Drill cuttings management system, especially when it comes with proper professional service, personnel, will help the client save time, money and reduce the HSE footprint of drilling operations, in the whole process, in any way, need puts safety and environment first, and simplify as much as possible. GN drill cuttings managment system normally includes:
- High G shale shaker, and or vertical cuttings dryer; scalping the big particles, save as much fluid as it can, and make the cuttings as dry as possible.
- Decanter Centrifuge, with decanter centrifuge, somtimes chemical dosing unit also, to separate the small particles in the fluids after the first step.
- All the augers, pumps for necessary transportation.
- Standard or customized cuttings box
Using GN drill cuttings management system, you can reduce clean-up costs by eliminating the spread of solidification agent and invert across the lease. Optimize the solidifying agent to cuttings ratio helping to reduce costs in materials as well as the overall volume of waste sent for disposal. Simply, our drill cuttings management equipment will help to save time, money and reduce the HSE footprint of drilling operations. GN drill cuttings management system have been used for many countries, in many different sites, some site have sent us their reports for innovation purpose, that would be very helpful, and if you are the one using it, any of your feedback will help us improve our products.
TBM is important in the city construction project like subway and pipe laying. In order to bring out the cutting and lubricate the drill bit of the tunneling machine, the operators need to add large quantity water or drilling fluids into the drilling well. For economy reason, saving cost, improve efficiency, the operators also have to think about reusing of the drilling fluids.
Normally a whole system will include, a desanding unit, a big bowl centrifuge, a dosing unit.
Firstly the slurry goes to the scalping shaker, with coarse sieve screens, the big particle solids will be separated, then pumping to the desander cones, most of the sands etc will be separated.
After several time recycling, the specific gravity of the drilling fluids would be higher and higher due to the built up of ultrafine solids that even cannot be removed out by using only the centrifuge unit. Operators need to add chemicals into the drilling fluids and then do the dewatering process.
Removing the ultrafine solids from the drilling fluids greatly reduces the consumption of water and increase the drilling efficiency. The dewatering centrifuge package can also be used inoil sludge treatment project for oil recovery.
As for the system layout, we got several options, basically place the desanding unit, and dewatering package together, while with storarge tanks, water tanks, we got many different combinations.
Recently we finish the construction waste management system commissioning, and now the whole system is alive operating. The basic principle is still the same, we are separating the solids and liquid. As for this specific project, the client is collecting many different kind of waste from civil construction projects.
So here is the separation hub, when the trucks bring waste, any kind of; they dump to the hopper which designed under a deck for easier operation; follow the hopper, the waste goes to the coarse shaker, equiped with robust steel wire sieves, to separate the big size particles. The next step is a GN normal shaker, with finer mesh hole size, to separate the smaller solids, then to desilter, to centrifuge, same story, through tank, feed by pumps.
For this specific application, Hi G dryer shaker have been used. On one mud tank, GN’s high G force drying shaker is fixed on the first compartment of the tank. The liquid pumped from the tank beneath the coarse screen will be separated again by the drying shaker for fine particles removing and water recovering. For better performance, GN’s shaker is fixed with composite frame screen panel and oil resistance rubber seal strip. This extends the continuous working period and reduces the maintenance frequency.
As to help the performance of decanter centrifuge, it comes with a dosing tank, adding polymers to thicken the silt and make it easier to separate. the decanter centrifuge is provided with telescopic skid. The slurry treated by the cyclone unit would be fed to the centrifuge for polishing. The ultrafine solids cannot be removed even by high speed decanter centrifuge.
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It is always not easy trip to get big tenders, after few months' documentation preparation and request following up, GN finally was awarded the tender of solids control equipment for 16 drilling rigs in Ukraine.
The client was planning to upgrade the existing mud recycling system by replacing the old equipment. This tender includes 30 units decanter centrifuges, 30 units shale shaker and mud cleaners, and 6 units vacuum degassers.
Shale shakerand mud cleaner are the equipment use to remove the large size drilling cuttings in the drilling fluids. GN's shale shakers model of GNZS594E-HB which is especially designed for the oil and gas drilling with weir feeder to buffer the high pressure impact for protecting the shaker screen. The screen deck of the shaker is adjustable from -1°to +5°,operator could even adjust the shaker deck during running of the shaker. With the G force up to 7.5, the shaker could greatly dry the solids for drilling fluids recovering. The cyclone manifold is bolted fixing on the shaker unit and could be removed for easy transportation and installation.
Vacuum degasserunit is installed after the shale shaker and before the mud cleaner. It is used to remove the gas in the gas cut in drilling fluids. By removing the gas, the vacuum degasser could ensure the drilling fluids with a proper gravity. And the centrifugal pump could transfer the drilling fluids to the cyclone unit with sufficient pressure.
Decanter centrifugeis used to remove the fine solid particles in drilling fluids. The client equipped 2 unit centrifuges for each of the drilling rig. When drilling, the decanter centrifuge with low speed could be used for barite recovery, and the other centrifuge with high speed would be used for ultra-fine solids separation.
To make sure the project operate smoothly, the equipment have been divided into 4 batches for delivery. The remaining units are still under fabrication progress.