Manufactured by SinoLaser Technology Co., Ltd
Ultra-finemagnetic particleremoval forstable RSS drilling
The MagBee magnetic separator is built for oil-based mud and deep shale drilling. Its custom Halbach closed magnetic circuit, high-gradient separation field and static inner magnetic system target magnetic and weakly magnetic particles in the critical 5-20μm range.
Why It Matters
Fine magnetic particles in drilling fluid directly impact RSS reliability
Harmful magnetic substances in drilling fluid mainly come from barite fines, hematite, magnetite debris and fine iron minerals in cuttings. Most particles fall in the 1-20μm range, causing wear, blockage and signal disturbance in RSS electronics, seals and bearings.
Technology
A Halbach closed circuit concentrates magnetic energy where it works
High-gradient capture
Effective gradient reaches ≥52,000 kA/m² with peaks above 80,000 kA/m², covering the 5-20μm risk window for RSS tools.
One-sided magnetic utilization
The 3D closed magnetic circuit delivers >92% one-sided magnetic utilization and reduces leakage by 70%, creating higher working-side gradients with limited magnet volume.
Stable rotating outer drum
A fixed inner magnetic system carries the custom magnet pack while a 304 stainless outer drum rotates at an adjustable 0.5-3m/min line speed for high-density mud.
Pole-shoe upgrade
Optional pole shoes raise the gradient to 120,000-150,000 kA/m² for enhanced removal of sub-5μm particles.
Working Principle
Adsorb, lift, discharge and collect in one continuous process
As drilling fluid flows through the lower mud channel, the outer drum rotates counterclockwise. Ultra-fine magnetic particles are attracted to the drum surface and carried to the top non-magnetic discharge zone. With field strength below 50Gs in the discharge area, scrapers or high-pressure water can recover the particles with less secondary adsorption.
Static inner magnet system, no eddy-current loss
Sealed IP66 structure for Zone 1 explosive environments
Adjustable speed for high-density mud conditions
Specifications
Core specifications and configurable range
| Drum size | 1200mm × 300mm effective separation width, expandable to 400mm |
|---|---|
| Capacity | 25-80 m³/h depending on solids content and mud viscosity; 50 m³/h in the cited field case |
| Maximum gradient | ≥52,000 kA/m², peak 81,000 kA/m²; pole-shoe module can exceed 120,000 kA/m² |
| Outer drum flux | 5000-5600 Gs |
| Magnet grade and temperature | N52 for ≤80-85°C; N40SH option for high-temperature environments up to 150°C |
| Drive and speed | 1.5kW VFD gearmotor; 0.5-3m/min outer drum line speed; 0.5-20rpm adjustable rotation |
| Weight | Approx. 880kg |
| Installation | Frame-mounted above the mud transition tank; adjustable drum immersion, typically 200-300mm and adaptable across 150-400mm on site |
Field Data
From lab capture rate to continuous field operation
86.4%
After installing a 50m³/h MagBee separator, removal of 8-25μm magnetic particles rose from 11% to 86.4%. RSS failure interval increased from 98h to 410h, saving about $127,000 in maintenance and spare parts per well.
72%
In high-density oil-based mud, replacing a ferrite-based separator reduced 14-30μm solids by 72% and reduced rotary steering torque fluctuation by 55%.
30天
The system ran continuously for 30 days, removing an average of 4500g of magnetic material per hour. No tripping caused by magnetic blockage of RSS tools occurred during the fourth drilling section.
70%+
Iron powder content in drilling fluid was stabilized at 100-300g/h, more than 70% lower than the traditional method, effectively slowing magnetic accumulation.
Comparison
Why effective gradient matters more than surface flux alone
Conventional separators may show surface flux above 3000Gs, yet their low gradient often captures only coarse particles above 60μm. MagBee uses a custom Halbach closed circuit to concentrate magnetic energy on the working side and create capture conditions for weakly magnetic ultra-fine particles such as 20μm hematite.
ItemConventionalMagBee
Effective gradient13,000-18,000>52,000
20μm hematite capture<15%82%-91%
Outer drum flux3200-3800 Gs5000-5600 Gs
Contact
Send mud parameters and tank dimensions for a configuration proposal
Recommended inputs: drilling fluid type, solids content, mud temperature, target flow rate, transition tank dimensions, site explosion-proof requirements, and whether high-temperature magnets or pole shoes are needed.
SinoLaser Technology Co., Ltd
Address: No.3 Chaichang Road, Wuzhong District, Suzhou
Tel: +86 512-66305799
Mobile: +86 13771994385
Email: [email protected]
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