1.Standard:API7-1,API5DP 2.OD:2-3/8,2-7/8,3-1/2,4,4-1/2,5,5-1/2,6-5/8 3.Grade:E,X,G,S 4.Upset:EU,IU,IEU Our company supply high quality and API certified tool joint for drill pipes' connections. These tool joints are turned, bored and faced prior to heat treatment by the quench and temper process to produce a uniform microstructure, high ductility and other mechanical properties in accordance ...