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Radial Jet Drilling (RJD)

Radial Jet Drilling (RJD) is a reliable stimulation method applicable in new or old well enhancement. The procedure is simple, a drill bit (Milling bit) is used to open a 20-24 mm hole on the casing, and then using a jetting hose (pressurized fluid) connected with coiled tubing to drill several horizontal holes at different depths and directions of the formation. The diameter of jetted horizontal hole is around 40-50mm and length is up to 100m.

Benefits of RJD

Increases production rate and recoverable reserves (especially from marginal wells).
Extend the life of a well.
Allows directional treatment of wells e.g. acid, steam, CO2, etc.
Improves injection rates in water disposal/injection wells for water flooding recovery techniques.
Allows multi-layer application in thicker reservoir zones.
No need for large, expensive rotary rigs.
No mud pits that can damage the environment.
No casing milling equipment necessary.
Average operation duration is a few days per well.

No need to change well-bore configuration.
Short Operation Cycle and Low Cost
No slurry is needed and no great damage to the layer.
Little fluid consumption (10～20 m³ per layer).
Holes on the casing have less damage than perforation on casing and less impact on casing strength.
Cost effective and environment-friendly
It can be applied in both new and old wells

Technical Advantages

Establishing and increasing seepage channel for the reservoir
Intersecting natural fractures thereby allowing faster zonal drainage
Forming micro to macro fractures around the created hole
Deep acidizing and directional fracturing can be achieved
Removing block around area near wellbore and far away from wellbore
Reaching past conventional perforation distances into virgin parts
Reforming the formation with acidizing and fracturing operation
Expanding drainage area for a single well
Reduces flow resistance by increasing drainage radius

Delivery of adjunct treatments (e.g. acid, CO2, nitrogen, heat) far into the zone
Adjusting stereoscopic well pattern
Capability of multi-directional jetting across various levels
Improves penetrability beyond wellbore formation damage
Improves the efficiency of geomechanics-based and direction-sensitive operations
Has the capability to apply different fluids and chemicals as a jetting fluid
It is also used as an alternative to frac work as well as a method to directionally control frac and other chemical or steam injection applications.
RJD between the intervals of perforations can be done with no problem.

Radial Jet drilling