NQ HQ PQ core barrel head assembly and overshot

Description

Forsun manufacture differenct types of the core barrels with high quality. 

Size Available:

B*6 core barrel, B*6 core barrle, B**1 core barrel, B**1 core barrel, B**6 core barrel
BQ core barrel NQ core barrel, HQ core barrel PQ core barrrel, NQ3 core barrel, HQ3 core barrel, PQ3 core barrel
TT**6 core barrel TT*6 core barrel
T***6 core barrel, T***6 core barrel, T***6 core barrel, T***6 core barrel, T****1 core barrel
T***6 core barrel T***6 core barrel T****1 double/triple tube core barrel T****6 double/triple tube core barrel T****1 double/triple tube core barrel, T****1 core barrel
T6S core barrel etc.
NMLC double/triple tube core barrel, HMLC double/triple tube core barrel
HWF double/triple tube core barrel, PWF core barrel
NWG single/double tube core barrel, HWG single/double tube core barrel
NX single/double tube core barrel, HX single/double tube core barrel
LTK*8 core barrel
M**1 core barrel
**2 F core barrel

Chinese Standard: Wireline *6, wireline *9, wireline *5, wireline *1...
 

Wireline drilling is the special method of removing the core. When the driller wants to remove core from a conventional core drill, the entire core barrel has to be removed from the hole. This is time-consuming, as each rod has to be removed one at a time. With wireline drilling, a barrel of core can be removed from the bottom of the hole without removing the rod string. When the driller wants to remove the core, an overshot is lowered on the end of a wireline. The overshot attaches to the back of the core barrel inner tube and the wireline is pulled back and the inner tube disengages itself from the barrel.