Results 1 to 10 of about 838 (175)

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 Reports
To 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, Hua Cheng, Zhishu Yao, Chuanxin Rong, Zongjin Wang, Xiaoyun Wang   +5 more
doaj   +7 more sources

Mathematical model of velocity and distribution law in gas lift reverse circulation well washing flow field for drilling shaft sinking [PDF]

Scientific Reports
To 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, Hua Cheng, Zhishu Yao, Chuanxin Rong, Jian Lin, Xiaoyun Wang   +5 more
doaj   +7 more sources

Research and Application of Gas-lift Reverse Circulation Drilling Technology to Geothermal Well Construction in Dalian Jiaoliu Island

Procedia Engineering, 2014
AbstractThis paper describes the principle of air-lift reverse circulation drilling, and its process feature, equipment selection, drilling assembly, drilling parameters and technical measures. Using the air-lift reverse circulation drilling, combined with geothermal well construction project in Dalian, a good solution was presented to the hole wall's ...
Xiumin, Ma, Yue, Chen, Luheng, Qi
exaly   +4 more sources

Pressure distribution and fluid migration law of gas lift reverse circulation well washing flow field in drilling sinking [PDF]

Meitan kexue jishu
In order to reveal the pressure distribution and fluid migration law of the gas lift reverse circulation washing flow field in drilling method, the ø5m advanced drilling of the north wind well in Taohutu coal mine was taken as the research background ...
Longhui GUO, Hua CHENG, Zhishu YAO, Chuanxin RONG, Jian LIN, Zongjin WANG   +5 more
doaj   +2 more sources

Air-Lifting Reverse-Circulation Drilling in Deep Geothermal Wells and the Effect of Dual-Wall Drill Pipe Depth Down the Hole

Energies
Geothermal energy is a renewable energy source that is rich in reserves, widely distributed, stable and reliable. The development of geothermal energy needs to be carried out by drilling wells to exploit the underground thermal fluid, and air-lift ...
Hongyu Ye, Ziwei Lai, Longjun Tian, Renjie Zhang, Bin Liu, Xiuhua Zheng   +5 more
doaj   +2 more sources

Study on the flow field of multi-phase coupling slag discharge and the influencing factors of slag discharge effect in gas lift reverse circulation of drilling shaft sinking

International Journal of Coal Science & Technology
Combined with the advanced drilling of the central return air shaft in Kekegai Coal Mine, the distribution law of slag discharge flow field by drilling method and the influencing factors of slag discharge effect are studied.
Longhui Guo, Hua Cheng, Zhishu Yao, Chuanxin Rong, Guang Yang, Xiaoyun Wang, Yu Fang, Bao Xie   +7 more
doaj   +2 more sources

Research on the gas-liquid-solid coupled slag discharge flow field and optimization of cutterhead slag suction port in shaft drilling [PDF]

Meitan xuebao
Aiming at the problems of gas lift reverse circulation shaft washing slag discharge and low drilling efficiency in the application of vertical shaft drilling method in the Jurassic strata coal mines in western China, taking ϕ4.2 m advanced drilling of ...
Hua CHENG, Longhui GUO, Zhishu YAO, Guang YANG, Chuanxin RONG   +4 more
doaj   +2 more sources

A Calculation Method and Application Research in Gas-Lift Reverse Circulation Bottom-Hole Pressure Based on Gas–Liquid Two-Phase Flow Theory

Fluids
Gas-lift reverse circulation drilling technology is one of the typical “bottom-hole negative pressure” drilling technologies. This technology can significantly reduce wellbore circulation pressure loss, alleviate the bottom-hole pressure holding effect ...
Pu Liu, Chuanhua Ge, Ruiqi Zhang, Ruifeng Tan, Shanquan Fan   +4 more
doaj   +1 more source

Biotechnological aspects of sulfate reduction with methane as electron donor

, 2010
Biological sulfate reduction can be used for the removal and recovery of oxidized sulfur compounds and metals from waste streams. However, the costs of conventional electron donors, like hydrogen and ethanol, limit the application possibilities.
Meulepas, Roel J.W., Piet N. L. Lens, Alfons J. M. Stams, Stams, Alfons J.M., Roel J. W. Meulepas, Stams, A.J.M., Meulepas, R.J.W., Lens, P.N.L., Lens, Piet N.L.   +8 more
core   +1 more source

Cyclic azapeptide CD36 ligand attenuates cardiac injury and reduces long‐chain fatty acid accumulation after myocardial ischemia–reperfusion in mice

FEBS Open Bio, EarlyView.
In a murine model of myocardial ischemia and reperfusion (MI/R), the CD36 azapeptide ligand MPE‐298 reduces cardiac injury and transiently lowers left ventricular long‐chain fatty acids (LCFAs) accumulation 3 h after reperfusion, accompanied by a decrease of oxidative stress and inflammation‐associated genes' expression in the heart and adipose tissue.
Jade Gauvin, Naghme Radmannia, David N. Huynh, Liliane Ménard, Caroline Daneault, Maïté Veilleux, Ahsanullah Ahsanullah, André C. Carpentier, William D. Lubell, Matthieu Ruiz, Huy Ong, Sylvie Marleau, Simon‐Pierre Gravel   +12 more
wiley   +1 more source