Author: gnadmin

Recently one set of CBM drilling rig mud solids control system are ready for shipment for coal development company. The technical configuration is as below:

1) 2 units of GNZS703F shale shaker to separate coarse solids from the drilling mud, the composite material frame shaker screens with stainless steel material wire mesh are installed on the shale shaker, the average working life is 300 ~ 700 hours, each shale shaker are drived by 2ea Italy Oli brand vibration motor, the total screen area for one shale shaker is 2.73m2, we can provide shaker screens from API 20 to API 325 for different client’s requirement.

2) 1 unit of GNZJ752F-1S desander cleaner with bottom shaker to separate the particle solids 45 microns to 75 microns, the treating capacity is up to 500gpm, the desander cone material is 100% PU for longer working life
3) 1 unit of GNZJ752F-8N desilter cleaner with bottom shaker to separate the solids size 20 microns to 45 microns, the treating capacity is up to 500gpm, the desilter cone material is 100% polyurethane for wear resistance

4) 4 units of Mud tanks, 2 ea shale shaker and desander, desilter are installed on top of mud tank, tank accessories and electric control system are attached.
5) 1 unit of Jet mud mixer, including venturi hopper and mixing pump
6) 3 units of Centrifugal pumps, which is 100% interchangeable with world famous brand pump, the pump casing and impeller are made of hard ductile iron for better abrasion resistance.
7) 1 unit of decanter centrifuge to separate fine solids from 5 microns to 7 microns, to reduce the solids content. The submersible slurry pump will transfer the clean fluids to decanter centrifuge from desilter compartment, the clean fluids are collected in the mud tank.
8) Several units of mud agitator

Recently GN solids control shipped one batch of screw conveyor and vertical cuttings dryer for international environmental Engineering company.

The screw conveyor is used to collect the drilling waste and transfer to vertical cuttings dryer, the discharged solids are also collected and transferred automatically to cuttings box. The vertical cuttings dryer are installed inside the container, with proper open on top for convenient maintenance and operation, and also open doors in proper place, the flushing pump of vertical G dryer and decanter centrifuge feeding pump are also installed inside the container to keep them working in warm temperature. The screw pump is from Netzsch brand single screw pump with explosion proof motor. The fluids treated by vertical centrifuge flow to storage tank, the decanter centrifuge feeding pump transferred the fluids to decanter centrifuge to separate more fine solids.

The screw conveyor is U type screw conveyor with rotating screw to move the material along the fixed casing continuously. We can make feed port and discharge port at any position in the length direction as per client’s requirement. Not only for drilling waste, the screw conveyor can be also used to in different industries, as food, medicine, chemicals, paper making, environmental solutions, construction industry and other industrial applications. To select a proper model screw conveyor, we need to know the required transfer capacity and power required and transfer length. We have 10 inch, 12 inch, 14 inch, 16 inch, 18 inch screw diameter for option, and divided each section as 12ft, we have 12ft, 24ft, 36ft and 48ft for option.

For GN screw conveyor: the screw flights are made of wear resistant and thicker manganese steel, and it is aso sprayed with wear resistant coating to prolong its working life. The bearing seats are made of aluminum casting for reliable performance.

The main equipment to be used for OBM waste treatment is vertical cutting dryer and decanter centrifuge, depends on different countries environmental regulation, the oil content required for drilling cuttings disposal is different, normally below 5% is acceptable for developing countries, below 1% is acceptable for developed countries. GN vertical cuttings dryer treatment result for the discharged solids is OOC 3% to 5%.We also have standard design for drilling cuttings dryer system as a compact package for convenient transportation and operation.

There are different ways of feeding system to vertical cuttings dryer, including vacuum pump, drilling cuttings transfer pump, screw conveyor system.
Vacuum pump is 100% air operated pump, it can be widely used for electricity power supply area, and the space requirement is very small. It is the ideal equipment to transfer drilling cuttings, sand, cement, drilling fluids, waste water, oil sludge, animal waste, etc. materials, and the suction distance is up to 50m and discharge distance is max 1000m, especially for the high solids content material.

