I did extensive research on this for years now and just have to do it and getting a great price. The owner of this Drilling company has been doing this for 50+ years with a stable work crew. He and his crew are very experienced in Drilling and Fracking especially in this aera.
This Hydrofracking is done with a Packing Bladder placed up to 40' below the Metal Casing against the drilled rock. We have GRANITE Rock here and 400' drilled 6" hole through it.
After the "Bladder is placed they put several thousand lbs of pressure in it to hold in place. Then the well is filled with water at 150 gpm and when filled they pressurize the 340' of drilled rock below the "Bladder" up to,4,500 psi. This extreme pressure forces opens all the Fissures in the Granite and hopefully opens up where the water veins are. Hoping to get 10gpm extra. But might not get any or a 1 gpm. It all depends on where the cracks in granite are and the water vein.
Have neighbors down & up the road same time drilled 15 years ago. One has 100' and 10GPM, (only 100 yds away from our well), another 200' and 12GPM, (250 yds away) and another one 250' and 8GPM (300 yds away).
It all depends if you hit the right spot! I hope to get a good supply of water and should have done this years ago. Just hope that I don't hit the water veins where all my neighbors are getting their water and dry their wells out.