PIPE COLUMN FOR DRILLING WITH CONVEYING CORE BY ASCENDING FLOW OF CLEANING AGENT
KARPUNIN A.A.,SU, MELNIK E.D.,SU, KUZMIN I.V.,SU, PESHKOV A.N.,SU, KARDYSH V.G.,SU
Year of Publication 23.01.1985
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Year of Publication 23.01.1985
Patent
DRILL BIT
SMIRNOV O.V.,SU, MELNIK E.D.,SU, KUZMIN I.V.,SU, PESHKOV A.N.,SU, MARKOV N.N.,SU, KARDYSH V.G.,SU
Year of Publication 23.01.1987
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Year of Publication 23.01.1987
Patent