... K55, N80, L80, P110 2.Thread: EUE,NUE,BTC, 3.Standard: API 5CT 4.Origin: China API Tubing and Casing ... L(mm)Weight (kg)Tubing Coupling2-3/8”NUE73.02*107.951.282-3/8”EUE77.80*123.821.552 ... 4-1/2”, Casing coupling from 4-1/2” to 13-3/8”TYPE: NUE, EUE (tubing coupling), STC, LC, ... oilfield and other oilfields. Until now, we have established a stable supply relationships with them. For overseas market, our ...