite ...
Zhang Qiang, Fu Jianhong, Li Haoran
doaj
Експериментальні дослідження енергопередавальних функцій бурильної колони у стовбурі скерованої свердловини [PDF]
, 2012 Описано експериментальні дослідження потужності під час обертання бурильної колони та сил опору при її осьовому переміщенні у стовбурі скерованої свердловини.
Жолоб, Н. Р. +3 more
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British Journal of Educational Technology, EarlyView.Abstract With the increasing application of GenAI in education, researchers and practitioners are paying more and more attention to its effectiveness and impact in teaching and learning. This can be evidenced by the increasing number of literature reviews on this topic published in recent years.
Zhiping Liang +5 more
wiley +1 more source
Influence of Physical Parameters on Acoustic Transmission Characteristics of Drill String Channel
Shiyou jixie, 2019 The in-depth study of the transmission characteristics of sound waves in the drill string is of great significance for the development of sound transmission systems. The drill string is considered as pipeline composed of different uniform circular tubes.
Huang Mingquan, Zhao Guoshan, Tan Zhe
doaj
Study on Mechanism of Stick–Slip Vibration Based on Torque Characteristics of PDC Bit
Applied SciencesStick–slip vibration (SV) of drill string systems is the main cause of fatigue failure of PDC bits under complex drilling conditions. Exploring its mechanism is helpful for identifying the causes of bit failure and developing preventive measures to ...
Lijun Li, Chunliang Zhang, Aixuan Wu
doaj +1 more source
Information and affective valence influence judgments of complexity, liking and understanding
British Journal of Psychology, EarlyView.Abstract Visual complexity is a key factor in perceptual and evaluative judgments. People's representation of visual complexity is constructed from quantitative and structural image features, but it is also influenced by familiarity and expertise. We examined how people represent visual complexity and its impact on perception and evaluation, focusing ...
Xiaolei Sun +3 more
wiley +1 more source
Early Inspection of Drill String Fatigue Damage Based on Metal Magnetic Memory Method
Shiyou jixie, 2017 Drill string fracture frequently occurred during drilling operation seriously affected the exploration and development of oil and gas resources.To address the issue,the metal magnetic memory (MMM) detection technique was applied to the drill string ...
Hu Zhibin +6 more
doaj
Numerical Investigation of the Nonlinear Drill String Dynamics Under Stick–Slip Vibration
VibrationThis paper presents a comprehensive analysis of the influence of rotary table velocity, weight-on-bit, and viscous damping on the drill string stick–slip vibration.
Mohammad Javad Moharrami +2 more
doaj +1 more source
Monitoring and Analysis of Frozen Debris Lobes, Phase I [PDF]
, 2012 INE/AUTC 12 ...
Daanen, Ronald P. +2 more
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