DRILLWELL drill rods are manufactured from cold drawn seamless steel tubing and the couplings are manufactured from heat treated alloy steel.. The physical and chemical properties of the materials used in the manufacture of rods and couplings are in accordance with ISO 3551 -1.1992 and BS4019 Pt.3. 1992 Standards.
The most stringent quality control measures are employed during the whole manufacturing process Straightness is controlled to 1 :1200 or better.