Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US05/911,016external-prioritypatent/US4255798A/en
Priority claimed from NO782193Aexternal-prioritypatent/NO157197C/no
Publication of NO823351LpublicationCriticalpatent/NO823351L/no
Application filed by Schlumberger LtdfiledCriticalSchlumberger Ltd
Priority to NO823351ApriorityCriticalpatent/NO166016C/no
Publication of NO166016BpublicationCriticalpatent/NO166016B/no
Publication of NO166016CpublicationCriticalpatent/NO166016C/no