Conventional Coring ES-D
- The shortest distance from top of bit to edge of inner extension for reducing the core jam.
86 x 70 ES-D 1.5m 157.0mm 66 x 50 ES-D 1.5m 157.0mm 86 x 70 GWS 1.5m 174.5mm 66 x 50 GWS 1.5m 177.0mm Difference 17.5mm Difference 20.0mm - The ES-D bit with shell (=reamer function) is available
- The fluid flow area is wider than GW & GWS series, therefore ES-D can be used polymer adding water such as Bentonite
- Correspond GWS swivel head
- Strongly recommend to use the head reamer together
- Easy to set up, just install above the swivel head
GWS Swivel head Head reamer 
- Wear reduction of core tube & prevent to vibrate
- To keep the hole straight of drilling
- Easy to set up, just install above the swivel head
To improve more core recovery for different foundation, even using same core barrel.
