positioned within firing pin housing 87 a firing pin blocking plate 89 normally blocks firing pin 84 from upward movement firing pin blocking plate 89 is maintained in its blocking position via a release rod 91 upon upward movement of release rod 91 aperture 93 in blocking plate 89 centers around firing pin 84 thereby freeing firing pin 84 to move upwardly under force of compression spring 85 as mentioned briefly above the depth locator 68 preferably includes an angled end surface 66 which cooperates with the matingly angled end surface 53 of the drill shoe 20 once the device 68 is in position in the casing 12 a plurality of radially extending horizontal borings can be made into the earth strata by adjusting the angular position of the angular locator 60 relative to the shoe 20 it being contemplated that the shoe 20 and locator 60 would have a plurality of locating pins 64 positioned at for example 5 u00b0 to 10 u00b0 increments thus with each 5 u00b0 or 10 u00b0 readjustment of locator 60 relative to shoe 20 the shoe 20 can bore a new radial path radially outwardly from the casing 12 but at a known increment relative to the previous boring if desired the shoe 20 and locator 60 can be repeatedly readjusted to drill radially outwardly from the well casing 12 in a full 360 u00b0 circle referring still to fig5 and 6 there is illustrated a tool.