HDD drilling system on solid control

1.a complete equipments 2.high quality 3.good service

Horizontal directional drilling (HDD) techniques are used for steerable installation of new pipelines, ducts and cables. Using the correct type of drilling rig, bores can be carried out between pre-excavated launch and reception pits or from the surface by setting the machine to drill into the ground at a shallow angle.Installation of the product pipe or duct is usually a two-stage operation. A pilot hole is drilled along the required path to provide steering information, and the bore is then back-reamed in a single or multi-stage operation, depending on the ground conditions and project requirements, to a larger diameter to accommodate the product pipe. During the final ‘pullback’ stage, the product pipe is attached to the reamer by means of a swivel connector, and is pulled into the enlarged bore as the drill string is withdrawn. A load monitoring device may be used to prevent overstress of the product pipe.Both surface-launched and pit-launched drilling machines are available, the choice depending on the nature of the project. Machines range from compact rigs suitable for small bores and operation in restricted spaces, to extremely large units designed for large diameter, long distance crossings. Most guided boring machines use a drilling fluid, which lubricates and stabilises the bore, and also conveys the excavated material in suspension. In recent times the relative cost of HDD has fallen to below that of trenching for many applications, meaning the popularity of this technology will continue to rise.As a manufacturer ,TR provides a complete line of drilling fluids, solids-control and drilling waste management equipment and services for HDD Mining &Waterwell.

HDD drilling system on solid control