Horizontal Directional Drilling
Oxford
Plastics manufactures HDPE plastic pipe for trenchless technologies
like horizontal directional drilling. HDD is a trenchless
construction method used to install pipelines of various sizes and
materials below the ground surface. Imagine being able to replace
the entire water supply and drainage system of a city without causing
a major traffic jam and incurring the enormous cost of restoring
your streets and roads. That is the promise of trenchless technologies
like horizontal directional drilling.
When
it comes to trenchless installations using directional drilling,
polyethylene pipe is the pipe of choice. It's flexibility, strength
and fused joints that
are as strong as the pipe itself, make it ideal for HDD applications.
Horizontal
directional drilling is often used where open cut installations
are not feasible such as road and river crossings. Using directional
drilling techniques to guide a drill string along a borepath under
obstacles such as rivers, lakes, railway crossings or highways,
you can quickly replace existing water lines or install new ones
at an amazing rate.
As
the hole is bored, a steel drill string is extended behind a cutting
head. Drilling mud is used to cool the cutter, to flush excavated
soil from the borehole and to lubricate the borehole. The cutting
head is removed and a backreamer attached. The pipe string is attached
to the backreamer through a weak-link device. As the drill string
is withdrawn to the drilling rig, the backreamer enlarges the borehole
and the pipe string is drawn in. As with any pipe pulling technique,
the movement of the drill string and the pipe string must be monitored.
The pulling load on the polyethylene pipe must not exceed the allowable
tensile load, or safe pull strength of the pipe.
With all the recent developments in drilling
equipment and operator expertise, there has already been and will
continue to be a dramatic increase in the installation of water
and sewer systems using directional drilling.
Contact
us today by email or our toll free number:
sales@oxfordplasticsinc.com
1.800.263.0502
For
more information about trenchless technologies:
Centre
For Advancement of Trenchless Technlogies (University of
Waterloo)
North American
Society for Trenchless Technology
Trenchless Information
Center
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