It is a large diameter clamps to mount on the reverse circulation pile top drilling rig and clamps on the bored pile casing to drill the hole

It is a flanged drill pipe for reverse circulation air lift drilling. It is a part of drill string to transmit the torque from the rotator of the pile-top drilling rig to the drill bit body.

HD manufactures a wide range of drill pipe stabilizer and drum stabilizers for large diameter bore piling. The stabilizers complete with arms, pad and stabilization drum to stabilize the drill string during drilling.

HD manufactures a wide range of bit bodies for bored ranging from diameters of 750mm (29.5") to 3200mm (126"). Web type and Drum type are available upon the customer requested.

The Belling Tools are used to increase diameter and subsequent area at the foot of bored piles so as to decrease the specific bearing pressure. A wide range of diameter can be custom built to suit the applications.

It is a hydraulic operated underreaming bit that allows the drilling of bored pile at a large diameter than the casing. This makes it ideal for casings to overcome boulders and also to enable drilling of rock sockets smaller or greater than the outer diameter of the casing.

Casing Retaining Device for Diameter up to 3000mm
This casing retaining device is designed for replacing casing oscillator to retain the casing when oscillating of casing is no larger needed. Thus, the casing oscillator can be free to perform the next tasks.

Casing Cutting Ring with thick steel ring with either weld-on or exchangeable type tungsten carbide cutting block from upto 3500mm dia.

Spherical Grab for large volume of soil and soft rock excavation for bore piling application with single wire or double wire operation mechanism.