Results 41 to 50 of about 281 (180)
MathematicsFault dynamometer cards are the basis of the diagnosis technique for sucker rod pumping systems. Predicting fault cards with a pumping condition model is an economical and effective method.
Jiaojian Yin, Hongzhang Ma
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Engineering Reports, Volume 8, Issue 10, October 2026.Acoustic emission transmission modes for void damage in concrete‐filled steel tubes. ABSTRACT Concrete‐filled steel tubes (CFST) have been extensively employed in large‐scale construction projects as high‐performance composite structural members. Nevertheless, varying degrees of void damage frequently occur in CFST due to construction quality issues ...
Peng Tang, Ning Zhang
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A Uniform and Reduced Mathematical Model for Sucker Rod Pumping [PDF]
, 2004 The dynamic mathematical models were greatly developed to describe the motion of the sucker-rod pumping system since 1960s and various mathematic models based on different assumptions were presented. This paper does a study in three sides. First, a mathematical model is presented to describe the sucker-rod string with longitudinal and transverse ...
Leiming Liu +3 more
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“We Can No Longer Live by the Domostroi”: The Riddles of Anna Nikanorovna Paskhalova‐Mordovtseva
The Russian Review, Volume 85, Issue 4, Page 417-437, October 2026.Abstract This article analyzes the rebuses (picture riddles) of Anna Nikanorovna Paskhalova‐Mordovtseva. It argues that despite their seemingly modest nature as artefacts of everyday leisure, Mordovtseva used these puzzles to make radical claims and assert herself as a public intellectual.
Ksenia Butuzova, Julia Mannherz
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Running-in Position Determination of Centralizer for Anti-eccentric Wearing of Directional Well
Shiyou jixie, 2016 In the design of centralizer,it is usually assumed that the sucker rod coupling and the centralizer to be straight bars with equivalent cross-sectional areas.This is a bias that should be corrected.Based on the feature that sucker rod string with ...
Fu Yarong
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ChemElectroChem, Volume 13, Issue 18, 19 September 2026.Highlights Ionomers (PIL1‐d, Nafion, Sustainion XA9 & PTFE) have a significant effect on the performance of SnO2‐based gas diffusion electrodes (GDE) for eCO2RR. PIL1‐d effectively stabilizes SnO2 catalyst nanoparticles in spray‐coating inks and enhances eCO2RR towards formic acid.
Andrea Loi +10 more
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Calculation Methods and Influence Analysis of the Fullness Degree of Sucker Rod Pump
Shiyou jixie, 2018 To accurately calculate the fullness degree of the sucker rod pump, based on the movement balance equation of the oil entering the pump, considering the gas and oil status in the pump, and the effects of oil parameters, well parameters, pumping ...
Qu Baolong, Ma Weiguo
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Toward 100‐Watt‐Level Mid‐Infrared Supercontinuum Light Generation
Advanced Photonics Research, Volume 7, Issue 9, September 2026.Output power of mid‐infrared supercontinuum (SC) light sources severely prevents their application in long‐distance remote sensing, hyperspectral imaging, directional infrared countermeasures, and so forth. This work demonstrates a 100‐watt‐level all‐fiber mid‐infrared SC light source based on homemade low‐loss (~0.022 dB/m) fluorotellurite glass ...
Qian Zhang +9 more
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INFLUENCE OF OPERATING CONDITIONS ON LOADS AND FATIGUE STRENGTH IN A ROD COLUMN OF PCP
Известия Томского политехнического университета: Инжиниринг георесурсов, 2020 The relevance of the research is caused by the need to increase the reliability and resource of progressing cavity pumps, used in complicated well operating conditions, since they have low reliability in comparison with electrical submersible pumps, that
Kamil R. Urazakov, Bulat M. Latypov
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Research on Diaphragm Pump Fault Diagnosis Method Based on Res‐DCB‐Net
Asia-Pacific Journal of Chemical Engineering, Volume 21, Issue 5, September/October 2026.ABSTRACT Nonstationary pressure pulsation signals of diaphragm pumps contain strong background noise and coupled characteristics. This makes it challenging to extract incipient fault features and to decouple faults with similar physical mechanisms. To address these limitations, this paper proposes a spatiotemporal fault diagnosis model named Res‐DCB ...
Jiahui Wang +7 more
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