API 7-1 Oilfield Fishing Tools Drilling Junk Sub

Junk sub is a special tool for catching the heavy iron flings or grits which are too heavy to be completely circulated out of the hole.It is important for bottom-hole cleaning,ensuring the normal work of the bit and service life.
Because of the different interspace to the wellbore between the cup OD and the rim of cup,the fluid speed dropped promptly and form a vortex,meanwhile,the carry ability of fluid also dropped.So the heavey objects in the fluid will fall into the cup and caried out in the trip process.
Junk sub is a special tool for catching the heavy iron flings or grits which are too heavy to be completely circulated out of the hole.It is important for bottom-hole cleaning,ensuring the normal work of the bit and service life.
Because of the different interspace to the wellbore between the cup OD and the rim of cup,the fluid speed dropped promptly and form a vortex,meanwhile,the carry ability of fluid also dropped.So the heavey objects in the fluid will fall into the cup and caried out in the trip process.
Junk sub is a special tool for catching the heavy iron flings or grits which are too heavy to be completely circulated out of the hole.It is important for bottom-hole cleaning,ensuring the normal work of the bit and service life.
Because of the different interspace to the wellbore between the cup OD and the rim of cup,the fluid speed dropped promptly and form a vortex,meanwhile,the carry ability of fluid also dropped.So the heavey objects in the fluid will fall into the cup and caried out in the trip process.
Specification
Model Hole Size (mm) Cup OD mm(inch) Sub OD mm(inch) ID mm(inch) Conn.
SLB94 108~117.5 94(3 45/64) 79.3(3 1/8) 20(25/32) 2 3/8REG
SLB102 117.5 ~ 124 102(4) 92(3 5/8) 32(1 1/4) 2 7/8REG
SLB127 152.4~162 127(5) 105(4 1/8) 38(1 1/2) 3 1/2REG
SLB168 165~ 190.5 168(6 5/8) 146(5 3/4) 57(2 1/4) 4 1/2REG
SLB203 235~ 279.5 203(8) 168(6 5/8) 57(2 1/4) 4 1/2REG
SLB229 254~305 229(9) 197(7 3/4) 71(2 13/16) 6 5/8REG
SLB330 374.7 ~444.5 330(12 63/64) 241(9 112) 76(3) 7 5/8REG