Month: December 2022

Shale shaker is as the first phase cleaning equipments of drilling rig solids control system, hydrocyclones separation as the second phase cleaning and third phase cleaning equipments of solids control system. Hydrocyclones including 10” desander cone is used to separate solids in the range of 40 microns to 74 microns; 4” desilter cone is used to separate solids in the range of 15 microns to 44 microns. The drop in apex is installed in the taper hole of the pressure nut. The pressing nut can be rotated clockwise to compress the drop in apex to reduce the opening of the drop in apex. Rotate the pressure nut counterclockwise to reduce the pressure on the drop in apex, and restored to its original size. The spray mode can be adjusted by the opening size of the drop in apex during operation.

The hydrocyclones working principal is as below:
The drilling fluids is feed to desander/ desilter cone inlet port by centrifugal pump, causing a whirlpool effect to occur inside the cone, the slurry drives the larger, denser particles outward against the cone wall while the smaller, lighter particles move toward the center of the cone. The low-pressure vortex at the center of the cone drawing in air through the apex at the lower discharge end of the cone. The high-velocity air stream aids the upward flow of liquid and small particles toward the cone’s upper discharge, while the spiraling stream of liquid and larger particles flows downward along the cone wall toward the lower discharge.

The recommend desander and desilter operating pressure varies from different mud weight and specific gravity. The desander cone and desilter cone is made of 100% polyurethane for better abrasion resistance. According to actual requirement, the user can select different quantities of desander cone and desilter cone, the hydrocyclone frame is standard which will installed on top of mud cleaner.

Besides for oil and gas drilling industry, shale shaker has been widely used for HDD & engineering application, such as HDD, water well drilling, bored pile, micro tunneling, TBM slurry treatment plant.

Micro Tunneling engineering is a type of big hole horizontal drilling, pipe laying while drilling. This is most typical for laying or replacing water pipes under urban buildings and traffic arteries. Firstly dig out the big vertical wellbore, and install the drilling equipment at a certain depth. The location of the open caisson is slightly lower than the equipment level, forming a sedimentation mud pit, which is conducive to the removal of solid phase. The submersible slurry pump feed the slurry to the mud cleaning unit, which consists of a shale shaker, a mud cleaner, a feeding pump and a small mud storage tank.

The HDD and micro tunneling application including river crossing for pipeline laying in the river bottom, road crossing for pipeline laying, fiber optic cable laying. When laying big size pipeline, a reliable solids control system is required, which consist of the high treating capacity shale shaker, desander, desilter, decanter centrifuge, mud tank, etc. when the engineering site is located in residential and commercial areas, the drilled hole size should be as small as possible, the generated drilling fluids and cuttings should be collected by waste box, the required solids removal unit will consist of a small tank, a feed pump and a small shale shaker.
The shale shaker used for trenchless and engineering projects is normally 2 panel shale shaker and 3 panel shale shaker, the model number is GNZS752 and GNZS703. The composite material frame shaker screen is installed on the shale shaker for longer working life.
If you need a mud cleaning/ recycling system for HDD & micro tunneling project, pls contact with GN solids control.

Recently one batch of solids control equipments are ready for shipment to drilling company, including desander GNZJ752J-1S, desilter GNZJ752J-8N and vacuum degasser GNZCQ270B .

The bottom shale shaker of desander and desilter is a 2 panel shaker, installed 2 pcs of composite material frame shaker screen, which is drived by 2 ea of 1.0 KW vibration motor and produce G force up to 7.5G. The updated J version shale shaker with features as below:

