TC (tungsten carbide) bearing is an important part of radial straightening of downhole power drilling tools, especially during directional operation when the bearing is in the harsh working conditions of low speed, heavy load and drilling fluid lubrication. During the operation of downhole hydrodynamic drilling tools, the service life of the stator and rotor of turbo drilling tools is longer than that of screw drilling tools, which puts forward more stringent life requirements for TC bearings.
With the characteristics of wear resistance, corrosion resistance, heat resistance and high impact resistance, it is suitable for high-temperature drilling conditions above 200 centigrade and different drilling fluid systems
Adopting the technology of oxy-acetylene spray welding to avoid crack or fall, our TC bearing is quite different from traditional one which is processed through ordinary sintering technology. Its life span is above 400 hours, which is twice longer than that of traditional TC bearing
Abrasive particles, high temperatures, corrosive chemicals, and high loads can all contribute to a failure in rotating equipment.
PDC bearings improve overall bearing reliability in harsh conditions while eliminating the need for seals.
PDC is not a diamond coating, but instead it is a thick, manmade diamond surface that is ideally suited for operation in process fluids
where abrasive particles, like sand, can cause accelerated wear and failure with traditional bearing materials.
The Advantages of PDC:
High thermal conductivity: The PDC material reduces the local limit temperatures that lead to bearing degradation and prevents damage to the bearing material caused by the high heat .
High load: They can operate effectively over a wide range of speeds and loads. For example, in some oil and gas drilling, diamond bearings can operate at loads of up to 60,000 pounds at 100-6,000 rpm.
Wear-resistance and high temperature resistance: The PDC material has an extremely low coefficient of friction (coefficient of friction between 0.01 and 0.03). It can operate at high temperatures (up to 233℃).
High fracture toughness: Bearing materials with excellent fracture toughness reduce the likelihood of damage caused by shock loads.
High corrosion resistance: They can be unaffected by corrosive substances in the application environment.
Simplicity: There is no need for specialized lubrication during use, simplifying equipment and components by eliminating the need for seals and separate lubrication systems.
Long life: The service life is more than 6 times longer than that of tungsten carbide bearings.
Because of its extreme hardness, PDC is ideally suited to resist wear from abrasive particles inlubricants and process fluids.
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