Drilling with the Comacchio GEO205 Rotary/Percussive Drilling
The ultimate Geotechnical and Environmental Site Investigation rig..
The Comacchio GEO205 rotary drilling rigs are capable of carrying out numerous drilling techniques, whilst still
being light weight and compact, thus making them very versatile cost effective rigs. The Comacchio rigs are powered
by a silenced diesel engine fitted with a spark arrestor and chalwyn valve.
The GEO205 is transported to site via a Land Rover and specialist plant trailer and backed up by a support
vehicle carrying all consumables and ancillary drilling equipment. The GEO205 rigs are also capable of drilling
under forecourt canopies, standing lower than the canopy standard of 4m. The rigs have a powerful impact hammer
mounted to the side of the main drill head, which is used to advance windowless sample barrels through soft
substrata to retrieve high quality samples. Upon encountering harder geology the rigs have several solutions to
offer including, hollow or solid stem augering, open hole or rotary coring. In compliance with all HSE and client
requirements all of our rotary drilling rigs are fully guarded, giving ultimate protection to all drillers and
GEO205 Rig Dimensions (when working)
Width: 1.15m Length: 3.80m Height: 4.40m (full
Height) / 3.85m (reduced height) Weight: 2.70 tonne
Rig Feed: 2.5 tonne Rig Pull Back: 2.5 tonne Engine
Dynamic Windowless Sampling
Windowless sampling barrels between 86mm and 146mm diameter contain
plastic liners to retain soil samples. Liners are removed from sample barrels after drilling. The use of a
plastic liner allows for excellent presentation of high quality samples.
SPT/DPT/Undisturbed Sampling (All SPT hammers
calibrated to give N60 values)
SPT, DPT and undisturbed sampling (100mm diameter U100 & 70mm
diameter U70) can be carried out during the drilling of boreholes.
Hollow/Solid Stem Auguring (Fully guarded)
The rotary drive heads on our rigs can be set to a low speed high torque setting to allow for both hollow and
solid stem auguring in 6" and 8" diameters to depths of 15m, in the case of hollow stem auguring we can also
advance windowless sampling barrels through them to allow for soil samples to be taken at any stage of the
Open Hole Drilling - Drag Bits / Rock Rollers /Claw Bits / PCD Bits / DTH Hammers (Fully
Down the hole hammer (DTHH), tri-cone rock roller, PCD and drag bits can be used for rotary open hole drilling.
DTHH is used with air flush for open hole drilling in rock and hard strata. Tri-cone, PCD and drag bits can be
operated with air or water flush. Open boreholes can be formed to depths of 60m.
Rotary Coring (Fully guarded)
Thin wall double tube core barrels incorporating a plastic liner are used to retrieve cores up to 93mm diameter.
The rigs can use water or air flush as required. The ability of our rigs to soil sample and rotary core allows for
borehole progression in most ground conditions.
Symmetrix Over Burden Casing System (Fully guarded)
Symmetrix casing systems can be utilised where overburden or unconsolidated sands/gravels can become a problem,
the Symmetrix casing system is available in an OD of 168mm, providing an ID of 132mm through the ring bit.
Low Headroom and Narrow Access
With rigs differing in size and appearance we can drill in most places, anywhere from slopes to narrow access,
forecourt canopies to substations.
Common Applications for the GEO205 Rig
Monitoring well installations
Recovery well installations
Water well installations
GSHP/Geothermal loop installations
For more information on any of the above services provided by adp, for quotes or to just discuss your
project please contact:
Tom Page - T: 01454 227 115 - M: 07817 419 954 - E: email@example.com
*Apologies for the continued use of
Keywords such as Utility
Surveying, Utility Mapping, Diamond Coring, Vacuum Excavation,
Environmental Drilling, Geotechnical Drilling,
Water Well Drilling and Geothermal Drilling; such word repetition is
the requirement of search engines.