P series double-tube swivel type of core barrel is widely used in
engineering geological prospecting drilling and core drilling. This core barrel can effectively increase core recovery and
intactness. Triple-tube core barrel, split inner-tube core barrel,
and extend inner-tube core barrel are its derivative products. They
can satisfy separately the sampling demand of core drilling,
engineering geological and hydro-geological prospecting, inspection grouting pile and sampling of soft
foundation treatment.
Features 1. Inimitable single-acting structure design provides good
single-acting performance, reliable sealing property and long
service life. 2. Fitting up an adjustable mechanism of inner-tube (sampling tube)
assembly to adjust its axial position according to geological
condition, This structure design is good to raise the core
recovery. 3. Fitting up a check valve, such structure is advantageous to
enter core into sampling tube. 4. Fitting up an upper wear-proof centering stabilizer to increase
the core barrel rotary stability and reduce its wear.
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