Apparatus for extracting minerals through a borehole
Patent
·
OSTI ID:5714972
An apparatus is described for extracting minerals through a borehole. Pivotally jointed sections of pipe, when in the straight position, are contained within a sleeve fitting inside the borehole. This sleeve is provided with one or more lateral slots through which the sections can project outside the sleeve so as to be disposed in a zigzag by means cooperating with the sleeve that are capable of exerting an axial force on the extreme sections. The middle one of these sections is connected to the sleeve by means of a pivot that can move along the axis of the sleeve, so that the sections will always project equally far on either side. The slots may be made so long as to allow the middle section to take up a position almost normal to the sleeve. The means for loosening the mineral may be bits provided at the joints of the sections. Since a flushing liquid is needed to remove the loosened mineral through the borehole, nozzles for liquid are provided at the joints of the sections. Since a flushing liquid is needed to remove the loosened mineral through the borehole, nozzles for liquid are provided at the joints to loosen the mineral by means of a jet action. 12 claims.
- Assignee:
- Stamicarbon BV
- Patent Number(s):
- US 4278137
- OSTI ID:
- 5714972
- Country of Publication:
- United States
- Language:
- English
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