Product Description
It is very difficult to drilling for auger bit or rotary drilling bucket to cut boulder and hard permafrost directly .As a result, drilling barrels are designed to work together with drilling augers and chleaning bit.
Structure :
The drilling barrel is classified into coring type and non-coring type .
Depending on the formation to be dilled , it can also be divided into truncated teeth type for weathered bedrock permafrost , and type for hard bedrock .
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