
H.D.D.
Horizontal Directional Drilling
Horizontal Directional Drilling or H.D.D is one of the threnchless technology to build underground utility pipeline, such as fiber cable, power cable, gas, oil and water.

Inner Duct Installation
Increase the service life of the main pipe and drcrease surface excavation opportunity.

Cable landing
Pull in the cable from offshore to onshore, which is pulled to substation or cable station later.

Pipe mapping
Run the gyroscope in the pipeline to position the underground pipeline.

Core Drilling
Sample and analize underground layer.


Bentonite
Bentonite is an aluminum silicate clay absorbent, mainly constitute of montmorillonite. After mixing with water it becomes drilling fluid and will be pumped out through drill pipes by high pressure mud pump, provides lubrication to drill string, hydraulic power to drill bit to increase cutting and cooling drill bit, bring the drill cuttings out of bore hole and stabilize the bore hole.

HDPE pipe
HDPE is the abbreviation of High density Polyethylene. It has high impact strength, high stiffness and hardness, good chemical resistance, high environmental stress cracking resistance, good electrical properties, good surface gloss and excellent processing characteristics etc., therefore, it’s often used in underground pipeline such as electricity, water and telecom.
