• Lost tips, adapter and casing tubes
  • Lost tip drilling method in the field
  • Insert hammer heads
  • Complete range of wedge clamps in various sizes
  • Steel reinforced plywood support plate
  • 60 kN two bar manual puller for tubes up to 85 mm
  • Gedore pipe wrench
  • Robust aluminium steps with 4 extra wide treads
Gouda Geo-Equipment B.V.
Satellietbaan 8
2181 MH Hillegom
The Netherlands

Downloads

No downloads available

Lost Tip Drilling Method (Hammer)

When soil sampling and profile description is not required, the drilling procedure can be executed fast and efficiently by applying the lost tip drilling method.
 
The lost tip is hammered into the ground using a Wacker gasoline motor hammer, which is placed on top of the casing tubes.
 
The lost tip assures a very straight bore hole that is slightly larger in diameter than the casing in order to reduce lateral friction on the string of tubes. This makes it possible to reach greater depths.
 
On reaching the desired depth a filter tube / piezometer standpipe can be lowered through the string of casing tubes. Subsequently the string of casing tubes can be retracted using the 2-person operated rod puller in combination with wedge type pulling clamp.

 
Applications

The lost tip drilling method is successfully applied to place small diameter monitoring well pipes for environmental research. The lost tip remains in the soil when the string of casing tubes is retracted. This does not cause any environmental issues as the lost tip is manufactured of cast iron.
 
The complete set comprises the following items:

Piezocone Dissipation test Water level meter CPT crawler CPT Electric cones Seismic CPT Magnetometer Gouda Jacket cone Soil sampler Dynamic penetrometer Cone Penetration Testing Piezometer CPTU Inclinometer
CPT truck Crawler-Truck Begemann cone Vane tester