Oilfield Tubing

We offer a wide variety of oilfield tubing according to API standards directly from China.

Tubing Specifications

O.D. (in) Grade Tubing Nominal Weight (lb/ft) Wall Thickness s (in) Inner Diameter r (in) Drift Diameter (in) Tubing Thread Coupled O.D. (in)
Non- Upset External- Upset Non- Upset External- Upset
2 3/8 J55 4.00 -- 0.167 2.041 1.947 2.875 --
2 3/8 N80 4.00 -- 0.167 2.041 1.947 2.875 --
2 3/8 L80 4.00 -- 0.167 2.041 1.947 2.875 --
2 3/8 C95 4.00 -- 0.167 2.041 1.947 2.875 --
2 3/8 J55 4.60 4.70 0.190 0.1995 0.1901 2.875 3.063
2 3/8 N80 4.60 4.70 0.190 0.1995 0.1901 2.875 3.063
2 3/8 L80 4.60 4.70 0.190 0.1995 0.1901 2.875 3.063
2 3/8 C95 4.60 4.70 0.190 0.1995 0.1901 2.875 3.063
2 3/8 P110 4.60 4.70 0.190 0.1995 0.1901 2.875 3.063
2 3/8 N80 5.80 5.95 0.254 1.867 1.773 2.875 3.063
2 3/8 L80 5.80 5.95 0.254 1.867 1.773 2.875 3.063
2 3/8 C95 5.80 5.95 0.254 1.867 1.773 2.875 3.063
2 3/8 P110 5.80 5.95 0.254 1.867 1.773 2.875 3.063
2 7/8 J55 6.40 6.50 0.217 2.441 2.347 3.500 3.668
2 7/8 N80 6.40 6.50 0.217 2.441 2.347 3.500 3.668
2 7/8 L80 6.40 6.50 0.217 2.441 2.347 3.500 3.668
2 7/8 C95 6.40 6.50 0.217 2.441 2.347 3.500 3.668
2 7/8 P110 6.40 6.50 0.217 2.441 2.347 3.500 3.668
2 7/8 N80 7.80 7.90 0.276 2.323 2.229 3.500 3.668
2 7/8 L80 7.80 7.90 0.276 2.323 2.229 3.500 3.668
3 1/2 H40 9.20 9.30 0.254 2.992 2.867 4.250 4.500
3 1/2 J55 9.20 9.30 0.254 2.992 2.867 4.250 4.500
3 1/2 N80 9.20 9.30 0.254 2.992 2.867 4.250 4.500
3 1/2 L80 9.20 9.30 0.254 2.992 2.867 4.250 4.500
3 1/2 H40 10.20 -- 0.289 2.922 2.797 4.25 --
3 1/2 J55 10.20 -- 0.289 2.922 2.797 4.25 --
3 1/2 N80 10.20 -- 0.289 2.922 2.797 4.25 --
3 1/2 L80 10.20 -- 0.289 2.922 2.797 4.25 --
4 H40 9.50 -- 0.226 3.548 3.423 4.75 --
4 J55 9.50 -- 0.226 3.548 3.423 4.75 --
4 N80 9.50 -- 0.226 3.548 3.423 4.75 --
4 L80 9.50 -- 0.226 3.548 3.423 4.75 --
4 1/2 H40 12.60 12.75 0.271 3.958 3.833 5.200 5.563
4 1/2 J55 12.60 12.75 0.271 3.958 3.833 5.200 5.563
4 1/2 N80 12.60 12.75 0.271 3.958 3.833 5.200 5.563
4 1/2 L80 12.60 12.75 0.271 3.958 3.833 5.200 5.563

Non-Upset Tubing: Coupling and Thread Specifications

Tubing O.D (in) Coupling O.D.
W (in)
Length NL (in) Recess Ø
Q (in)
Recess Depth q (in) Bearing Face Width
b (in)
Hand- Tight Standoff A Coupling Power- Tight Make-up
J (in)
No. of Threads per inch Tubing Weight (lb)
2 3/8 2.875 4 1/4 2.438 5/16 3/16 2 0.500 10 2.82
2 7/8 3.500 5 1/8 2.938 5/16 3/16 2 0.500 10 5.15
3 1/2 4.25 5 5/8 3.563 5/16 3/16 2 0.500 10 8.17
4 4.75 5 3/4 4.063 3/8 3/16 2 0.500 8 9.58
4 1/2 5.200 6 1/8 4.563 3/8 3/16 2 0.500 8 10.77

External-Upset Tubing: Coupling and Thread Specifications

Coupling power-tight make-up J (in) = 0.500, threads per inch = 8

TubingO.D (in) Coupling O.D.
W (in)
Length NL (in) Recess Ø
Q (in)
Recess Depth q (in) Bearing Face Width
b (in)
Hand- Tight Standoff A Tubing Weight (lb)
2 3/8 3.063 4 7/8 2.656 3/8 5/32 2 3.43
2 7/8 3.668 5 1/4 3.156 3/8 7/32 2 5.30
3 1/2 4.500 5 3/4 3.813 3/8 1/4 2 9.03
4 5.000 6 4.313 3/8 1/4 2 10.63
4 1/2 5.563 6 1/4 4.813 3/8 1/4 2 13.33