a) Maxa has been pioneering the “HD” type of application (straight drilling, without Directionality function), which is consisting of DIRECT PLACING OF STEEL PIPES, up to 1.200mm dia., Horizontally or inclined, through ANY KIND OF GROUND FORMATIONS, including hardest Rock, to a max. length of approx. 120m.
This is achieved by special DTH Hammers, as standard DTH Hammers would be unable to restart operation whenever stopped (the hammer’s piston is not re-positioned by gravity as during vertical drilling) and reinforced Bit sets.
This application is normally mounted on “pipe jacking” types of HD Drilling rigs.
Productivity is extremely high, compared to any other HD method in difficult ground conditions.
b) Usually when Horizontal HDD (Horizontal Directional Drilling) rigs and tools are utilized for Large Diameters, it is necessary to start the hole with a smaller diameter and then to carry out (often Multiple steps of) REAMING by suitable tools in order to achieve the final diameter.
Recently some technologically advanced solution has been developed by a German rigs manufacturer IN ORDER TO MAKE POSSIBLE DIRECT STEERING OF LARGE DIAMETER HORIZONTAL HOLES, without needing further Reaming operations.
HOWEVER SPECIALLY ADAPTED DTH HAMMERS AND BIT SETS HAD TO BE DESIGNED IN ORDER TO MATCH WITH THE RIGS’ FEATURES.
Maxa has provided the German Company with the optimal type of Hammers and Bits for this kind of application.
The result of this combination of technologies, using the German Chief Technical Manager’s own words, was “Very successful, and the steering of our (combined) System was perfect”.
Therefore we can now offer, in cooperation with the German rigs’ Manufacturer, the optimal solution for FULL DIRECTIONAL DRILLING up to 1.200mm dia. and over 100m length.
Applications include placing of Facilities across roads, rivers, etc. and “Roof Top” fore-poling treatment to protect excavation of tunnels.
The lattest was commonly used for shorter lengths (10-15m) and small diameters (3″-6″), but now it is applied to much larger parameters! If you want a durable and dependable drilling equipment with powerful drilling penetration rate in competitive price, MAXA mark series is definitely your choice.
