Results 31 to 40 of about 857 (182)

Refined Assessment on Vortex-induced Fatigue of Deepwater Subsea Wellhead

Shiyou jixie, 2022
Subsea wellhead is the key equipment for deepwater drilling and vortex-induced fatigue failure is prone to occur under the action of ocean current.Present research mainly focuses on the global vortex-induced fatigue analysis of deepwater drilling riser ...
Huang Yi, Liu Shujie, Meng Wenbo, Liu Hexing, Li Lei, Tong Wujun, Liu Xiuquan   +6 more
doaj  

Zwitterionic Polymer P(AM-DMC-AMPS) as a Low-Molecular-Weight Encapsulator in Deepwater Drilling Fluid

Applied Sciences, 2017
In deepwater oil and gas drilling, the high-molecular-weight encapsulator aggravates the thickening of the drilling fluid at low temperatures. Therefore, it is hard to manage the downhole pressure, and drilling fluid loss occurs.
Xin Zhao, Zhengsong Qiu, Yongjun Zhang, Hanyi Zhong, Weian Huang, Zhichuan Tang   +5 more
doaj   +1 more source

THE VIOLENCE OF FULL COST RECOVERY: Financing Water Infrastructure, and the History and Future of Perpetual Crisis in Mombasa

International Journal of Urban and Regional Research, EarlyView.
Abstract Foregrounding the role of finance, this article examines the historical production and future trajectory of the urban water crisis in Mombasa. Drawing on archival research and contemporary fieldwork, it traces how principles of full cost recovery—institutionalized during the colonial period and later reworked through postcolonial ...
Joe Williams
wiley   +1 more source

Chironomid‐based summer temperature reconstruction of the Eemian–Weichselian transition at Lichtenberg, northern Germany

Boreas, EarlyView.
Understanding the temperature variability of past interglacial cycles is essential to predict future climates. We present a new summer temperature reconstruction, based on the subfossil chironomid record from a small palaeolake adjacent to the Middle Palaeolithic site of Lichtenberg, northern Germany. The record spans from the Saalian late glacial over
Sonja Rigterink, Bartosz Kotrys, Michael Hein, Xuan Li, Neda Rahimzadeh, Agnieszka Gruszczyńska, Marcel Weiss, Brigitte Urban, David Colin Tanner, Tobias Lauer, Antje Schwalb   +10 more
wiley   +1 more source

An experimental approach to assess the combined effects of multiple stressors on a large vertebrate species

Conservation Biology, EarlyView.
Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta, Catriona M. Harris, Lori H. Schwacke, Len Thomas, Jason B. Allen, Aaron A. Barleycorn, Marco Casoli, Jonathan Crossman, Laura Aichinger Dias, Laura Engleby, Erin LaBrecque, Jenny A. Litz, Katherine A. McHugh, Patrick J. O. Miller, Michael J. Moore, Theoni Photopoulou, Brian M. Quigley, Cynthia R. Smith, Brandon L. Southall, Todd R. Speakman, Ryan Takeshita, Christina N. Toms, Randall S. Wells, Eric S. Zolman, Peter L. Tyack   +24 more
wiley   +1 more source

The quantitative description of gas-cut degree in deepwater drilling

Petroleum Exploration and Development, 2016
Through the analysis of gas-cut features in deepwater drilling and shortages of existing gas-cut detection methods, the feasibility of early detection of gas cut at the bottom of riser was demonstrated, and a method was proposed for quantitative ...
Yuqiang XU, Zhichuan GUAN, Huizeng ZHANG, Hongning ZHANG   +3 more
doaj   +1 more source

Wellbore multiphase flow behaviors during gas invasion in deepwater downhole dual-gradient drilling based on oil-based drilling fluid

Energy Reports, 2022
Knowledge of wellbore multiphase flow characteristics is important for early gas invasion identification and treatment, especially in oil-based drilling fluid.
Hongwei Yang, Jun Li, Geng Zhang, Hui Zhang, Boyun Guo, Wang Chen   +5 more
doaj   +1 more source

CFO overconfidence, environmental violations, and firm performance. The moderating role of constituency statutes

European Management Review, EarlyView.
Abstract This study examines the relationship between Chief Financial Officer (CFO) overconfidence and firm performance through the lens of environmental violations and constituency statutes. Drawing on stakeholder and upper echelons theories, we find that firms with overconfident CFOs are more likely to commit environmental violations, which ...
Panagiotis Andrikopoulos, Shee‐Yee Khoo, Patrycja Klusak, Yurtsev Uymaz, Huong Vu   +4 more
wiley   +1 more source

Numerical Investigation of Wellbore Stability in Deepwater Shallow Sediments

Geofluids, 2021
An elaborate poro-elastoplastic numerical model has been developed in this paper to explore the stability characteristics of wellbore in shallow sediments of deepwater oil/gas wells.
Wei Liu, Hai Lin, Hailong Liu, Chao Luo, Guiping Wang, Jingen Deng   +5 more
doaj   +1 more source

Reengaging Criminology in Regulation and Governance: A Synergistic Research Agenda on Regulatory Guardianship

Regulation &Governance, EarlyView.
ABSTRACT Recent literature calls for scholars to bridge the divide that has emerged between criminology and regulation and governance. In the current work, we propose that criminological opportunity theories provide one fruitful pathway to that end.
Carole Gibbs, Fiona Chan, Rachel Boratto, Tyler Hug   +3 more
wiley   +1 more source