A coiled tubing workstring is used to position a specially designed ABRASIJET gun, through which a slurry containing abrasive solids is pumped at high differential pressure. The abrasive material is typically 20/40 or 100 mesh fracturing sand. The resulting high-velocity fluid stream perforates tubulars and any surrounding cement sheath.
Once the perforations are cut, the fracture stimulation is pumped down the casing through the CT annulus. The stimulation treatment is tailed in with a sand plug that settles out to isolate the recently stimulated zone. If the sand plug is off depth (e.g., too high), the sand plug top can quickly be adjusted as CT is already in the well to facilitate reverse circulation. With the sand plug in place, abrasive jetting begins on the next zone with perforations again being cut through the casing. The process is repeated for as many zones as required, all in one continuous CT stimulation operation.