Results 41 to 50 of about 7,353,639 (302)

Research on Wellbore Trajectory Optimization and Drilling Control Based on the TD3 Algorithm

Applied Sciences
In modern oil and gas exploration and development, wellbore trajectory optimization and control is the key technology to improve drilling efficiency, reduce costs, and ensure safety.
Haipeng Gu, Yang Wu, Xiaowei Li, Zhaokai Hou   +3 more
doaj   +1 more source

Multi-Objective Optimization in Single-Shot Drilling of CFRP/Al Stacks Using Customized Twist Drill

Materials, 2022
In recent years, the use of CFRP with titanium and/or aluminum to form materials for stacking has gained popularity for aircraft construction. In practice, single-shot drilling is used to create perfectly aligned holes for the composite-metal stack ...
M. H. Hassan, J. Abdullah, G. Franz
semanticscholar   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

PREDICTION OF RATE OF PENETRATION (ROP) IN PETROLEUM DRILLING OPERATIONS USING OPTIMIZATION ALGORITHMS

Rudarsko-geološko-naftni Zbornik
In drilling operations, by choosing the proper tools and also incorporating more accurate and reliable parameters, this operation can be performed in less time and cost manner.
Arash Ebrahimabadi, Alireza Afradi
doaj   +1 more source

Proceedings of the Integrated Ocean Drilling Program 344: Costa Rica Seismogenesis Project, Program A Stage 2 (CRISP-A2)

, 2013
<p>The Costa Rica Seismogenesis Project (CRISP) was designed to elucidate processes that control nucleation and seismic rupture of large earthquakes at erosional subduction zones. The CRISP study area is located offshore the Osa Peninsula where the
Burkett, Ashley, Charpentier, Delphine, Sakaguchi, Arito, Vannucchi, Paola, Screaton, Elizabeth J., Petronotis, Katerina, Malinverno, Alberto, Hashimoto, Yoshitaka, Jovane, Luigi, Kutterolf, Steffen O., Saito, Saneatsu, Harris, Robert N., Diz, Paula, Hamahashi, Mari, Choi, Jiyoung, Millan, Cristina, Yan, Quanshu, Baxter, Alan T., Solomon, Evan A., Sandoval Gutierrez, Maria Isabel, Berg, Richard D., Smith-Duque, Christopher E., Martin, Kylara, Torres, Marta E., Straub, Susanne M., Heydolph, Ken, Uchimura, Hitomi, Zhao, Xixi, Yamamoto, Yuzuru, Kastner, Miriam, Tanikawa, Wataru, Kurz, Walter, Li, Yong Xiang, Nascimento, Debora B.   +33 more
core   +1 more source

High‐Temperature Phase Transformation in a V‐9Si‐6.5B Alloy: The Kinetic and Crystallographic Pathway From V5SiB2 to V8SiB4

Advanced Engineering Materials, EarlyView.
In situ synchrotron high‐energy X‐ray diffraction reveals the real‐time high‐temperature phase evolution of a ternary V‐9Si‐6.5B alloy. The study uncovers a kinetically delayed V5SiB2 → V8SiB4 transformation governed by massive structural and chemical barriers.
Zahra Sabeti, Andreas Stark, Roja Rani Korrayi, Florian Pyczak, Georg Hasemann   +4 more
wiley   +1 more source

Study of the local forces along a drill edge – comparison of two methodologies [PDF]

, 2013
In aerospace applications, drilling is one of the most common operations. However, this machining stays complex and expensive, especially in hard to cut materials. Because of the closed aspect of the operation, the measure or evaluation of the phenomenon
M'SAOUBI, Rachid, ABRIVARD, Guillaume, POULACHON, Gerard, POUTORD, Antoine, ROSSI, FREDERIC   +4 more
core  

DigiChrom: A Domain Ontology for Semantic Representation of Trivalent Chromium Platings and Its Large Language Model‐Based Alignment With Multiple Mid‐Level Ontologies

Advanced Engineering Materials, EarlyView.
Digitalizing electroplating requires both domain knowledge and interoperability. This work introduces PlatOn, a domain ontology for trivalent chromium plating and coating characterization, and a hybrid pipeline that aligns it to a mid‐level reference ontology by combining eight similarity metrics with language model reasoning. Expert‐validated mappings
Janik Harter, Elena Garcia Trelles, Christoph Schweizer, Thomas Seifert, Christoph Baumer, Mahmoud Elkady, Katja Feige, Daniel Grimme, Edgar Hoffmann, Andreas Waibel, Anke Walter   +10 more
wiley   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

Optimization of High Temperature-Resistant Modified Starch Polyamine Anti-Collapse Water-Based Drilling Fluid System for Deep Shale Reservoir

Molecules, 2022
During drilling in deep shale gas reservoirs, drilling fluid losses, hole wall collapses, and additional problems occur frequently due to the development of natural fractures in the shale formation, resulting in a high number of engineering accidents ...
Xiang-Wei Kong, Mingzhong Chen, Chao-Ju Zhang, Zuo-Cai Liu, Yanxin Jin, Xue Wang, Ming-gang Liu, Song Li   +7 more
semanticscholar   +1 more source