Mining perforation and exploitation procedure for mud exploitation or aqueous suspension of granular mineral from a deep well. (Machine-translation by Google Translate, not legally binding)

摘要

Drilling and mining operation for the exploitation in sludge or aqueous suspension of granular mineral from a deep well, in which procedure is used an apparatus that includes one or more nozzles of mining exploitation; an eductor nozzle; and a foot valve in a string of tubes having a liquid inlet duct and an aqueous suspension discharge duct, the pipe string defining a pressure zone of the system above the foot valve and a pressure zone of the cavity below the foot valve, whose pressure varies from slightly below the installation pressure to reach the pressure of the cavity, depending on the speed and position of the foot valve. (Machine-translation by Google Translate, not legally binding)