Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Neyrpic SA
Original Assignee
Neyrpic SA
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Filing date
Publication date
Application filed by Neyrpic SAfiledCriticalNeyrpic SA
Priority to ES0235284ApriorityCriticalpatent/ES235284A1/en
Publication of ES235284A1publicationCriticalpatent/ES235284A1/en
Improvements in the construction of rotary perforators, characterized in that the inside of the perforator tube is put in communication with the annular space comprised between the rotary perforator and the perforated well, by means of a step carried out in a fixed part of the turbine. (Machine-translation by Google Translate, not legally binding)
ES0235284A1957-05-071957-05-07Improvements in the construction of rotary drills (Machine-translation by Google Translate, not legally binding)
ExpiredES235284A1
(en)