Month: July 2020

WBM waste treatment main equipments including drilling cuttings drying shaker, high speed/ VFD decanter centrifuge, drilling cuttings solidification unit, chemical dosing unit, the basical working process is as below:

2 units of drying shaker standard modular to be installed under the solids control shale shaker to pick up the water based mud drilling cuttings, the cuttings collection box is equipped for each drying shaker to collect the waste. The discharged fluids dropped into the catch tank under each drying shaker through shaker screens, the feeding pump transfer the fluids to VFD decanter centrifuge, which is installed on the telescopic skid with VFD control panel, the feeding pump is also installed on the centrifuge skid. The fluids from decanter centrifuge flow to intermediate tank ,the submersible slurry pump transfer the fluids back to solids control system reserve tank.

The discharged solids from drying shaker, decanter centrifuge, and the drilling waste collected by screw conveyor from desander, desilter, solids control decanter centrifuge are all feed to cuttings solidification unit, mixed with cement and lime (solidifying agent) in the vessel to get the dry disposal material, the solidified drilling waste can be used for landfill since the hazardous material will not leak, it is safe for landfill.
If the treated fluids will not be reused to prepare for new drilling fluids, and the user want to get pure water, chemical dosing system with VFD dewatering centrifuge will be used, the decanter centrifuge can separate cut point up to 1 microns by adding flocculants. The decanter centrifuge is drived by VFD control panel with self cooling system or air conditioner, which is positive pressurized, 3 VFD including main motor, back drive motor, pump motor.
If you need a customized solution for water based mud drilling waste treatment system, pls contact with GN solids sales engineer.

As the professional manufacturer of TBM slurry separation plant in China, GN Solids control can design and produce mud cleaning/ recycling/ mixing tank system for all kinds of solids and liquid separation applications. An efficient TBM slurry separation plant is the successful use of slurry supported tunnel boring machine (TBM) and pipe jacking machines. Normally the TBM projects are footprint limited, GN designed TBM slurry separation plant is with compact design and reliable performance, convenient maintenance.

Main features of GN TBM slurry separation plant:
1) Compact footprint, reliable working
2) Easy transportation, containerized size for convenient movement, the user can easily move it from one project to another.
3) 5 phase separation system for better result
4) Economic proposal and high configuration proposal for option based on different requirement

For example, if the project required solids separation cut point is only 45 microns, we will suggest economic proposal for GNMS-500D and GNMS-1000D, the treating capacity is 500gpm and 1000gpm, the desander cone installed on the double deck shale shaker, the feeding pump can feed to mud to desander cone and also work as transfer pump, the control panel also installed on the same unit. The mud discharged from desander cone dropped down to the mud tank as intermediate tank, it will flow to the storage tank finally.
If the client need a high configuration proposal with bigger treating capacity and the cut point is below 20 microns, we will provide GNTBM-240, GNTBM-360, GNTBM-500 models, for example, if the client required capacity is 800m3/h capacity, we will use GNTBM-360 with GNTBM-500 as combination system. If the user required capacity is 1000m3/h, we will use 2 units of GNTBM-500 slurry separation plant. And so on, 1500m3/h slurry separation unit with 3 units of GNTBM-500 system.
For more details, pls contact with GN solids sales.

As one of the professional manufacturer of solids control system, drilling mud cleaning system, drilling waste management system in China, GN solids control can produce mud cleaning system for both onshore and offshore project, we can make customized design for different requirement. Recently one unit of customized design mud cleaning system are ready for shipment to our customer, the technical configuration is as below:

1) Linear motion shale shaker: it is the first phase cleaning to reduce the solids content and separate coarse solids from the drilling fluids, the operator can use different API mesh shaker screens to adjust the density, viscosity of the drilling fluids to meet drilling requirement, a good performance shale shaker can reduce the drilling waste effectively. The 2ea Italy Oil brand vibration motor drive the shale shaker, the shaker screen fixed by wedges, the shaker deck bottom is made of stainless steel for better corrosion resistance.

