[seahorserocker]

I tried to use this to drill a well some years ago on the west coast of Florida near the ocean. Worked great through the sand about 20 feet. Then we hit a shale deposit. There was no getting through it. Some pro well drillers came and couldn't make it through either. The neighbor drilled his own well a couple years prior and told us the secret. Blasting caps. We gave up.

[tomcam]

The good news is that the shale was determined to be frackable, so you were able to sell hundreds of thousands of barrels of oil and drive to Beverly Hills in your ancient jalopy

[YeBanKo]

Blasting cap on the drill bit?

[Arrath]

Usually you pull your spendy drill string out of the ground then lower a charge down the hole to fracture whatever layer is giving you trouble. Turning your drill bit into a fragmentation grenade tends not to be overly productive.