We have established ourselves as the leader in HDD industry. HDD constitutes an important component of many pipeline construction projects. For more than twenty years we have employed this drilling technique as an environmentally friendly, safe, realiable and efficient alternative to conventional construction methods. Horizontal directional drilling is more efficient, often more economical, faster and, above all, has much less impact on the environment. It is also widely used in the oil and gas, power and telecommunications industries for bringing pipelines and cables ashore or taking them offshore.
The characteristics of HDD make it the best solution for many customer needs; in some cases it provides the only practical solution. Nacap uses horizontal directional drilling for, among others:
- Waterways
- Nature reserves
- Major roads and traffic junctions
- Railways
- Industrial sites
- Densely populated regions and urban areas
- Landfalls and outfalls
- Flood plains and bogs
- Unstable soil conditions
- For getting below contaminated ground.
- Environmentally friendly with minimal disturbance
The traditional method of constructing a pipeline, in which a trench is excavated, can lead to major obstructions and objections amongst various authorities and in different areas. Horizontal directional drilling avoids breaking open or causing damage to these areas and it minimises the impact to the surroundings of the works.
HDD in steps
• a pilot hole is drilled according to the profile design. Directional control is achieved by using the survey steering tool system. The survey probe installed in the drilling assembly measures the survey data required for steering the drilling tool along the design profile• The hole is then enlarged and conditioned in stages using a sequence of reamers/flycutters/hole openers to the required diameter for receiving the product pipe• The product pipe is then pulled into the hole by the rig
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