Composition Optimization of Glass-Like Casing and Its Novel Application in Mending Instable Borehole Wall

Figure 6

Experimental photos of the glass-like casing, (a) and (b) composition used in granite, heating up to 700°C, and (c) and (d) composition used in soil, heating up to 700°C.

(a)

(b)

(c)

(d)