Results 91 to 100 of about 583,413 (370)
Open Chemistry, 2019 Traditional water-in-oil drilling fluids are limited by their shear thinning behavior. In this article, we propose the synthesis of a thermal resistant quaternary ammonium salt gemini surfactant DQGE-I. This surfactant was synthesized using monomers such
Liu Yonggui +4 more
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Vibration characteristics of casing string under the exciting force of an electric vibrator
Natural Gas Industry B, 2017 Vibration cementing is a new technique that can significantly improve the bond strength of cementing interface. To popularize this technique, it is necessary to solve the key problem of how to make cementing string generate downhole radial vibration in ...
Yiyong Yin, Yinao Su, Zhaohui Wang
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Conceptual design of a noncontacting power transfer device for the ASPS Vernier system [PDF]
The conceptual of electrical power transfer across a magnetically controlled gap as discussed for several years. The design represents the culmination of the first serious attempt to design a very low force, noncontracting power transfer mechanism.
Drilling, J., Gunderman, T., Kroeger, J.
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PENERAPAN METODE PEMBELAJARAN KOOPERATIF SNOWBALL DRILLING UNTUK MENINGKATKAN HASIL BELAJAR MATA PELAJARAN SISTEM PEMINDAH TENAGA KOMPETENSI MEMELIHARA TRANSMISI KELAS XI TEKNIK KENDARAAN RINGAN SMK NEGERI 1 GANTIWARNO, KLATEN TAHUN AJARAN 2010/2011 [PDF]
, 2011 Penelitian ini bertujuan untuk meningkatkan hasil belajar siswa dengan memperbaiki proses pembelajaran dalam mata pelajaran sistem pemindah tenaga kompetensi memelihara transmisi melalui metode pembelajaran snowball drilling dan mengetahui seberapa besar
Agung Cipto, Pratomo
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Sequence Mining and Pattern Analysis in Drilling Reports with Deep Natural Language Processing
, 2017 Drilling activities in the oil and gas industry have been reported over decades for thousands of wells on a daily basis, yet the analysis of this text at large-scale for information retrieval, sequence mining, and pattern analysis is very challenging ...
Hoffimann, Júlio +3 more
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Advanced Engineering Materials, EarlyView.This study investigates the bond quality of co‐extruded aluminum–titanium hybrid profiles, focusing on the lateral angular co‐extrusion (LACE) process. It examines how heat treatments (HT) affect intermetallic phase formation, bond strength, and material properties.
Norman Mohnfeld +9 more
wiley +1 more source
A Different Perspective on the Solid Lubrication Performance of Black Phosphorous: Friend or Foe?
Advanced Engineering Materials, EarlyView.Researchers investigate black phosphorous (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli +5 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.Hybrid materials enable high‐performance components but are challenging to process. This study explores an inductive heating concept with spray cooling for steel–aluminum specimens in a two‐step process including friction welding and cup backward extrusion.
Armin Piwek +7 more
wiley +1 more source
Synthesis and application of polyacrylate reverse demulsifier with high stability
Gongye shui chuliPolyacrylate reverse demulsifier CR-3 was synthesized with methyl methacrylate, ethyl acrylate, and styrene as monomers by aqueous polymerization method. The effects of emulsifier type, emulsifier dosage, and effective content of CR-3 on the stability of
GUO Xiaoyi +5 more
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Offshore Drilling and Energy Conservation: The Relative Impact on Gas Prices [PDF]
, 2008 This issue brief compares projected savings from drilling in presently restricted offshore zones and savings if the nation had continued adjusting fuel efficiency standards at 1980-1985 rates.
Dean Baker, Nichole Szembrot
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