Pressure differential mining tool

Details Pressure differential mining tool Pressure differential mining tool

1984-03-12

1986-03-11

Novosad, Stephen J.

Mining or in situ disintegration of hard material

Processes

Breaking down by direct contact with fluid

175 67, 175215, E21C 3706

Patent

active

045751552

ABSTRACT:
A pressurized fluid is injected into a subterranean cavity in a mineral deposit to support the overburden during hydraulic mining operations. A dynamic seal between the drill string and a surrounding casing retains fluid pressure within the cavity as the drill string rotates during mining operations. A blowout protector retains fluid pressure within the cavity while the drill string is raised or lowered within the cavity when it is necessary to add or remove drill string sections.

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