Casing Grouting Systems

In order to construct a robust water bore that will deliver a long, high-performance service life, the bore casing must be properly cemented in place during installation. This is important as it avoids potential ingress of surface waters, protects the casing from corrosive soils, seals off aquifers with poor water quality, prevents intermixing of different aquifers, and is required in order to comply with statutory requirements. There are many methods available to cement in casing, though it is important to make a selection that best suits the specific attributes, drilling methods and materials for each bore.

We have witnessed many examples of bores failing through service or being damaged during installation as a result of poor selection in grouting methods. As a result, AGE has designed several products to ensure a high quality casing grout is achieved.

One-Shot Casing Grout Packers

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.

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Casing Grout Valves

Casing Grout Valves provide a simple means of effectively and safely grouting the casing. Similar to the One-Shot Casing Grout Packers, the Grout Valve is run in-line with the casing upon installation.

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Float Shoes & Float Collars

The most common method used to pressure cement casing for water bore installation is through float shoes or float collars. They comprise a length of pipe connected to the casing string, with a non-return valve encased by a drillable solid. This encasing material is a rubber-filled cement composite that we have developed in-house to allow for a fast, efficient drill out. For classical bore construction design, they provide an effective method of casing installation.

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