20 ... you are kidding, right? Types of Fracking have been going on for more than 50 years. This is not a new process. It wasn't a new process back in 1985 when I was working the oil-fields outside of Wichita Falls, TX - and it was being done all over PLUS most of the old fields out there were also using injection - flooding of chemicals and/or salt water to push out the remaining oil.