... steel tubes with threaded ends that are used to connect a drill rig’s surface equipment with its drilling equipment, or ... of a well. They are used to transport drilling fluid to drill bits, and to raise, lower and rotate the bottomhole ... 5633.575.5139.70.41510.54E, X, G, SIEU6 5/825.222.2133.046.625168.30.338.38E, X, G ... , SIEU6 5/827.7224.2436.066.625168.30.3629.19E, X, G ...