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| 1. Pumping Units |
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1.1 RoMotorTM Pumping Units
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The unique long stroke Pumping Units directly driven by low speed and high torque PMSM Motors( No gears, Pulleys or Sprockets). Intelligent control and cost saving. |
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1.2 LiMotorTM Pumping Units
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The unique long stroke and directly driven Pumping Units by linear motors. No gears, pulleys or sprockets. Intelligent control and cost saving. |
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| 2.
Surface Directly-Driven System for Downhole Screw Pumps
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| The downhole screw pump is directly driven by a low speed and high torque permanent magnet synchronous rotary motor system mounted on the well head. We can design to meet your well head connection requirements. |
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| 3.
Non-Contact Liquid Lubricated Mechanical Seals
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Permanent Magnet Motors
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4.1 PMSM Motors
4.1.1 High-torque and ultra high-torque Permanent Magnet Synchronous Motor (PMSM). Speed normally up to 500rpm and torque up to 60 kN.m (44,253 lbf-ft);
4.1.2 Conventional Permanent Magnet Synchronous Motor. Power up to 1,000 kW(1,341 HP), typical rated speed up to 10,000 rpm;
4.1.3 Low speed and heavy duty linear motor. Continuous thrust force up to 100 kN(22,481 lbf);
The speed of above motors can be widely adjusted and always at high efficiency working area by adopting the Variable Frequency Drive (Standard Equipment).
4.2 ASPMSM Motors
4.2.1 Asynchronous Starting Permanent Magnet Synchronous Motor (ASPMSM) based on or not NEMA standard. Power range from 3 kW (4 HP) to 250 kW (335 HP).
This kind of motor has the all advantages of PMSM Motor. But no need VFD to start.
WDDM also makes the special motor per customer's requirements.
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| 5. Chemical Products for Oilfield |
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5.1 Drilling and Completion Series
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Mosaic Membrane Drilling Fluid, Organic Salt Drilling Fluid System, Polymer Salt Inhibitor of Drilling Fluid, Spacer Fluid Aggravating, Agent of Non-Solid Well Completion Fluid, etc. |
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5.2 Cementing Series
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Our Cementing Series is suitable for temperature up to 200 ℃(392 ℉) and suitable for wide temperature difference (40 to 200 ℃ ; or 104 to 392 ℉ ) cementing job. |
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5.3 Acidizing and Fracture
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Unique Solid Acidizing Fluids including Solid Hydrochloric Acid and Solid Hydrofluoric Acid, Fracturing Fluids inclusive of Viscoelastic and Super Clear Fracturing Fluid, etc. |
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5.4 Sealing Series
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Pressure Activated Sealant, etc. |
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5.5 Gathering and Transferring Series:
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Pour Point Depressant (PPD)
Drag Reducing Agent (DRA) |
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5.6 Scale Cleaning Series
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Barium Strontium Scale Cleaner, etc. |
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5.7 Barite Blocking or Sulfate Pollution Remover
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5.8 Clay Stabilizer
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5.9 Viscosity Reducer
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/English 
