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.)
GEOTECHNICAL DRILLING CO Ltd
Original Assignee
GEOTECHNICAL DRILLING CO Ltd
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
Application filed by GEOTECHNICAL DRILLING CO LtdfiledCriticalGEOTECHNICAL DRILLING CO Ltd
Priority to ES353095ApriorityCriticalpatent/ES353095A1/en
Publication of ES353095A1publicationCriticalpatent/ES353095A1/en
An apparatus for lowering or avenging groundwater, comprising a hollow drilling tool coupled to a motor suspended from a structure supported above the ground, and detent means or detent in association with the drilling tool head to firmly hold a tip of well and vertical pipe within the latter, with the lower extremity of the tip initially somewhat above the lower end of the tool. (Machine-translation by Google Translate, not legally binding)
ES353095A1968-04-241968-04-24An apparatus reduce or avenue underground waters. (Machine-translation by Google Translate, not legally binding)
ExpiredES353095A1
(en)