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pro vyhledávání: '"Shanxun Tao"'
Publikováno v:
Underground Space, Vol 6, Iss 3, Pp 316-328 (2021)
Dual-gradient drilling technology is being increasingly used in formations with narrow pressure margins. For dual-gradient drilling based on downhole separation, hollow spheres are separated into the annulus at the separator position, resulting in va
Externí odkaz:
https://doaj.org/article/a4127c71a3a649baafedbfd230b117fa
Publikováno v:
Underground Space, Vol 6, Iss 3, Pp 316-328 (2021)
Dual-gradient drilling technology is being increasingly used in formations with narrow pressure margins. For dual-gradient drilling based on downhole separation, hollow spheres are separated into the annulus at the separator position, resulting in va