Its body is made of modified alloy steel, fully heat treated to 285-341 Brinell hardness and 54J minimum impact strength. Connections are cold rolled, phosphatized, coated and equipped with protectors and are gagged to API Standards. Its body is inspected on an ultrasonic control unit over its full length and section. The original cutter and block assembly allows easy replacement of cutters by rig crews.
Three different types (T, F and B) of cutters are offered.
Type T: Milled, machined with hardfaced sharp teeth for soft formations.
Type F: Milled, machined with hardfaced flat teeth, for medium hard formations.
Type B: Equipped with pressed-in tungsten carbide buttons, for hard formations