Drilling a borehole is often combined with sampling and describing a profile. If both these activities are not necessary during the drilling procedure then drilling can be executed fast and efficient applying the so-called lost cone drilling method. Eijkelkamp Soil & Water developed a manually controlled set using an electrical percussion hammer to hammer the lost cone and the accompanying casing into the soil.
Lost-cone drilling set, the standard set for drilling according to the lost-cone method
The specially designed lost cone is hammered into the soil using an electrical percussion hammer, which is placed on the casing. The lost cone produces a very straight borehole that is slightly wider in diameter than the casing in order to reduce the friction. This procedure makes it easier to reach greater depth and the friction on extracting the casing is limited.
On reaching the desired depth a filter tube can be lowered through the casing or sensors can be left in the borehole. Subsequently, the casing can be extracted using the 2-person operated rod puller in combination with the universal casing and rod pulling clamp.
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Standard set for drilling according to the lost-cone method.
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Eijkelkamp 10.100 Lost Cone Drilling Set can be hammered into the soil using an electrical percussion hammer, which is placed on the casing. -
Produce a very straight borehole that is slightly wider in diameter than the casing in order to reduce the friction.
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On reaching the desired depth a filter tube can be lowered through the casing or sensors can be left in the borehole. -
Subsequently, the casing can be extracted using the 2-person operated rod puller in combination with the universal casing and rod pulling clamp.
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Applied when placing monitoring well pipes with a small diameter, for environmental research. -
The complete set contains an electrical percussion hammer, an aggregate with insulation guard, striking pens, drive-cone holder for percussion casing, steel casing, pulling equipment, lost cones and various accessories. The standard set is equipped for drilling to a depth of up to 10 m.
Benefits Lost cone drilling set
- Solves problems installing wells in stony soils
- Also, the safest way to lower explosives
- Bentonite plugs will repair layers perfectly
- Ideal in combination with Direct Well
- Tested for ten-thousands of drilling meters
- Non-toxic iron lost point copes with analysis
Remarks
- Limited to soils with some porosity
- Shear stress value of soil cannot be too high
- Contact SonicSampDrill for higher speeds and larger depths
Applications
The lost cone drilling method is successfully applied when placing monitoring well pipes with a small diameter, for environmental research. After drilling the lost-cone is left in the soil. This does not cause any environmental problems as the material used is present in the soil by nature.
Accessories
This very complete set contains an electrical percussion hammer, an aggregate with insulation guard, striking pens, drive-cone holder for percussion casing, steel casing, pulling equipment, lost cones and various accessories. The standard set is equipped for drilling to a depth of up to 10 m.
| Drilling diameter | 7 cm |
| Maximum sample depth | 10 m |
| Package size | 145 x 60 x 50 cm |
| Weight | 215 kg |
