Results 21 to 30 of about 134,603 (177)

Effect of Al2O3 particles on the adhesion, wear, and corrosion performance of epoxy coatings for protection of umbilical cables accessories for subsea oil and gas production systems

Journal of Materials Research and Technology, 2019
Umbilical cables accessories of subsea oil and gas production systems are exposed to very high mechanical stresses, abrasive wear, and continuous electrolyte action in submerged condition.
Jhonny Dias Oliveira, Renan Carreiro Rocha, André Gustavo de Sousa Galdino   +2 more
doaj   +1 more source

Automatic Filling Optimization Design of Filler Bodies in Umbilical Cross-Section Based on Quasi-Physical Algorithm

Shanghai Jiaotong Daxue xuebao
As a key component in the subsea production system for oil and gas exploitation, a marine umbilical consists of optical cables, electrical cables, steel tubes, and filler bodies.
YIN Xu, CAO Donghui, TIAN Geng, YANG Zhixun, FAN Zhirui, WANG Gang, LU Yucheng, WANG Hui
doaj   +1 more source

Control system of ROV for underwater safety inspection and operation

Zhongguo Jianchuan Yanjiu, 2018
[Objectives] In order to achieve safety inspections for surface attachments on hulls, dams and underwater steel structures according to the requirements of removing attachments,a new Remotely Operated Vehicle(ROV) equipped with cables for underwater ...
ZHANG Guangyi, ZENG Qingjun, DAI Xiaoqiang, ZHU Chunlei, LING Hongjie   +4 more
doaj   +1 more source

AWUCD-Net: The Armored Wire Umbilical Cable Surface Defect Detection Algorithm Based on Improved YOLOv7

IEEE Access
When armored wire umbilicals are used for launching and recovering the seafloor drill, they need to be detected for defects to prevent accidents. Existing wire rope non-destructive detection methods are susceptible to interference, low efficiency, high ...
Du Chen, Yongping Jin
doaj   +1 more source

Prediction of the temperature distribution of partially submersed umbilical cables [PDF]

Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2012
The objective of this work is to predict the temperature distribution of partially submersed umbilical cables under different operating and environmental conditions. The commercial code Fluent® was used to simulate the heat transfer and the air fluid flow of part of a vertical umbilical cable near the air-water interface.
Krieger, Guenther Carlos, Yanagihara, Jurandir Itizo   +1 more
openaire   +3 more sources

Conceptualization and Experimental Verification of a 50 kW 600 V/4 kV/600 V DC Power Supply System for Ultra-Deep-Sea HyDrones

IEEE Access
Remotely operated underwater vehicles (ROVs) are crucially important in deep-sea exploration. Today, ROVs are typically supplied from a surface vessel via a medium-voltage (MV) 50 Hz/60 Hz ac umbilical.
David Menzi, Bhagyalakshmi Kakarla, Alexandre Capaul, Marcel Frei, Igor Dorrestijn, Johannes Singer, Johann W. Kolar, Jonas Huber   +7 more
doaj   +1 more source

A Blood‐Derived Factor Rescues ALS: Platelet Factor 4 Activates OPTN‐Dependent Autophagy to Clear SOD1 Aggregates Independently of PINK1

Advanced Science, EarlyView.
Systemic platelet factor 4 (PF4) is significantly depleted in amyotrophic lateral sclerosis (ALS). Peripheral PF4 replenishment restores central proteostasis by driving OPTN‐dependent, PINK1‐independent selective autophagy in motor neurons. This intervention effectively clears toxic SOD1 aggregates, blunts glial activation, and preserves neuromuscular ...
Qingjian Xie, Yanbo Zhu, Wenhua Jiang, Haobo Xie, Yaojia Li, Mengjie Hu, Kezheng Li, Huan Yu, Yixuan Pan, Chaoyi Jiang, Xueqin Song, Dongsheng Fan, Binbin Deng   +12 more
wiley   +1 more source

Cálculo de parâmetros elétricos série de cabos umbilicais [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Elétrica, Florianópolis, 2013Os cabos umbilicais são uma parte importante do sistema de transmissão de energia subaquático.
Percebon, Leandro Alberto
core  

Pipeline Systems in Floating Offshore Production Systems: Hydrodynamics, Corrosion, Design and Maintenance

Journal of Marine Science and Engineering
Floating offshore production systems play a critical role in offshore resource development, where the structural integrity and operational safety of risers, umbilical cables, and mooring cables are of paramount importance.
Jin Yan, Yining Zhang, Zehan Chen, Pengji Li, Yuting Li, Zeyu Cao, Jiaming Wu, Kefan Yang, Dapeng Zhang   +8 more
doaj   +1 more source

Liquid Gallium Nanozyme Coatings Enable Sustained Nitric Oxide Generation With Antioxidant and Anti‐Inflammatory Functions

Advanced Science, EarlyView.
Liquid gallium (Ga) acts as a catalytic center for nitric oxide (NO) generation within a tannic acid–zirconium metal–phenolic network coating. Stabilized Ga nanoparticles catalyze S‐nitrosothiol decomposition through surface electron transfer, enabling controlled NO production, enhancing endothelial biocompatibility, and providing antioxidant and anti ...
Franco Centurion, Kang Lin, Shu Geng, Siti Nur Asyura Adzlan, Qingqing Fan, Federico Mazur, Ravindra Kokate, Priyank Kumar, Christina Cortez‐Jugo, Frank Caruso, Rona Chandrawati   +10 more
wiley   +1 more source