SIZE : AX, BX, NX, NXD3, AS, BS, NS, NS3, HS, HS3, T76, T56
USAGE
It is a device to take the cores drilled by the core bit, and made of pipe.Core barrels are mostly used to take the core, but sometimes they are used to increase the drilling efficiency even in case core is not needed. There are several kinds of Core Barrels in accordance with the usage;
Single Tube Core Barrels : AX, BX, NX - These are generally used to increase the collection rate of cores at an even ground. They cannot be used at the ground that can be easily collapsed or eroded by the circulation water.
Double Tube...