Thin Wall BTW NTW HTW wireline double tube core barrel assembly head assembly Conventional Drilling

Wire-line drill tools can lift drill core from dril rods without picking up bits .All the tools include principal parts of the drill tools . overshot assembly ,drill rods , holding dog, circle wrench and etc. Their advantage are higher penetration , higher core recovery ratio ,longer bit life and lower lab intensity ,and the advantages get more clear with the increasing of hole depth .