Injection is a method of drilling waste disposal which is aim at “ZERO” discharge nominally. Slurry injection is one of the methods, it is grinding or processing solids into small particles, mixing them with water or some other liquid to make a slurry, and injecting the slurry into an underground formation at pressures high enough to fracture the rock. Including slurry fracture injection, fracture slurry injection, drilled cuttings injection, cuttings reinjection, andgrind and inject.