Rock melting tool with annealer section

Details Rock melting tool with annealer section Rock melting tool with annealer section

1996-08-21

1998-04-07

Bagnell, David J.

Boring or penetrating the earth

Boring by directly applying heat to fluidize or comminute

175 16, 299 14, E21B 714, E21C 3716

Patent

active

057353557

ABSTRACT:
A rock melting penetrator is provided with an afterbody that rapidly cools a molten geological structure formed around the melting tip of the penetrator to the glass transition temperature for the surrounding molten glass-like material. An annealing afterbody then cools the glass slowly from the glass transition temperature through the annealing temperature range to form a solid self-supporting glass casing. This allows thermally induced strains to relax by viscous deformations as the molten glass cools and prevents fracturing of the resulting glass liner. The quality of the glass lining is improved, along with its ability to provide a rigid impermeable casing in unstable rock formations.

REFERENCES:
patent: 3693731 (1972-09-01), Armstrong et al.
patent: 5168940 (1992-12-01), Foppe
Magazaine Article, "Mineral Industry News" pp. 8,10, Jun. 1973.

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