Drilling cuttings transfer pump is drived by hydraulic cylinder and S-style distribution valve, it can be used to transfer high solids concentration material, less moisture, big solids size and high abrasion material.
Screw conveyor system is traditional drilling cuttings transfer way, normally one set of screw conveyor picked the drilling cuttings from shale shaker, desander, desilter horizontally, one set of screw conveyor is installed slantly to pick up the drilling cuttings from #1 screw conveyor and transfer to vertical cuttings dryer. The installation space is larger than vacuum pump and cuttings transfer pump.
The vertical cuttings dryer discharged fluids flow to intermediate tank and the centrifuge feeding pump feed the fluids to decanter centrifuge to separate fine solids, the mechanical separation cut point is 2~5 microns. The treated fluids can be recovery to solids control system to prepare for new drilling fluids.

Recently GN solids control shipped 2 sets of containerized vertical cuttings dryer system for OBM treatment to Russia. This is the repeat order from the Russia client, the technical specification is as below:
1) One unit of vertical cuttings dryer GNCD930E to treat oil based drilling cuttings

2) One unit of mud tank to storage the fluids discharged from vertical cuttings dryer, the mud agitator is installed on top of the mud tank.
3) One unit of 40ft standard container with proper window and doors, the handrails, stairs are equipped properly to meet HSE requirement. The bottom opening is for discharge of solids from vertical cuttings dryer discharge port, it will be collected by screw conveyor and transferred automatically to cuttings box. There is insulation materials inside the container inner wall to keep the equipments warm for continuous working in winter, when the environmental temperature is below -5 degree.

4) All of the electric motor and control panel are explosion proof for zone 1 and zone 2. We can also provide IEC EX and ATEX, UL certified explosion proof motor and control system for special requirement.
The decanter centrifuge can be also installed inside the 40ft container on top of the support frame, the container top can be opened for maintenance and parts replacement. The VFD decanter centrifuge is used to treat the discharged fluids from vertical cuttings dryer, to separate more fine solids from the fluids, the recycled water can be reused to prepare for new fluids. The VFD control panel can adjust the bowl speed, differential speed and pump speed to adjust the feed flow rate.
The vertical cuttings dryer is the ideal equipment to treat the oil based mud drilling waste management, the separated solids with oil content in the cuttings is below 5%, which is allowed for landfill in some countries.

Recently one unit of mud cleaning system for offshore platform is ready for shipment. Different with normal design drilling mud cleaning system for onshore drilling, the mud cleaning system for offshore is with different features, like compact design, convenient transportation, offshore lifting frame, explosion proof standard to meet offshore drilling requirement, painting and coating to meet offshore requirement for better corrosion resistance.

The technical configuration is as below:
1) One unit of linear motion shale shaker, the discharged solids are collected by buffer box and collected by screw conveyor, which can transfer the drilling waste to cuttings box. The shale shaker are installed on the mud tank with offshore standard lifting pad, it needs to be lifted to the offshore platform frequently, the safety should be assured. All the mud tank pipelines are layout outside for convenient maintenance and operation. All the valves, fittings, flanges are all oil resistance material for longer working life. The shale shaker equipped with 2 ea Italy Oil brand vibration motor, the shaker screens are produced comply with API RP13C standard, with 3 layers stainless steel material wire mesh, composite material frame for longer working life. The shaker screens fixing method is by wedges.

2) One unit of mud cleaner (desander, desilter and shale shaker 3 in 1), the desander cone and desilter cone are all made of 100% polyurethane material for longer working life. The bottom shale shaker is same model with the shale shaker, the shaker screens are with same dimension. The shaker deck bottom are made of stainless steel material for better corrosion resistance.
3) Centrifugal pump, the pump casing and impeller such wear parts are made of ductile hard alloy for longer working life, FAG brand bearing for reliable operation. We can get offshore lifting pad certificate as per client’s requirement.