Specifications

Material: AISI 4145H
Size: see the table
Usage: remove the sand of the drilling tools

Junk sub is applied mainly to fish the heavy drilling cuttings and the metal fragments that couldn’t be brought by fluid circulation. It possesses an important function to keep drilling hole clean, to increase the bit service life, to reduce and prevent the unexpected drill bit damage.

 

Type	Well diameter (mm)	Conn	I.D (mm)	O.D  (mm)
NLB94	108~117.5	2-3/8 REG	19	94
NLB127	152.4~162	3 1/2 REG	38	127
NLB190	229~273	4-1/2 REG	57	190
NLB245	292~330	6-5/8 REG	76	245
NLB340	386~456	7-5/8 REG	73	340