2) Linear motion mud cleaner including desander cone, desilter cone and bottom shale shaker. desander cone is the second phase cleaning, desilter cone is the third phase cleaning, the desander cone and desilter cone are made of 100% PU for longer working life, the composite material frame shaker screens can last longer and the effective screen area is larger, the separation performance is better, the storage period can last longer.
3) Centrifugal pump, which can be used as mixing pump, desander/ desilter feeding pump, transfer pump, charging pump, trip pump, it is installed inside the frame for convenient transportation and lifting from land to offshore rig platform. The lifting pad can be certified by DNV as per client’s requirement. The pump casing and impeller material is ductile hard alloy for better abrasion resistance.
If you required drilling mud cleaning system for onshore or offshore project, pls contact with GN solids engineer.

Recently GN solids control shipped one unit of dewatering unit to Africa, the client already bought dewatering centrifuge from GN before, he needs to use chemical dosing unit for new projects, considering the hot temperature weather in Africa, we put the dewatering unit into standard container for convenient transportation and water/ sun proof, the container with windows, doors, air conditioner, lightings. The dewatering unit including three tank automatical powder polymer mixing system and Coagulant mixing tank, the user can use either flocculants or coagulant for different purpose.

The working process is as below:
The powder chemicals are adding into the hopper for mixing and aging, the 3 tanks ensure the continuous operation, the chemical dosing pump transfer the mixed chemicals to centrifuge feed tube, and mixed in the Static mixer before feeding to the dewatering centrifuge feed tube. The most popular model is GNLW363C-VFD, the bowl diameter is 14 inch, the bowl length is 50 inch, the max speed is 3900rpm, the normal working speed is 3200rpm, the max G force is 3063G, the typical G force is 0~2062G, the mechanical separation cut point is 2~5 microns, by working with dewatering unit, the separation cut point is up to 1 microns, most of the ultra fine solids can be separated out, the customer can get pure water and drier solids for final disposal.

The VFD control panel drive the main motor, back drive motor and pump motor to set bowl speed and differential speed, the pump speed can be also adjusted to adjust the feed flow. The PLC smart control and HMI interface ensured the automatically operation.
Except for GNLW363C-VFD, we also have GNLW453-VFD and GNLW553-VFD and GNLW674-VFD decanter centrifuge for option with larger treating capacity. If you need a dewatering centrifuge unit solution, pls contact with GN for more information.

As one of the professional manufacturer of solids control equipments and drilling waste management system in China, GN solids control also design and produce drilling cuttings transfer system based on different drilling rig floor plan. Basically the way to transfer drilling waste including screw conveyor system, cuttings vacuum pump and cuttings transfer pump.
1) Screw conveyor system: it is widely used to collect and transfer drilling waste from solids control equipments to drilling waste management system, but it is also limited when liquid moisture is very high, it is easily leakage and flow back, and the space requirement is too big, especially for offshore rig, when space is very limited, and power consumption is higher compared with other ways. But it is more popular way right now. There are 2 installation ways, the first one is to use the excavator to dump the drilling waste to the collection hopper of the screw conveyor when there is a waste pit, then the screw conveyor transfer the drilling waste to vertical cuttings dryer ( for oil based drilling waste) or high G drying shaker( for water based drilling cuttings). The second installation way is that there is no waste pit at rig site, the screw convetor ( horizontally installed) to collect the drilling waste from shale shaker, desander, desilter, then a slantly installed screw conveyor to transfer them to the drilling waste management system.
2) Vacuum pump can be used to transfer drilling cuttings from waste pit to screw conveyor collection hopper, or transfer to vertical cuttings dryer directly, an air compressor is required to supply air to operate the vacuum pump, since the required air compressor model is very big, which limited the utilization of the vacuum pump, but the space required is small.
3) Cuttings transfer pump is a new pump introduced for cuttings transfer when space is very limited. For more information, pls contact with GN solids control.