Results 51 to 60 of about 237,664 (259)

Experimental study on new structure teeth in a high-temperature environment

Science Progress
In high-temperature drilling, especially in high-temperature geothermal drilling, cone bits often experience common and severe tooth loss. This issue significantly reduces the cone bit's service life and has a detrimental impact on drilling efficiency ...
Dongdong Song, Yingxin Yang, Zhangping Ren, Jian Wang, Xianzhi He, Ya Huang, Siduan Lv, Kaizhi Yang, Song Peng, Hanyu Chen   +9 more
doaj   +1 more source

Control technology of drilling fluid performance in horizontal directional crossing of Tongming Strait by product pipeline

You-qi chuyun, 2021
As the environmental protection requirements for surrounding sea areas of Tongming Strait are high, the crossing strata are complex and changeable, the underground fresh water and sea water appear alternately, the crossing section is long with large ...
Yuguang MING, Chuanfu WANG, Qiang LAN, Hui LI, Zhendong LIU, Shuquan LYU   +5 more
doaj   +1 more source

Proceedings of the Integrated Ocean Drilling Program 307: Modern Carbonate Mounds: Porcupine Drilling

, 2006
<p>Challenger Mound, a prominent mound structure covered with dead cold-water coral rubble on the southwest Irish continental margin, was the focus of 12 days of scientific drilling aboard the <em>JOIDES Resolution</em> during ...
Sasaki, Keiichi, Titschack, Jürgen, Foubert, Anneleen, Browning, Emily L., Gharib, Jamshid J., Frank, Tracy D., Bjerager, Morten, Andres, Miriam S., Li, Xianghui, Léonide, Philippe, Gaillot, Philippe, Abe, Kohei, Mangelsdorf, Kai, Huvenne, Veerle Ann Ida, Novosel, Ivana, Samarkin, Vladimir, Kano, Akihiro, Williams, Trevor, Fuwa, Yuji, De Mol, Ben, Spivack, Arthur J., Takashima, Chizura, Ferdelman, Timothy G., Cragg, Barry, Sakai, Saburo   +24 more
core   +1 more source

Shale problems and water-based drilling fluid optimisation in the Hassi Messaoud Algerian oil field [PDF]

, 2010
Drilling fluid formulation and properties play a fundamental role in drilling operations. Clay minerals behave initially as a beneficial rheological adjuvant in drilling muds.
Khodja, Mohamed, Bergaya, Faiza, Abdelbaki Benmounah, Faiza Bergaya, Jean Paul Canselier, Fourar, Karim, Karim Fourar, Malika Khodja, Nathalie Cohaut, Khodja, Malika, Benmounah, Abdelbaki, Cohaut, Nathalie, Canselier, Jean-Paul, Mohamed Khodja   +13 more
core   +1 more source

DigiChrom: A Domain Ontology for Semantic Representation of Trivalent Chromium Platings and Its Large Language Model‐Based Alignment With Multiple Mid‐Level Ontologies

Advanced Engineering Materials, EarlyView.
Digitalizing electroplating requires both domain knowledge and interoperability. This work introduces PlatOn, a domain ontology for trivalent chromium plating and coating characterization, and a hybrid pipeline that aligns it to a mid‐level reference ontology by combining eight similarity metrics with language model reasoning. Expert‐validated mappings
Janik Harter, Elena Garcia Trelles, Christoph Schweizer, Thomas Seifert, Christoph Baumer, Mahmoud Elkady, Katja Feige, Daniel Grimme, Edgar Hoffmann, Andreas Waibel, Anke Walter   +10 more
wiley   +1 more source

Key Technologies Measures for Drilling Ultra-Deep（>9 000 m）Horizontal Wells in Sichuan-Chongqing Region

Shiyou jixie
To provide experience and promote the development of deep and ultra-deep well drilling technology， taking Well SY001-H6 on the Shuangyushi structure in northwestern Sichuan Basin as an example， the characteristics of the formation and the problems ...
He Mingmin, Song Dongdong, Wang Jian, Lü Siduan, Chen Yousheng, Li Zijie, Tu Jianping   +6 more
doaj   +1 more source

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Proceedings of the Integrated Ocean Drilling Program 346: Asian Monsoon

, 2015
<p>Integrated Ocean Drilling Program (IODP) Expedition 346 drilled seven sites covering a wide latitudinal range in the body of water bordered by the Eurasian continent, the Korean Peninsula, and the Japanese Islands, as well as two closely spaced ...
Irino, Tomohisa, Zheng, Hongbo, Lee, Gwangsoo, Holbourn, Ann E., Kubota, Yoshimi, Ikehara, Ken, Clemens, Steven C., Lopes, Cristina I.C.D., Gallagher, Stephen J., Anderson, Jr., William T., Sagawa, Takuya, Xuan, Chuang, Lofi, Johanna, Sugisaki, Saiko T., Kinsley, Christopher W., Saavedra Pellitero, Mariem, Henderson, Andrew C.G., Itaki, Takuya, Murray, Richard W., Giosan, Liviu, Wan, Shiming, Brace, Bobbi J., da Costa Gurgel, Marcio H., Toucanne, Samuel, Dunlea, Ann G., Karasuda, Akinori, Bassetti, Maria A., Singh, Raj K., Ziegler, Martin, Peterson, Larry C., Dickens, Gerald R., Tada, Ryuji, Alvarez Zarikian, Carlos A., Lee, Kyung Eun   +33 more
core   +1 more source

Microstructure Modification of Additively Manufactured Mo–9Si–8B by Annealing and Its Effects on High‐Temperature Mechanical Properties

Advanced Engineering Materials, EarlyView.
Postbuild annealing systematically modifies the phase fractions and morphology of EB‐PBF processed Mo–9Si–8B. Quantitative microstructure–property correlations reveal how controlled phase evolution enhances high‐temperature compressive strength and creep resistance.
Christopher Schmidt, Yong Chen, Georg Hasemann, Benjamin Wahlmann, Carolin Körner, Manja Krüger   +5 more
wiley   +1 more source

From environmental stress to spatial expulsion - rethinking concepts of socio-spatial exclusion in later life

International Journal of Ageing and Later Life, 2018
Gerontology has a longstanding tradition of researching the relationship between older adults and their socio-spatial environments. However, environmental gerontology often shares a positivistic understanding of space as either a “prosthetic” or a ...
Anna Wanka, Thibauld Moulaert, Matthias Drilling   +2 more
doaj   +1 more source