- Current Issue
- Buyer's guide
New Products Introduced At UCT 2014
The Viper RockReamer cutter is secured in place with an internal, protected boss on the top and bottom of the cutter. Even with worn bearings and hours of abuse, the cutter will not separate from the body unless the arm is worn and broken.
“That is where the Viper gets even better,” said John English, president, Horizontal Technology Inc. “Split bit arms are only slightly under gage and are very thin. The cuttings, always present, on the bottom of HDD holes consistently eat away at the cutter gage and back of the arm causing premature weakening, fatigue and failures. The steel on the Viper arm is noticeably larger and thicker creating the most secure cutter possible. When you combine the strength and added gage clearance with the toughest, largest hard metal protection you have extended the hole opener life substantially.
“Speed and weight create friction and, other than the wear created by contact with rock and loose cuttings, this bearing wear determines the life of the cutter,” he added. “A 12 ¼- bit has three relatively small cutters that will fit inside a 12/14-inch hole. If the rotary is 90 RPM, the individual split bit cutter may be rotating over 140 RPM on its own axis. If the same cutter is used on a 36-inch split bit it may be rotating in excess of 300 RPM on its own axis. Viper hole openers have massive bearings to allow more weight with less torque. The size of the cutters reduce the individual cutter rotation speed in every size hole. This reduces friction and expends cutter life. If used at the proper weight and rpm, the Jumbo Viper will provide in excess of 200 opening hours.”
The Viper RockReamer is available from 8 ¾ inches to 72 inches in TCI or MT cutter configurations. Viper RockReamers have field replaceable arms and cutters or, for those who prefer a tool not adjustable in the field, it can be ordered with fixed arms requiring a weld process to replace the cutter and arm assembly.
Herrenknecht provides the highest safety standards on its newest HDD mega rig generation including anti-slip coatings at the critical points where pipe assembly personnel tend to slip during drill pipe assembly as well as emergency stop switches. This is the result of a very detailed risk analysis done for every piece of equipment including the valuable input of the various contractors using the equipment on a regular basis.