... specially manufactures a series of API drill pipes and joints. Detaild Product Description:Drill Pipe :Grade:DZ50,E75,X95, ... 58-13.72mproductAPI oil drill pipes, Water well drill pipes, Flat drill pipes, Non-dig drill pipes,Geographical drill pipes and various tool ... wells drilling, Forepoling, coal and nonferrous metal mining projects Drill Pipe (E.X.G.S)Size (inch)WeightDesignationCalculated Plain- ...