Directional drilling is the drilling of non vertical wells. Horizontal drilling, one type of directional drilling, is a method that is used to install pipes, conduits and cables underground in a long shallow arc. This arc follows a preset bore path using a surface drilling rig.
Horizontal drilling, also known as H.D.D. or Utility Installation Directional Drilling, minimizes environmental impact and is often used when trenching or excavating is not a practical or viable option.
H.D.D can be used in a variety of soil conditions and is ideal for projects which necessitate crossing roads, landscapes, congested areas, environmentally sensitive areas or waterways. Directional drilling is frequently used in order to decrease boring costs and completion times, to limit traffic disruptions and to increase environmental safety.
Horizontal drilling can be used to install pipelines to carry natural gas, oil, water, sewage and petrochemicals, as well as to run conduits for power and telecommunication lines.
Pipes used in horizontal drilling
Often used in trenchless applications where digging is difficult or impossible, high density polyethylene (HDPE) pipes have many characteristics that make them the choice product. HDPE water pressure pipes can be connected by a process called butt fusion, where the ends of the pipes are heated and joined together. Black HDPE gas pipes are used for natural gas transmission, where a zero leak rate is crucial.
What makes HDPE a popular choice?
Flexibility
HDPE pipes are flexible, an important characteristic which allows the pipe to absorb and withstand surge pressures, stresses and vibrations which are caused by soil movement.
Chemical resistance
Polyethylene’s ability to resist to a large number of chemical reagents allows this product to be used in a variety of industries.
Impact resistant
Compared to other plastic materials used in pipes, HDPE pipes have a very high impact strength which is necessary to withstand the harshness of pipe laying conditions.
High flow capacity
Thanks to HDPE’s low friction feature and its surface energy characteristics making it next to impossible for substance deposits to form, the smoothness of the pipe is maintained throughout the life of the pipe.
Resistance to weather conditions
Including carbon into the raw material which is used to manufacture black HDPE pipes protects the pipes against UV light degradation. The black HDPE piping is ideal for projects where piping is exposed to direct sunlight.
Abrasion resistance
HDPE’s high resistance to abrasion allows the piping to outlast many other materials when exposed to the same conditions.
Simplicity of installation
As a result of its lightweight and long lengths, HDPE piping, particularly the coiled type, is widely used as it is quick and easy to install and requires less jointing.
PVC PLUS DRILLING PRODUCTS INC. offers PE pipes ranging from ½" to 63" in diameter. Because of their unique physical characteristics, PE pipe products are frequently used in infrastructures where other materials would not suffice. A leading supplier of PVC pipe and pvc pipe fittings, PVC Plus Drilling products manufacturers slotted PVC pipe screen in horizontal and custom patterns and distributes Teflon, CPVC, Stainless Steel and HDPE slotted pipes and pipe fittings. For drilling products and any related questions, contact PVC Plus Drilling Products Inc.
http://www.polymoldproducts.com/PE_PIPES.htm
http://www.rare.co.za/Rare_Water/siteimgs/WHY%20HDPE%20Pipe.pdf