Month: February 2022

As a professional solids control equipments manufacturer in China, GN solids control can produce both linear motion shale shaker and balanced elliptical motion shale shaker, the working principal of linear motion is as below:

Two counter rotating vibration motors rotate in opposite directions, the force generated on the shaker deck is zero, which results the linear motion. G force sticker can be put on the shaker deck to test the acceleration, and the user can calculate the G force according to the formula.
GN Dual Motion shale shaker with 2 vibration motors to achieve linear motion and progressive elliptical motion, the operation process is as below: One vibration motor is normal design, the other set vibration motor is Swing weight motor, it produces different G force when forward and reverse ( there are arrow to show the rotary direction on the vibration motor). When forward, the produced vibration G force is matched with the other set vibration motor G force to produce linear motion; when reverse, the produced G force is smaller than the other set vibration motor G force, the joint force generated by the G force of 2 vibration motors, the formed torque to Centroid is mutative, Simultaneously the progressive elliptical motion is generated under the action of the shaker deck gravity.
GN produced linear motion shale shaker, elliptical motion shale shaker, dual motion shale shaker have been used to treat different types drilling fluids. Linear motion shale shaker can be mostly used for water based drilling fluids, Non-Aqueous Drilling Fluid.
The shale shaker can be made to tandem shale shaker, triple shale shaker for convenient operation and transportation. We can also produce dual deck shale shaker for special requirement.
If you need linear motion shale shaker and dual motion shale shaker, pls contact with GN solids control.

Recently 3 sets of 1500gpm drilling mud cleaner are ready for shipment to drilling company in China, the model is GNZJ594F-3S16NF.
The technical configuration is as below:

The linear motion shale shaker with treating capacity 360m3/h, with 3 sets of 10 inch desander cone, 16 ea of 4 inch desilter cone, all the hydrocyclones are made of 100% polyurethane material for better wear resistance, the bottom shale shaker installed 4 panel composite frame shaker screen, all the shaker screens are tested by independent third party USA company according to API RP 13C. The shaker screen dimension is 585 x 1165mm, features of GN shaker screens including four side tension of mesh during heat press, composite material frame screen to increase the usable area, and repairable to save cost, longer time storage up to 5 years, high performance wire mesh configuration is compliant to API RP13C with longer screen life. The total screen area is 2.73m2, the deck angle adjustment range is -1 ~ +5°, the adjust G force is up to 7.5G which is provided by 2 ea vibration motor. The vibration motor is made from Italy Oli, Itavibras or US Martin, to be certified by CNEX, IEC EX, ATEX or UL.
The mud cleaner can be made as desander without bottom shaker, desilter without bottom shaker, desander mud cleaner ( desander with bottom shaker), desilter mud cleaner( desilter with bottom shaker) and 3 in 1 mud cleaner.

The mud cleaner is installed after linear motion shale shaker, or after vacuum degasser, the desander cone separation cut point is 45 microns, the desilter cone separation cut point is 20 microns, if the client need to separate more fine solids, middle speed decanter centrifuge will be used for barite recovery, the high speed decanter centrifuge will be used for low gravity solids separation.

Recently one batch of drilling fluids shale shaker and mud tank are shipped for offshore drilling companies. This is repeat order from our client.

The shale shaker used for offshore drilling companies are with ATEX explosion proof (or comply with marine used motor and control panel) vibration motor and control panel. The coating and painting is PPG Protective & Marine Coatings, 3 layers, 1st layer is Zinc rich Heavy Duty epoxy primer, 2nd layer is Epoxy micaceous iron oxide intermediate, 3rd layer is polyurethane topcoat finishing. The shaker screen used is composite material frame pre-tensioned shaker screens for longer working life. The shaker deck angle can be adjusted by ratchet wrench from -1° to +5°. The screw lifting device can be adjusted at the same time from both sides.

The mud tanks for offshore drilling consists of skid mounted centrifugal pump with lifting frame, mud tank with mixing hopper, pipelines, lightings, guardrails, walkway, stair, etc. The shale shaker will be installed on top of mud tank. All the mud tank and other modular is installed with lifting pad or lifting frame for convenient movement.

