It suits to be used in the fields of oil and gas field,coal field, hydrology,geology and prospecting,etc,it is made of high strength quality materials,manufactured with advanced technology such as medium-frequency heating,hydraulic pressure upsetting,special-
purpose shaped tool,etc.Inspected by State standard,reliable quality can satisfy you.We

can offer all kinds of drill rods with different specifications,and can also manufacture according

to the specification provided by the clients.