no9, Mudanjiang, Heilongjiang, China,
We are greatwall drilling tools co., ltd based in Mudanjiang, China. We member of TradeKey.com since March, 2011. Our business is related to Industrial Machinery industry and we specifically deal Drill collar, Heavy Weight Pipe, Kellys, Jars tools, stem ...
inside bop, drilling tools, fishing tools, well head tools, cementing tools, tool joint, marine casing cutters, casing cup testers , centralizer, floating collar, floating shoe, threeï,¼,?3ï,¼,?-point caliber gauge, integral spiral blade stabilizer, roller re