Results 51 to 60 of about 181,748 (215)

Boron Isotope Evidence for Reduced Ventilation of the Deep Arctic Ocean During the Last Glacial Period

Paleoceanography and Paleoclimatology, Volume 41, Issue 9, September 2026.
Abstract Understanding the ventilation of the deep ocean, where most ocean carbon is stored, is essential to understanding how changes to ocean carbon budgets contribute to climate change. In the Arctic Ocean, shifts in ice cover, stratification and temperature are likely to impact carbon sequestration in the ocean interior.
Jesse R. Farmer, Bärbel Hönisch, Jannik Martens, Matt O’Regan   +3 more
wiley   +1 more source

Dynamic Seal Test of Deepwater Drilling Riser Telescopic Joint

Shiyou jixie, 2018
According to the main function and working conditions of the deepwater drilling riser telescopic joint, the dynamic sealing test was conducted using the 1:3 drilling riser telescopic joint prototype.
Zhang Caiying, Lei Guangjin, Liu Hongliang, Wang Bingwu, Chen Caihu, Huang Ping   +5 more
doaj  

Gas kick and lost circulation risk identification method with multi-parameters based on support vector machine for drilling in deep or ultradeep waters

Engineering Science and Technology, an International Journal
In deepwater and ultra-deepwater drilling, formation pressures are complex and the drilling fluid density window is narrow, which makes it prone to well control incidents such as kicks and lost circulation.
Kai Feng, Shujie Liu, Zhiming Yin, Yi-long Xu, Meipeng Ren, Deqiang Tian, Bangtang Yin, Baojiang Sun   +7 more
doaj   +1 more source

PRESSURE PREDICTION AND UNDERBALANCED DRILLING IN THE DEEPWATER NIGER DELTA [PDF]

, 2012
The mechanisms that cause overpressure can be broadly classified into two categories: loading and unloading. This study looks at eight wells from the deepwater Niger Delta; the wells were evaluated with three aims in mind. The first aim was to determine
GOODWYNE, OLAR,KAMAL
core  

Adaptive Responses of Tropical Crops: A Multi‐Scale Omics Integrated Perspective

Advanced Science, Volume 13, Issue 47, 24 August 2026.
Tropical crops integrate genomic, morphological, physiological, and ecological adaptations to thrive under extreme and variable environments. This review highlights how natural selection, domestication, and breeding shape stress resilience, resource‐use strategies, and productivity in sugarcane, banana, cassava, rubber and oil palm, offering new routes
Peilin Wang, Chenhui Li, Dongjiao Wang, Qibin Wu, Zhen Zeng, Huiming Guo, Han Cheng, Songbi Chen, Hongxing Cao, Hongmei Cheng, Jianghui Xie, Youxiong Que   +11 more
wiley   +1 more source

Deepwater Managed Pressure Drilling Applications

, 2010
The growing interest in deepwater exploration drilling in the Asia Pacific region has resulted in the first exploration wells being drilled in the deepwater area's of South East Asia.
Steve Nas
core   +1 more source

Coastal Marine Carbon and Air‐Sea Fluxes Quantified From pH Sensors on an Extended AUV Deployment

Journal of Geophysical Research: Oceans, Volume 131, Issue 8, August 2026.
Abstract For the first time, the Autosub Long Range (ALR) completed a fully autonomous, long‐distance (2,000 km) scientific mission, delivering new insight into coastal carbonate dynamics and air‐sea CO2 ${\text{CO}}_{2}$ fluxes. Equipped with a suite of oceanographic sensors, including a Lab‐on‐Chip (LOC) pH sensor and a Sea‐Bird SeaFET pH sensor, the
Emily M. Hammermeister, Cathy Wimart‐Rousseau, Stathys Papadimitriou, Pablo Trucco‐Pignata, Edward Chaney, Robert Templeton, Alexander B. Phillips, Socratis Loucaides   +7 more
wiley   +1 more source

Development and Application of the Modularized Ground Test Equipment System for Deep Water Test

Shiyou jixie, 2016
The ground test processes of deepwater testing operation have the issues like high cost,large space needed on drilling platform,lowering the drilling efficiency.Through deepwater testing process modularization design and independent research and ...
Jin Shukai, Zhang Chong, Meng Wenbo, Wang Erjun, Tian Xiangdong, Wei Jianfei   +5 more
doaj  

Riverine Biogeochemical Exports From Major Watersheds to the Northwest Patagonian Estuarine Network

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 8, August 2026.
Abstract River discharge considerably influences marine ecosystems through hydrological and biogeochemical drivers. Measuring baseline variability of riverine inputs, and their relation to anthropogenic land‐use impacts and global climate stressors affecting watersheds is therefore crucial for managing coastal marine ecosystems.
Sage Fox, Jorge León‐Muñoz, Brian Reid, Anna Astorga‐Roine, Rodrigo Aguayo, Paulo Moreno‐Meynard, Lydia Blanchet, David E. Butman   +7 more
wiley   +1 more source

Recent deepwater drilling technologies

Journal of the Japanese Association for Petroleum Technology, 2009
Deepwater drilling technology study group in the Drilling Technology Committee of JAPT is participated by a number of members and positively performing its activities including information research, internal studies and publicity of those study results via JAPT web-site.
openaire   +2 more sources