TD series of lifting nipple

Lifting nipple is used as connecting the pipe string such as shoulder-less drill collars, which is made of high-strength structural alloy steel after heat-treatment. Its mechanical properties could meet the mechanical performance requirements of drill collars with the connector buckle made according to API standard. The lifting nipple can be distinguished into two types as inclined platform shoulder and straight platform shoulder according to the shape of upper section of the platform shoulder. Technical parameters number nominal size mm (in)IDmmJoint threadAPIOD of Drill rodmm (in)OD of clipmm173.0(2 7/8 )44.5NC2688.9111.1288.9(3 1/2 )54.0NC31104.8127.0388.9(3 1/2 )68.3NC38127.0127.04127.0(5)82.6NC46165.1168.35127.0(5)95.3NC50177.8168.36127.0(5)95.36 5/8 REG209.6168.3