Casing is mainly used for drilling in ocean and desert to separate sea water and sand and ensure smooth drilling.
Casing pipeOD:4-1/2"-20"Connection:BTC LTC STC etcSteel grade:J55 K55 N80 L80 P110 etcStandard:API5CTContact:BonneXuEmail:BonneXu@dlpoctg.comSkype:BonnieXu22Linkedin:BonnieXuTel:+86-13602055205WeChat:13602055205 Hot Tags: J55 Casing, China, manufacturers, factory, in stock
