Fields of application, drilling techniques, drilling equipment
dhms gas-borehole, long-hole and prospecting hydraulic drilling machines are mainly used for the drilling of boreholes for gas drainage and prospecting purposes. They are also suitable for flash drilling, water drainage work, drilling of injection boreholes, core drilling or other drilling tasks. dhms equipment is employed in all kinds of applications which require drilling machines with very compact dimensions for extension drilling operations.
Boreholes can be drilled in all types of rock strata, in coal seams as well as in fractured and unconsolidated ground. The drilled holes can also be cased, if necessary. Depending from the drill rod and boring head (diameter and type) different borehole lengths an diameters can be drilled.
For the various drilling requirements two basic types of machine are produced, using either heavy or lightweight technology. A range of models for both versions are available which can be operated either with rotary or percussive technology.
dhms can also supply the drilling tools to match the drilling task and type of machine being used. Experienced technicians are on hand to help customers select the most suitable tools and drilling method.
Every dhms drilling machine is equipped with a compact hydraulic drive unit mounted in its own carrier frame and comes complete with all necessary drive elements, supply lines and monitoring instruments. A range of electric motors is available for every conceivable operating voltage and frequency. The hydraulic unit consists of several pressure-regulated axial piston servopumps. A choice of mineral oils, bio-oils or fire-resistant HFC fluids is available as pressure medium. The hydraulic unit also contains a cooling and filtration system and operating temperature and filler level are monitored automatically.
Drilling control panel
The drilling machine is controlled via a convenient and easy-to-operate control panel. For application of the percussive drilling method the control includes a tapping stage, an automatic connection / disconnection of the hammer and an automatic anti-jamming mode. For application of the rotary drilling mode the control includes an automatic drilling mode for automatic regulation of the drilling advance depending from drilling resistance (rotation pressure).