1.Standard material to technical drawings
2.Suit for all formation
3.Cutting edge with R-chisels

It is mainly used in drilling from soil with high moisture content, soft silt, gravel layer to light-weathering rock and is divided into two types—bailer for soil and rock layer. Drilling Bucket can be designed into vertical bucket and conical bucket according to bucket diameter and drilling type as well as the drilling formation. The switching trigger could set to manual drive, engine drive and both of the two. Ordinarily, the backplane of the drilling bucket is made of high-tensile manganese plate. The cutting tools can be spade wearing proof alloy bucket lip which is suitable for drilling in soft and medium-soft soil layer, claypan and soil silt formation; can be cutting pick which is suitable for drilling in pebble stratum and solid soil layer and can be the combination of bucket lip and cutting pick that is able to drill in soft-hard interbedding and forceful cementation of pebble and gravel stratum.

The bottom of drilling bucket can be single and double backplane; the marl inlet could be single door and double door. Owing to the big opening, the drill with single door is applied to drill in the gravel stratum with larger diameter gravel as well as huge pebble and boulder formation. The double-door drill bit is suitable for drilling in normal sandy layer and small gravel stratum.

 The most important advantage of a core barrel is that it assists to concentrate the torque and crowd force on a small ring of cutting teeth.

Core barrels are generally divided into four types: