The re-loader or double re-loader tank systems are used to store dry bulk material on board offshore rigs, Offshore Support Vessels or Self-Discharging Cement Carriers. The system uses several atmospheric hoppers/holds to store cement and/or drilling powders on the vessel. Vacuum is used to remove material from the hoppers/holds. The material enters a re-loader tank which is then pressurised to pneumatically convey the powder towards the surge tanks (offshore rigs), other bulk handling system (offshore support vessel to rig) or Storage facility (self-discharging cement carrier).
The re-loader tank system is named after its defining component, the re-loader tank.
After filling, the hoppers/holds serve as storage units until the material is required for the (drilling) operations. Each hopper/hold is fitted with a suction pipe. Negative pressure is generated inside the re-loader tanks, which are connected to the hopper/holds suction pipes. By opening the appropriate valves, bulk material is pneumatically conveyed to the re-loader tank. The re-loader tank is equipped with self-cleaning filters to fully separate the air from the bulk material. The vacuum is generated by a pre-inlet vacuum blower. Compressed air is supplied by a compressor and air dryer installation on board the vessel.
The system contains two or more segregated categories, effectively creating multiple separated systems. Each category contains all the machinery, valves, piping and other equipment required to operate. The segregation also prevents contamination if multiple materials are handled.
Double Re-Loader Tank system on board a platform supply vessel
• Hull-integrated storage tanks or freestanding modular design deck tanks
• Maximum volume and minimum footprint
• Fully automated
• No residue material in pipes
• Cost-effective high-volume solution
• Highly reliable pneumatic system
• Small pressure tanks, smaller risks