Except for shale shaker and mud tank, GN solids control also produce mud cleaner, desander, desilter, vacuum degasser, centrifugal pump, mud agitator, mud gun, mixing hopper, shaker screen, decanter centrifuge, mud gas separator, vertical cuttings dryer, screw conveyor, etc, which can be used for both onshore and offshore drilling with different standard.
Mud cleaner is a combination of desander cone, desilter cone and bottom shaker, the desander cone and desilter cone are all made of 100% polyurethane material for better wear resistant, by using different qty hydrocyclones, we can provide different treating capacity mud cleaner. The bottom shale shaker model can be used as back up shale shaker when it is required. if you need more information of offshore drilling shale shakers, pls contact with GN.

TBM Pipe Jacking engineering are widely used in urban construction, normally it will face a problem of working area limit, working noise limit and environmental protection limit. GN TBM Slurry Separation Plant is designed to meet all of the requirements mentioned, the features of GN TBM slurry separation plant including compact design, high treating efficiency, better treatment result, different treating capacity, easy movement, convenient disassembly for different requirement.
Except for small desander unit of TBM slurry separation plant–GNMS-500D & GNMS-1000D, we also have below models of middle TBM slurry separation plant and large TBM slurry separation plant:

Take GNTBM-240 (240m3/h) for example, it consists of 1 unit of desander mud cleaner with double deck bottom shaker and 2 ea desander cone, 1 unit of desilter mud cleaner with double deck bottom shaker and 12ea desilter cone, 2 units of desander desilter feeding pump, mud tank with lifting frame for convenient transportation. During transportation, the top layer desilter mud cleaner will be disassembly to meet the road transportation height limit. The whole system without disassembly can be shipped by bulk cargo vessel. The complete system are controlled together, it is installed on the position where is convenient for operation. Both of the desander cleaner and desilter cleaner discharge the separated solids from one end of the TBM slurry separation plant. The total screen area is 5.33m2.
The working process is as below:
The TBM slurry is fed to desander cleaner and desilter cleaner scalping screen to separate coarse solids, the slurry dropped into the fluids catching tank, the desander feeding pump transfer the slurry to desander cone to separate sand/silt, the solids dropped on the fine shaker screen to make it drier. The fluids flow to catching tank and the desilter feeding pump transfer the fluids to desilter cone, the solids on the top fine screen to dewater the solids.

The used water based mud normally will use chemical enhanced centrifugation to enhance the treat and disposal. The additives will be mixed with the used mud, so the solids accumulated as bigger size and be easily treated by decanter centrifuge.

A dewatering unit normally including: a mixing tank with mud agitator, the chemical dosing system installed on the mixing tank skid, the decanter centrifuge installed on top of mixing tank, the decanter centrifuge feed pump installed on the mixing tank skid. If required, we can install the dewatering centrifuge unit inside a standard container for water proof and sun proof. The flocculants and coagulates will be added to enhance the remove of fine solids in the used mud.
The decanter centrifuge should be drived by VFD control panel, for example, GNLW363D-VFD decanter centrifuge, the max speed is 3900rpm, the normal operated speed is 3200rpm, according to the mud density and solids size, the user can adjust the frequency to adjust the G force to separate different solids. The VFD control panel is positive pressurized VFD control panel, the main motor, back drive motor and pump motor are from world famous brand drive, to adjust the frequency from touch screen.
The chemical dosing unit including chemical mixing tank with agitator, screw conveyor to transfer the chemical powder to chemical mixing tank, 2 chemical dosing pump( one in use and one as back up), hopper, pipelines, valves, control panel, etc.
The advantages of WBM dewatering unit:

1. Continuous working, if required, it can work continuously 24 hours, when decanter centrifuge is stopped, do flushing and maintenance regularly.
2. Reduce environmental impact, the treated water can be disposal and reused to prepare for new drilling fluids.
3. The discharged solids are dry enough to be collected by trucks.
   To get more details of dewatering unit, pls contact with GN solids control.