Specifications

1,Tubing coupling and extend-upset tubing use the special clearance couplings
2,According API 5CT
3,EU & NEU
4,J55/K55/L80/N

Oil tubing coupling

       1      Buttress thread casing couplings and extend-upset tubing use the special clearance couplings

       2      With the same specifications for the different types of thread portfolio, portfolio collar.

       3      Appendix A8 (SR13) to seal ring groove, the seal ring to the collar.

       4      Non-upset and extend-upset tubing use special-bevel couplings

 

type	teeth/inch	specs
extend-upset tubing thread	10 teeth	1.0501.3151.6601.900

 

                  

                  1  Tubing thread casing  4 4¹/₂ non-upset tubing extend-upset 

                           teeth/inch, but the diameter of couplings boring are different.

                  2  Tubing round thread casing  coupling high gear  8teeth/in=1.81mm 

                          10 teeth/in = 1.41mm

                  3  Buttress thread casing high gear 5teeth/in=1.57mm

                  4  Casing round thread casing coupling high gear 8 teeth/in=1.81mm