The AGE One-Shot Casing Grout Packer has been specifically designed to abolish the need for drill-out inside fibreglass casing, as this will often lead to rotational damage on the walls from the drill string.
We have encountered many newly installed bores that have required repair to the fibreglass casing before commissioning as a result of this scenario taking place. This system also has the advantage of lower drilling costs due to the reduced hole size needed to install the same size screens using conventional bore construction methods. It also means less tripping of rods in and out of the hole as there is a single hole size for both casing and screens.
The system is installed by running the packer in-line between the screens and the casing as a single string. When at depth, a grout stinger is run in on the end of the drill string, lands on a slight diameter reduction in the packer and creates a sealed path from the string into the packer. Inflation water is pumped via the drill string into the packer to seal into the open hole. All inflation water is held in place by a tam check valve.
The inflation pressure is then raised to a pre-nominated pressure and the ports in the grout stinger will divert from packer inflation to grout ports. Grout is then pumped through the rod string until returns are observed at the surface. Again, all pumped fluid is retained by a tam check valve once it has passed through the ports. Upon grouting completion, the grout stinger can be removed from the casing. There is no need for drill out – once the stinger is removed, the bore is complete.
Bore installation using our One-Shot packers has become increasingly popular due to the simplification of the drilling program, and the greater flexibility in casing size and materials to achieve the required production from your bore.
To find out more or to discuss any specific needs you have – be it for off the shelf equipment or custom designed equipment, contact AGE Developments.