Results 31 to 40 of about 180,798 (213)

Study on Opening Determining and Parameter Optimization of Booster Line for Deepwater Drilling

Shiyou jixie, 2021
During deepwater drilling, when drilling fluid returns from the casing annulus to the riser section, due to the sudden increase of the size of the riser section annulus, the velocity of the drilling fluid decreases and the cutting carrying efficiency ...
Liu Hexing, Li Lei, Dou Liangbin, Zhang Ming, Zhao Kai, Sun Hengbin   +5 more
doaj  

Investigation of jack-up leg extension for deep water operations

International Journal of Naval Architecture and Ocean Engineering, 2015
Since the first jack-up was built, jackups have become the most popular type of mobile offshore drilling unit (MODU) for offshore exploration and development purposes in shallow water.
Yousri M.A. Welaya, Ahmed Elhewy, Mohamed Hegazy   +2 more
doaj   +1 more source

Influence of Auxiliary Pipelines of the Deepwater Drilling Riser on the Dynamic Characteristics of the Subsea Wellhead

Journal of Marine Science and Engineering, 2023
During deepwater drilling, the subsea wellhead will be subjected to dynamic loads transmitted from the marine environment, floating drilling platform, riser, and blowout preventer (BOP).
Jinduo Wang, Yanbin Wang, Deli Gao, Rui Li, Liurui Guo   +4 more
doaj   +1 more source

Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime [PDF]

, 2008
Publisher version : http://iopscience.iop.org/0022-3727/41/15/155502/Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets.
SCHNEIDER, Matthieu, BERTHE, Laurent, FABBRO, Rémy, MULLER, Maryse   +3 more
core   +1 more source

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  

Study on Flow Regulation and Bottom Hole Pressure Control of RMR System under Normal Working Conditions

Shiyou jixie, 2022
For lack of deepwater drilling technology and theory, riseless mud recovery system(RMR)is difficult to meet practical requirements. Therefore, according to the double gradient drilling principle of RMR system, the control equation of bottom hole pressure
Zhang Jie, Wang Zhiheng, Li Xin, Li Cuinan, Li Rongxin, Sun Ruitao   +5 more
doaj  

Risk-based Reliability Assessment of Subsea Control module for Offshore Oil and Gas production [PDF]

, 2014
Offshore oil and gas exploitation is principally conducted using dry or wet tree systems, otherwise called the subsea Xmas tree system. Due to the shift to deeper waters, subsea production system (SPS) has come to be a preferred technology with ...
Umofia, Anietie Nnana
core   +5 more sources

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

Hawaii Scientific Drilling Project 1993 [PDF]

, 1994
Content: Project Summary, History of Hawaii Project, Permit History, Continental Scientific Drilling Office's Role, Setup and Coring of Kahi Puka Site, Downhole Problems, Cures for Problems, Conclusions, Appendices: Correspondence for Increase in Depth ...

core   +3 more sources