The Comacchio Geo 205 is one of the best compact geo-environmental drilling rigs available today, with a tried and trusted pedigree it is ideally suited to almost any general site investigation contract to 30m or deeper in solid geology
As with all of Tor Drillings rigs the unit has a full interlocking safety guard system including kill switches and comes site ready for any site with a Chalwyn valve and spark arrestor fitted as standard.
Drilling depth’s for this machine vary depending on Geology, Bore diameter and the Method in use, but generally the unit is used for boreholes up to 30m in most ground conditions but can be used to core or open hole rock to greater depth’s.
The rig stats for access:
Weight = 2.75 tons / Access Width = 1.2m / Access Height Mast Down = 2.0m
Operational Height is adjustable: Full Height = 4.350m / Intermediate = 3.350m / Low 2.900m (no winch available)
Drilling Methods Available with a Geo 205
Surface Concrete Removal
A simple compression sprung coring attachment can be used on the rig to cut a 200mm Ø hole through surface concrete, these units were designed and built by Tor we can also attach power breakers which run off of an auxiliary supply available on the machine.
Percussive / Window sampling:
Percussive sampling can be achieved with the use of the Krupp hammer which allows the rig to drive in linered window sample barrels to recover undisturbed environmental or geotechnical samples; it can also be used to recover U100 samples
Solid stem and Hollow stem augers (sometimes called cased auger) can be used on this machine up to 200mm OD
Rotary coring of hard rock formations can be achieved with this rig with a selection of barrels with varying core sizes
Wire Line Coring
Some of our rigs are set up with fast winch systems to enable wire line drilling in Geo Bore S
Drilling & Casing
Various size odex or symetrix duel drill & case systems can be used on this rig up to a maximum 200mm diameter, these systems are used widely to case of all types of unstable overburden to enable access to lower more competent strata formations whether for environmental or geotechnical site work
In situ Testing
The unit can achieve in-situ SPT’s / CPT’s and undisturbed samples making use of it onboard winch to operate hammers and sampling equipment
Once drilling is complete in a size and method agreed the created bore can simply be backfilled or installed with a vast array of ground monitoring instruments as required.
Air, Air mist or Water but Mud’s and Polymer flushes can also be used to suit your requirements