Oil Well Casing Sizes

　　Model NO.: 20′′, 16′′, 18-5/8′′, 13-3/8′′, 9-5/8′′, 7′′

　　Technique: Hot Rolled

　　Surface Treatment: Varnishing

　　Section Shape: Round

　　Specification: 2-3/8"to 20"

　　Type: Seamless

　　Material: Alloy Steel

　　Usage: Drill Oil Well&Gas