Profile: Xi'an Metal & Mineral Import & Export Co., Ltd. deals with metal & mineral products. We supply hole drilling tools used for oil & gas industries. Our production range covers a wide assortment of oilfield drilling tools, such as drill collars, stabilizers, stabilizer forging, drilling reamers, drill pipes, HWDP and hole openers. Drill collar is a length of extra heavy wall drill rods or pipes connected to a drill string directly above the core barrel or bit. Our drilling reamer is used for all kinds of reaming stabilization in drilling operations, especially the function of stabilization in drilling of the abrasive formation. Our fixed diameter hole opener is made of tough heat treated alloy steel for maximum strength. Cutter arms, equipped with removable cutters, are hard-faced and welded on the body. They are available in three types, type SM for soft to medium formation, type MH for medium to hard formation and type XH for hard formation. The hole openers have three or six jet tubes with replaceable nozzles, so that jet streams quickly clean the enlarged hole