There are different methods of hydro-fracturing but since the "Zone Isolation" method is the most successful, it is the only one Drews Well Drilling uses.
Hydro-Fracturing is a process by which water is injected into a low yield water well at a high pressure and volume opening up and cleaning out the existing fractures found in the rock. This process is designed for hard rock wells. The success rate for this process has a national average of 95% success, making the Hydro-Frac process the most effective well development tool available.
Using the "Zone Isolation" method two packers are lowered to the bottom of the well and inflated. This creates a "zone" between the packers. Water is then injected at high volume and high pressure into the zone until it is freed of obstructions. After a zone has been fracked, the packers are raised at regular intervals and the process is repeated until the entire well has been fracked. By concentrating the injection to where it is most needed, zone-fracturing insures optimum yield. Below are illustrations of the process.