Shengli Oilfield Tongtai International Trading Company, Based in
the second largest oilfield of China.We supply: API standard Casing; Tubing; Pipeline; Sucker rod; Drill pipe;
Drill collar; Coupling; Pup joints and other equipments used in oil
and gas fileds. Casing 1> API-5CT; 2>Threads STC;LC;BTC; 3>Steel grade:
J55,K55,L80,N80,T95,P110; 4>Length range:R1,R2,R3;
5>OD:5¡±,5-1/2¡±