1. Aluminum alloy explosion proof control cabinet with the protection grade of IP56 or above, which is certified by CNEX/ATEX/IECEX explosion proof standard.
2. Ratchet Wrench for quick disassemble and assemble
3. 2ea of Italy Oli or US Martin brand vibration motor produce G force up to 7.5G
4. Mechanical shaker deck angle adjustment device, the angle can be adjusted synchronously from both side while operation.
5. Patent design wear resistant polyurethane rubber strip with good sealing effect and longer working life.
6. Bottom discharge and side discharge for option
7. With different qty of desander cone and desilter cone for different treating capacity requirement
8. Composite material frame shaker screen to produce comply with API RP13C standard.
   Horizontal vacuum degasser GNZCQ270B is used to remove gas from gas cut mud, to ensure proper drilling mud weight, the vacuum degasser is a self contained type degasser, and it can be also acted as a big agitator of the drilling fluids, to protect the desander and desilter feeding pump. The treating capacity is 270m3/h, with horizontal vessel tank diameter 920mm.
9. 
   Besides for desander, desilter, vacuum degasser, GN also produce shale shaker, mud cleaner, high G drying shaker, decanter centrifuge, mud agitator, mud gun, mixing hopper, centrifugal pump, screw conveyor, vertical cuttings dryer, mud tank system , vacuum pump, chemical dosing unit, screw pump, submersible slurry pump, etc.

As one of the high speed decanter centrifuge manufacturer in China, GN solids control can produce different types, different size and different treating capacity centrifuges machine, by centrifuge sizes, we have 9 inch bowl centrifuge, 14 inch bowl centrifuge, 18 inch bowl centrifuge, 22 inch bowl centrifuge, 30 inch bowl centrifuge, the centrifuge bowl length diameter ratio available is 2, 3 or 4 series, so each centrifuge bowl with different bowl length for widely used. By centrifuge applications, we have centrifuge for T series dewatering type, Y series separation type and C series clarifying type centrifuges. The applications of GN centrifuges, including drilling fluids cleaning, drilling waste treatment, oil sludge treatment, industrial waste slurry treatment, construction mud cleaning, etc. By driving methods, we have VFD control decanter centrifuge and full hydraulic drive decanter centrifuge. Besides, we also produced 2 phase separation, 3 phase separation centrifuge; and horizontal centrifuge, vertical centrifuge ( 3 phase or 2 phase disc separator). For your different treating capacity and treatment requirement, we will offer different model centrifuge.

As a manufacturer of high speed decanter centrifuge, we have specific standard for its performance requirement in manufacturing as per industry standard.

1. The centrifuge shall be free of collision and abnormal sound when it is started to the rated speed
2. The starting time and maximum starting current when the centrifuge starts to the rated speed shall meet the design requirements.
3. The bowl speed shall not be less than 97% of the rated speed
4. Under unloading condition, the vibration speed of low speed centrifuge shall not be higher than 4.5mm/s, and that of high speed centrifuge shall not be higher than 7.1mm/s
5. Under unloading condition, the temperature of main bearing shall not exceed 70 ℃, and the temperature rise shall not exceed 35 ℃.

Recently 4 sets of Australia Standard Mud Cleaning Unit are ready for shipment to Australia.
The features of GN mud cleaning unit are as below:

The model is GNMS-200D, treating capacity is 200gpm, 4 sets

The mud cleaning unit consists of GNZY753E-Y4NF mud cleaner (including double deck shale shaker GNZS753, with 4ea of 4 inch desilter cone, feeding pump, mud tank, electric control system)

The standard of walkway, guardrail, electric motor, electric control system meets Australia safety standard
The working process of mud recycling system is that the pit pump( submersible slurry pump) collect the used drilling mud from mud pit and transfer to mud cleaning unit, the bottom shaker screen for coarse solids separation, the fluids drop into the mud tank, the desilter feeding pump feed the mud to 4 inch desilter cone for cut point 20 microns fine solids separation, the clean mud flow to another mud storage tank, which with mud mixing hopper and mixing pump, to mix with chemical additive to prepare for new drilling fluids and reused it for drilling. If the user need to separation cut point 5 microns, decanter centrifuge will be used and installed on the mixing tank.

