TEMPORARY (drilling) CASING

Temporay or drilling casing is available in various sizes and is flush butt jointed with a square thread entirely within the wall thickness giving a smooth flush line both inside and out. We supply casing to British Standard BS879 - Water Well Casing, but other standards can also be supplied to order.

The Forager-55/1250 will handle casing lengths of 3 metres, but for ease of handling the weights we normally supply 1.5 metre lengths. Special lengths can also be supplied on request.

The size pictured is 6-inches nominal bore with an outside diameter of 6-5/8" (168.3mm) weighing 40 Kg per metre. Other sizes suggest use are 8-inch and 4-inch but inch sizes from 3-inch upwards are available. Each size of casing reqires a casing shoe, casing drive cap, lifting bail and pin, and casing clamps. We suggest that casing thread protectors be used at least on the pin threads to protect against damage during handling.

Temporary casing is normally intended to be withdrawn after use, and in most circumstances the rig, with snatch blocks, will pull the casing out. In some materials, or after heavy driving, this is more difficult, and we can supply a hand operated hydraulic jacking system for casing removal. 20-ton and 40-ton systems are available. These systems can be power operated using an external hydraulic power source.