OCTG Tubular

API-5CT EUE Tubing Pipe

The API external-upset-end (EUE) tubing pipe is broadly used due to the fact that is a good, serviceable interconnection in the majority of wells.

Without the need of modifying the actual thread shape, the joint dimension will increase because of upsetting procedure. The EUE joint features a designed joint strength in tension and pressure strength much higher than that of the pipe overall body and, as a result, is considered a 100% joint effective connection.

To enhance seal efficiency of API EUE tubing in high-pressure system, a grooved coupling, which accepts nonmetallic seal rings, is quite often applied in the coupling 

API-5CT Integral-joint Tubing Pipe

Integral-joint Tubing PIpe

Integral-joint tubing upsetting at one end, external threading, and external upsetting at the other end, internal threading.

API integral-joint tubing provides 10-round form together with a joint strength which is less than the body minimum yield, this reduces its use.

The small OD of integral-joint tubing enables its use inside of larger tubing strings or inside of wells as unloading or vent strings.

The couplings will need to meet all the minimum specifications outlined in API Spec. 5CT. 

API-5CT NUE Tubing Pipe

API non-upset (NUE) tubing is put to use much less than EUE tubing.

The cost of NUE is usually just a bit less than EUE, along with the joint strength is substantially less. The coupling joint diameter of NUE is less than EUE, which provides certain benefits in cases where clearance is small.