... union, drill pipe, drill collar, safety clamps, elevator, mud pump and stabilizers for water well, oil field, construction, geothermal, directional ... are two kinds of model of safety clamps. Model WA-C Safety clamps can accommodate pipe from 3 1/ ... drill collar.2 API Standard3 Material:steel4 Type:WA-C,WA-T.5 WA-C accommodate pipe from 3 1/2 ... /8)1441.892 292.1-230.7(111/2-125/8)1544.097 317.5-346.1(121/2 ...