The mud cleaning unit is a customized solution of mud recycling, we also have self contained mud recycling system for higher treating capacity and better separation performance It can be widely used for trenchless HDD project, CBM drilling, geothermal well drilling, Tunnel boring machine or bored pile project, water well drilling, diamond core drilling, etc. We have standard model GNMS-200B with capacity 200gpm, GNMS-400B with capacity 400gpm, GNMS-600B with capacity 600gpm, GNMS-800B with capacity 800gpm, the other models can be customized as required.
If you need a treatment solution of construction mud and HDD drilling mud, pls contact with GN solids control.

Recently GN produced double deck linear motion shale shaker are ready for shipment to Europe client.
The features of GNZS706 double deck linear motion shale shaker is as below:

1. The GNZS706 double deck linear motion shale shaker, top layer with 3pcs screen, total screen area is 2.0m2, the bottom layer with 3pcs screens, total screen area is 2.6m2. Total screen area is 4.6m2.
2. Working principal is that top layer screen is to separate coarse solids from the drilling fluids, the bottom layer screen is to separate the fine solids , the double deck shale shaker will increase the treating capacity and reduce the shaker screen damage.
3. The double deck shale shaker is to replace the old VSM300 shale shaker which installed on client’s drilling mud solids control system.
4. The double deck shale shaker equipped with mechanical fast lock wedges to assemble and disassemble the screens, for easy replacement of shaker screens and reliable operation. A ratchet wrench is used for screen pressing, if the ratchet wrench failed, the traditional hammer can be used to fix the screen.
5. With large screening area, linear motion vibration mode and high G force, it can meet both onshore drilling and offshore drilling fluids trearment requirement.
6. Mechanical shaker deck angle adjustment synchronously while operation is applied.
7. Wear resistant olyurethane rubber strip with good sealing effect and longer working life.
8. we can provide bottom fluids outlet and side fluids outlet for option depends on their requirements.
   Except for double deck shale shaker, GN also produce single deck shale shaker, including 2 panel shale shaker, 3 panel shale shaker, 4 panel shale shaker, 5 panel shale shaker, for different treating capacity and mud cleaner with desander cone & desilter cone. Pls contact with GN solids control for more information.

Depends on the density and viscosity of the fluids to be treated, to make the solids liquids separation easily, for the fluids which is difficult to separate, normally we need to enlarge the solids particle size, reduce fluids viscosity and increase solids liquids density difference by methods of mechanical and chemical ways. Besides, we can also apply to increase concentration, preconcentration and wear resistant accordingly to improve the centrifuge treating capability and reduce the abrasion to the centrifuge screw.
The solution to enlarge the suspended particles by mechanical or chemical methods including:

1. Inorganic electrolyte is added to the suspension fluids as a coagulant to agglomerate small particles into large particles.
2. Mixing with flocculants or coagulants, the order of adding various flocculants, and the intensity and time of mixing have an impact on the flocculation effect. Therefore, the type and dosage of flocculants need to be determined by the mixing test. The requirement of Flocculation treatment effect is that the settling speed of flocculated fluids is fast, and the clarity of top layer clear liquid is good.
3. Change the viscosity and density of the fluids by adjusting temperature
   Especially for the oil sludge treatment by decanter centrifuge, heating the oil sludge and mixing with proper chemicals to reduce the viscosity will increase the solids liquid separation efficiency.
   A dewatering centrifuge package including one unit of dewatering centrifuge, centrifuge feeding pump, fluids catching tank with pipelines and tank accessories, chemical dosing unit.
   GN dewatering centrifuges can be used for treatment of oil sludge, drilling mud, construction slurry, industrial waste water and other kinds of solids liquid separation. The centrifuge models including 14 inch bowl centrifuge, 18 inch bowl centrifuge, 22 inch bowl centrifuge and 30 inch bowl centrifuge. If you need a dewatering centrifuge package, pls contact with GN solids control.