Results 1 to 10 of about 32 (22)
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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FluidsGas-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 +4 more
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International Journal of Coal Science & TechnologyCombined 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 +7 more
doaj +3 more sources
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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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 +2 more sources
EnergiesGeothermal 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 +5 more
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Meitan kexue jishuIn 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 +5 more
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Meitan xuebaoAiming 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 +4 more
doaj +1 more source
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