Results 21 to 30 of about 168,493 (174)

Crevice Corrosion Study of SAF 3207 HD in 6% FeCl3 Solution using Polarization, Weight Loss, and Electrochemical Impedance Spectroscopy Methods

open access: yesInternational Journal of Technology, 2016
Hyperduplex Stainless Steel 3207 (SAF 3207 HD) is one of the materials used in the oil and gas industry, especially for umbilical, which is a system to connect cables or instrumental setups between control platforms and wellhead station.
Rini Riastuti   +2 more
doaj   +1 more source

A Study on the Problem of AC Corrosion of Power Umbilical Cables Caused by Electromagnetic Induction Phenomena

open access: yesEnergies
During the normal laying and operation of a three-core umbilical cable, AC current can easily lead to AC electrochemical corrosion on the outer surface of the steel tube.
Pengjin Shao   +5 more
doaj   +1 more source

Control system of ROV for underwater safety inspection and operation

open access: yesZhongguo 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   +4 more
doaj   +1 more source

An Experimental Assessment of the Hysteresis Behavior of Umbilical Cables Under Cyclic Traction

open access: yes, 2017
Umbilical cables are composed by several internal components helically disposed and externally protected by an outer polymeric sheath. With these elements wound in different directions, internal friction is a well-known structural feature, originating ...
Guilherme R. Franzini   +5 more
core   +1 more source

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

open access: yesIEEE 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

A Triboelectric‐Hydrogel System for Mechano‐Metabolic Re‐Coupling in Skin Expansion: Recharging From Energy Crisis

open access: yesAdvanced Healthcare Materials, EarlyView.
Progressive skin expansion creates an energy crisis that compromises regenerative capacity. A self‐powered triboelectric‐hydrogel system (TP‐PAM/G) re‐couples mechanical loading with cellular metabolism by combining motion‐generated electrical stimulation and stress redistribution.
Xing Huang   +10 more
wiley   +1 more source

Cálculo de parâmetros elétricos série de cabos umbilicais [PDF]

open access: yes, 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  

The effects of kinematic condensation on internally resonant forced vibrations of shallow horizontal cables [PDF]

open access: yes, 2007
This study aims at comparing non-linear modal interactions in shallow horizontal cables with kinematically non-condensed vs. condensed modeling, under simultaneous primary external and internal resonances.
Narakorn Srinil   +5 more
core   +4 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

open access: yesIEEE 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   +7 more
doaj   +1 more source

Extrusion‐Based Bioprinting of Living Bioinks for Tissue and Organ Engineering

open access: yesAdvanced Materials Technologies, EarlyView.
Extrusion‐based bioprinting is presented as the most versatile route for fabricating living, heterogeneous tissues. Its ability to combine diverse bioinks, support matrices, and advanced printhead geometries transforms familiar constraints into powerful biofabrication opportunities.
Eric Silberman   +4 more
wiley   +1 more source

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