Electric Discharge in Erupting Mud
Geophysical Research Letters, 2022 Self‐ignition during the explosive eruption of mud volcanoes can create flames that in some cases reach heights that exceed hundreds of meters. To study the controls on electrical discharge in natural mud, we performed laboratory experiments using a ...
C. Springsklee +4 more
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Frontiers in Earth Science, 2023 Mud volcanoes (MVs) are surface structures typically created by episodic discharge of fluids and solids, often associated to onshore and offshore accretionary prisms on convergent plate boundaries.
Mechthild Doll +6 more
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Recent, deep-sourced methane/mud discharge at the most active mud volcano in the western Mediterranean [PDF]
Marine Geology, 2019 This work was supported by MINECO Spanish Projects [CTM2009-07715, CGL2011-1441, CGL2012-32659 and CGL2015-66830-R]; and the Andalusian Government Research Group [RNM-179 and RNM-215]. C. F. López-Rodríguez was funded by a JAE-PhD fellowship from the CSIC (Spain); she acknowledges subsequent funding from the STSM in the framework of COST action ES1301.
Fernando Nieto +2 more
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Sustained abstinence after a methamphetamine-specific treatment program for pregnant and parenting women [PDF]
Scientific ReportsThe treatment of methamphetamine use disorder (MUD) poses a significant challenge due to high rates of treatment discontinuation, substance use recurrence, and socioeconomic adversity. ‘Mummy, think of me’ (MAMADAM, an acronym from the German “Mama, denk
Maximilian Pilhatsch +5 more
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Two methods for simulating mud discharge after emergency disconnection of a drilling riser [PDF]
Journal of Natural Gas Science and Engineering, 2016 Abstract In marine floating drilling, emergency disconnection of a drilling riser is required in harsh environments or loss of dynamic positioning control. After disconnection, drilling mud in the riser discharges directly from the riser bottom, and seawater refills the vacancy emptied out after mud falling through refill valves.
Chaowei Li
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EXPERIMENTAL STUDY OF DISCHARGE DIFFUSION OF DRILLING MUD INTO THE SEA
土木学会論文集表層型メタンハイドレート（MH）の採掘計画では，掘削時の不要泥水を掘削跡窪地へ海中排出することを計画している．本研究では，海中排出時の泥水拡散状況把握のため，窪地を再現した形状の水槽を用いて，模擬深海底泥（中国カオリン）による泥水の連続長時間投入を模擬した実験，および日本海側のMH賦存サイト海底から採取した深海底泥による泥水投入実験を実施した．また密度流モデルによる数値解析を実施し投入泥水の挙動把握を行った．その結果，連続長時間投入では密度流的な拡散が支配的となる傾向が確認された．また，同濃度条件においてMH賦存サイトの深海底泥による泥水の方が投入時流速が大きく，投入後の濁りの長期化の傾向が確認された．これらの特性は，含有される粘土鉱物や強熱減量にみられる有機分の含有に影響されることが示唆された．
Akiyuki Ukai
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Recycling treatment of waste oil-based drilling mud in gas fields [PDF]
Scientific ReportsThis study aims to develop an efficient and environmentally friendly approach for the resource recovery and harmless treatment of waste oil-based drilling mud (WOM).
Hailong Cao, Boyang Hu
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Mathematical model of velocity and distribution law in gas lift reverse circulation well washing flow field for drilling shaft sinking [PDF]
Scientific ReportsTo reveal the velocity distribution law of a gas lift reverse circulation well washing flow field in drilling shaft sinking, a velocity mathematical model of well washing flow field is established.
Longhui Guo +5 more
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CFD–DEM method is used to study the multi-phase coupling slag discharge flow field of gas-lift reverse circulation in drilling shaft sinking [PDF]
Scientific ReportsTo elucidate the distribution law of the multiphase coupling slag discharge flow field in gas-lift reverse circulation during drilling shaft sinking, a numerical analysis model of gas–liquid–solid multiphase coupling slag discharge was established by CFD–
Longhui Guo +5 more
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Recoil Control of Deepwater-Drilling Riser with Optimal Guaranteed Cost H∞ Control
Applied Sciences, 2022 In deepwater-drilling engineering, it is necessary to disconnect the bottom equipment of the lower marine-riser package from the blowout preventer when encountering multi-hazard environmental factors.
Yue-Ting Sun +4 more
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