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Singlewall Corebarrel Sampler - Detail view
Singlewall Corebarrel Sampler - Detail view

Dual Wall CoreBarrel Samplers

The Dual Wall CoreBarrel sampler is designed to take high quality samples in formations that are normally very difficult. It works best in formations containing harder layers or boulders. It can even handle very soft alluvial formations that transition into hard material.

  • Improve sample quality and recovery in harder and mixed formations
  • Do not flush away the fine material in a sample
  • Never miss any layer
  • A monitoring well can be installed directly after sampling through the casing
  • No deviation in formations with boulders and hard layers
  • Very accurate sample of overburden intersection going over into hard bedrock


The Dual Wall CoreBarrel Sampler has an annular space in the barrel that allows a medium to be used without washing away the fine material. The Dual Wall CoreBarrel Sampler is suitable for taking drill cores in harder geologies. If you want to take drill cores in medium hard geologies, we recommend the Single Wall CoreBarrel Sampler.

A front or side outlet is available for the choice of ring bits; the frontal version is used in homogeneous hard formations, while the side outlet version is intended for mixed formations, and prevents fine material from being washed away. A casing prevents the borehole from collapsing when the sampler is emptied. The cores are sampled directly in the core barrel. The sample can be extruded in polyethylene foil tube, plastic gutters or core box. With the Dual Wall Core Barrel sampler, you have the ability to perform SPT testing in between samplings. 

The Dual Wall CoreBarrel Samplers is now available in different diameters and lengths. You can get the following sizes from us: 

  • Dual wall CoreBarrel 68
  • Dual wall CoreBarrel 3.5"
  • Dual wall CoreBarrel 5"
  • Dual wall CoreBarrel 6.7"
The Dual wall CoreBarrel sampler is available in many variations for different drill rods and casings. Can't find the one you are looking for? Please contact one of our experts. They will be happy to help you. For all specifications please download the specification sheet. 


Dual Wall CoreBarrel Samplers
Available in different sizes CoreBarrel 68 / 3.5" / 5" / 6.7"
Max. depth No limit
Material used Steel
Esther Timmerman

Get in touch with our specialists

Need advice choosing the right product for your application? Our specialist Esther is happy to help.