Wire-line core drilling tools can lift core from drill rods without picking up coring system. A complete set of wire-line drill tools include: Core barrel assembly, overshot assembly, drill rods, holding dog, hoisting plug, circle wrench etc. It has some advantages such as high penetration rate, high penetration rate, high core recovery ratio, long bit life and lower labour intensity. The advantages can get more clear with the increasing of drill hole depth.

Brief Introductions of Diamond Circle Wrench
We provide different sizes of diamond circle wrenches and TC wrenches for inner tubes, outer tubes and rods. The diamond distribution is well-proportioned on diamond circle wrench. This product is widely used in geological exploration and mining industry.
Features of Diamond Circle Wrench
The diamond is wearable and hard to fall off.
Slip resistance: this can reduce the damage of tubes and ensure a long using life.
Available Size of Diamond Circle Wrench
Inner tube wrench: BWL, NWL, HWL, PWL, LTK48, LTK60
Outer tube wrench: BWL, NWL, HWL, PWL, LTK48, LTK60
41mm, 42mm, 43mm, 44mm, 45mm, 53mm, 54mm, 55mm, 56mm, 71mm, 73mm, 74mm, 89mm, 92mm, 95mm, 117mm