Horizontal directional drilling
The technology of the horizontal directional drilling (HDD) allows VIS-MOS to build oil/gas pipelines, water lines and telecommunication systems through the natural and artificial obstacles such as rivers, lakes, roads, railway lines and dams – simply crossing under them.
There are three stages in the process of pipeline construction:
- 1 - Pilot hole drilling;
- 2 - a consecutive widening of borehole;
- 3 - pulling through of a pipeline.
The horizontal directional drilling (HDD) method is an alternative to the traditional trench method and it represents the technology in which serious resource-saving reserve is included. Its application is economically beneficial and these benefits are short-term and long-term that can be obviously proven by the comparative analysis of two methods of pipeline construction.
Comparison table:
Trench method | Horizontal directional drilling method |
Work content Finance Terms | |
Large volume of excavation
Involving heavy machines and special water transport Great number of labor force | A single drilling complex
A single team of workers |
Considerable financial expenses | Financial expenses reduction up to 30% |
Long construction period | Reduction of construction period from 2 to 20 times |
Additional expenses | |
Costs for accidents elimination and their consequences | The risk of accident emergence is brought to naught |
Operating costs for control and repairs | The guarantee of long-term preservation of pipelines
Lack of operating costs |
Construction of a reserve run of pipeline | A chance to reject a reserve run of pipeline |
Environment and Man | |
The Nature suffers from non-recoverable damage | Ecology and landscape remain virginal |
- Navigation dependence
Traffic conditions interruption | Navigation, road and railway traffic is not interrupted |
Paving is damaged
Tempo of life is disturbed | Paving is not damaged
People are not disturbed |
Long-term preparation and confirmation of conciliatory documents with the environmental organizations | Minimum coordination with environmental organizations |