| • | A single location area can be used to install different pipes. |
| • | Less invasive, protects the ecosystem and adjacent areas. |
| • | More secure than traditional open cut. |
| • | Weather will not impact directly on the process. |
| • | Limited disruption, ideal for sites such as roadways, railways, recreational facilities, waterways and areas of high population density. |
| • | Ability to drill beneath surface obstructions or ongoing site operations. |
For most HDD applications, the drilling tools and rig equipment are individually designed for each job. Pipe selection is a critical part of this process. TSC Superior HDD manufactures a wide range of pipe suitable for most HDD projects. By offering 3 1/2" OD to 7 5/8" OD with connection configurations matching the design requirements, TSC Superior HDD is one of the largest suppliers to this specialized industry. Tungsten carbide hard-banding and non-standard lengths are available on request.
Process
• SITE INVESTIGATION AND DESIGN – Includes the site survey, locations of existing pipelines and services, and a geological investigation. Placement and equipment are then determined.
• PILOT HOLE DRILLING – A Pilot hole is drilled from the entry point to the exit point along the pre-determined profile and direction.
• HOLE ENLARGEMENT – In most cases pilot hole enlarging, also known as "pre-reaming," will be necessary. This is required to provide a bore diameter large enough for the pipeline to be installed in the drilled crossing.
• PULLBACK – The pipeline is pre-assembled and placed on rollers. A reamer is then connected to the drill pipe to enlarge the bore. The drill pipe is pulled back to the entry point until the pipeline is completely installed.
