Boring or penetrating the earth – Cutter element laterally shiftable below ground – Cutter element shifted by fluid pressure
Patent
1979-06-18
1981-07-14
Pate, III, William F.
Boring or penetrating the earth
Cutter element laterally shiftable below ground
Cutter element shifted by fluid pressure
175284, 299 17, 299 34, E21B 926
Patent
active
042781370
ABSTRACT:
An apparatus consisting of pipe sections pivotally joined which can be insert in a borehole when in straight position and manipulated to a zigzag position to loosen minerals outside the wall of the borehole.
REFERENCES:
patent: 2450223 (1948-09-01), Barbour
patent: 2690325 (1954-09-01), Dismukes
patent: 2847189 (1958-08-01), Shook
Pate III William F.
Stamicarbon B.V.
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