Core Barrel

AUPIROC offers a complete products range of single, double and triple tube core barrel assemblies and their parts, which going with superior performance and obtain the full recovery of the sample in any application of diamond core drilling.

Wireline system ensures core sample is recovered quickly by retrieving the inner tube directly through the drill string. The rods remain in the hole until the bit needs to be replaced, this has big cost advantages when drilling deep holes for mineral exploration.

Standard wireline double tube core barrel assemblies are ideal for using in most of the drilling conditions and are available for application in standard hole sizes (BQ, NQ, HQ and PQ).

Wireline triple tube core barrel assemblies enable integral core recovery when drilling in coal, clay bearing or highly fractured formations. The split tube retains the core sample in its received state for easier loading into sample trays or for storage and subsequent presentation to the geologist. The triple tube core barrels is available in N, H and P sizes.

When the inner-tube is full, a device called an overshot is lowered down the hole via a wireline cable and brought to the surface by use of a winch.

Once the inner-tube assembly is at the surface, an empty inner tube is lowered into the hole so drilling can resume

An overshot is available for each size of core barrel. This is the retrieval device lowered by wireline cable to recover the inner tube assembly containing core sample.

And there we need to use water swivel to pump water and mud into the hole to lubricate, wash out the debris and cool the bits.