Drilling with the Comacchio GEO305 High Powered Rotary/Percussive Drilling Rig..

Medium in size, large in power and performance, the Comacchio GEO305 is as capable conducting SPT's as it is drilling 100m water wells..

The Comacchio GEO305 rig, weighing in at 4.50t is transported to site by adp's own 26t DAF beavertail truck and supported by a van containing all the drilling equipment and site specific materials.

With the capability of hollow stem auguring and dynamic sampling to 25m, rotary coring and open hole drilling to depths of up to 120m and numerous geotechnical and environmental tests available, the Comacchio GEO305 is the answer to all your problems.

The Comacchio's "slide-o-matic" head allows the transition between the high torque, high speed rotary head and the high power hydraulic impact hammer in a matter of seconds - meaning borehole progression, sampling and tests in any geology!

In compliance with all HSE and client requirements all of our rotary drilling rigs are fully guarded, giving ultimate protection to all drillers and public.

GEO305 Rig Dimensions (when working)

Width: 1.50m Length: 4.00m Height: 5.00m (reduced height 3.60m) Weight: 4.50 tonne

Rig Feed: 3.5 tonne Rig Pull Back: 6.5 tonne Engine Power: 75hp

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 Augering (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 8", 10" & 12" diameters to depths of 25m, 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 location.

Open Hole Drilling - Drag Bits / Rock Rollers /Claw Bits / PCD Bits / DTH Hammers (Fully guarded)

Down the hole hammer (DTHH), tri-cone rock roller, PDC 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 120m making the GEO305 the ideal rig for GSHP and water boreholes where access is a problem.

Rotary Coring (Fully guarded)

Thin wall double tube core barrels incorporating a plastic liner are used to retrieve cores up to 116mm 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.

Common Applications for the GEO305 Rig

Monitoring well installations

Recovery well installations

Piezometer installations

Water well installations

GSHP/Geothermal loop installations

 *Apologies for the continued use of Keywords such as Utility Surveying, Utility Mapping, Diamond Coring, Vacuum Excavation, Hydrovac, Environmental Drilling, Water Well Drilling and Geothermal Drilling; such word repetition is the requirement of search engines.