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.