US-based Laversab recently introduce certified Class 1, Division-1/Zone-1 & Class 1, Division- 2/Zone-2 computers for harsh environments.
Today, computers are almost ubiquitous on drilling rigs. They are used for a variety of operations like Measurement While Drilling (MWD), Logging While Drilling (LWD), Electronic Drilling Recorder (EDR), Mud logging, Mud pumping, Cementing, Fracturing, monitoring Top-Drives, Blow Out Preventers (BOP), Mud-Pits and many other functions. Computers placed on the rig-floor must be certified for deployment in Hazardous Locations or Explosive Atmospheres as defined by international safety standards. All Laversab Computers, Driller’s Displays and Smart Terminals are certified for use in Class 1, Division 1/Zone 1 or Division 2/Zone 2 areas.
Among the new products is the Model 2850 computer is designed for Class 1, Division-2/Zone-2 applications. The 2850 weighs in at 10 kg (22 lbs) and has a small footprint of 38 x 32 x 10 cm (15 x 12.5 x 4 inches). It features a dual-core Intel Atom processor and uses a solid-state drive for storage, enabling it to withstand severe vibration. The 15-inch sunlight-readable display with auto-dimming, coupled with a touch-screen, provides an exceptionally clear, crisp and easy to use human interface. Interfaces include Ethernet, 900MHz wireless with 1 watt transmission power for reliable use over longer distances, dual USB ports, an RS232 or 485 connection. In addition, all connections are made using standard sealed circular connectors. An Intrinsically Safe (IS) keyboard is also available for applications where required.
The 2850 runs on 90-260 VAC power and connection is made through an approved connector. Environmentally, it operates from -40oC to +50oC, is impervious to salt-fog, is sealed to IP-65 standards and can withstand vibration of 3G RMS Its small footprint and light weight make it ideal for use in Zone-2 areas on the rig floor.
Others products are the the Model 3200 Driller’s Display unit, and Model 4100, which is a complete Directional MWD Surface System designed for C1D2/Zone-2 applications.