îNTREPRINDEREA DE FORAJ SI LUCRARI GEOLOGICE SPECIALE
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Priority to RO105200ApriorityCriticalpatent/RO84108B1/ro
Publication of RO84108A2publicationCriticalpatent/RO84108A2/fr
Publication of RO84108B1publicationCriticalpatent/RO84108B1/ro
Flanging assembly for suspending casing and tubinsflanging assembly for suspending casing and tubing columnsfor high pressure oil or gas wells columns for high pressure oil or gas wells