bha 100 and advanced into borehole 210 in a preferred embodiment the wbs tool comprises a thermal melting system or rock melting penetrator the wbs tool heats the formation walls to temperatures in excess of 1400 u00b0 c to ensure a thorough melt this action provides a u201c casing effect u201d for the wellbore it allows subsequent trips into the wellbore without the threat of the formation collapsing into the wellbore the melt is preferably performed on the area from the surface to the bottom of the wellbore in a preferred embodiment the melt may enlarge the drilled wellbore by 5 8 mm providing unhindered access to the borehole during subsequent operations once completed the wbs tool is retracted and decoupled from bha 100 rock melting also may solidify any cuttings that are left in the bottom of the hole for example see u s pat no 4 136 524 and u201c rapid excavation by rock melting lasl subterrene program september 1973 june 1976 u201d by r j hanold la 5979 sr status report los alamos scientific laboratory of the university of california february 1977 both of which are incorporated herein by reference wellbore stabilization is preferably employed in remote drilling.