Oil Drilling Equipment Mud Pump HNBR 70 Rubber Piston Seal

Linde Polymer Tec Co.,Ltd. is one of the most experienced manufacturers and suppliers of oil drilling equipment mud pump hnbr 70 rubber piston seal in China, also supports customized service. Please feel free to buy high quality oil drilling equipment mud pump hnbr 70 rubber piston seal for sale here from our factory.

Oil drilling equipment mud pump HNBR 70 rubber piston seal

The piston seal of the mud pump of oil drilling equipment is a key component of the mud pump. Its main function is to effectively prevent the leakage of mud between the piston and the cylinder liner during the operation of the mud pump, and ensure that the mud can circulate at high pressure in the pump according to the design requirements, thereby providing stable and reliable power transmission for drilling operations.

Oil drilling equipment mud pump HNBR 70 rubber piston seal

Hydrogenated Nitrile Rubber (HNBR)

High temperature resistance (up to 150℃ - 180℃ )

Enhanced chemical corrosion resistance; resistant to corrosive components such as sulfur and chlorine;

Advantage Oil drilling equipment mud pump HNBR 70 rubber piston seal

Excellent sealing performance: HNBR 70 rubber piston seal can effectively prevent mud leakage between the piston and the cylinder liner, ensure the normal operation of the high-pressure circulation system of the mud pump, provide stable power transmission for drilling operations, and improve drilling efficiency.

Good dimensional stability: The seal can maintain good dimensional stability under complex working conditions such as high temperature and high pressure, and is not prone to deformation, shrinkage and other problems, thereby always maintaining a good sealing effect and reducing the risk of leakage caused by changes in seal size.

Strong anti-extrusion performance: Due to the high strength and hardness of HNBR material, the piston seal has strong anti-extrusion performance under the action of high-pressure mud, and can firmly maintain the sealing position between the piston and the cylinder liner to prevent the seal from being extruded and destroying the sealing effect.

Good compatibility: It has good compatibility with metal materials and lubricants commonly used in oil drilling equipment, and will not cause chemical reactions or mutual corrosion, ensuring the stability and reliability of the entire equipment system.

Long service life: Taking into account its excellent oil resistance, wear resistance, chemical corrosion resistance, high temperature resistance and other properties, the service life of HNBR 70 rubber piston seal is relatively long, which can reduce the maintenance cost and downtime of equipment and improve the economic benefits of oil drilling operations.

Processing Technology

Molding process: Advanced injection molding or compression molding process is usually used to process the strictly formulated and mixed HNBR rubber material into the initial shape of the piston seal. During the molding process, the temperature, pressure, time and other parameters are precisely controlled to ensure that the internal structure of the seal is uniform and dense, without defects such as bubbles and cracks, providing a good foundation for subsequent processing and use.

Turning: The blank after forming needs to be turned precisely to achieve the final dimensional accuracy and surface quality requirements. By using high-precision CNC turning equipment and advanced tools, the outer diameter, inner diameter, thickness and other dimensions of the seal are precisely processed to achieve the best clearance between the piston and the cylinder liner, thereby achieving a better sealing effect. Turning can also greatly improve the surface finish of the seal, reduce friction resistance and wear, and further improve the sealing performance.

(I) Lip seal structure

One-way seal; self-tightening seal;

One-way seal advantage: The lip seal structure is usually used for one-way seals of piston seals. Its lip design can fit tightly against the inner wall of the cylinder sleeve under pressure, effectively preventing mud from leaking from the high-pressure side to the low-pressure side. When the mud pump is working, the piston moves forward, and the mud forms high pressure behind the piston. The lip of the lip seal will be squeezed against the inner wall of the cylinder sleeve by the pressure, forming a reliable seal. This structure can ensure that the mud flows in the designed direction and improve the working efficiency of the mud pump. For example, in the discharge stroke of the mud pump, the lip piston seal can effectively prevent the mud from flowing back and ensure that the mud is discharged smoothly from the pump body.

Self-tightening sealing effect: This structure has the characteristics of self-tightening sealing. As the mud pressure increases, the contact pressure between the lip and the inner wall of the cylinder sleeve will also increase accordingly, thereby enhancing the sealing effect. This allows the lip seal to play a good sealing role in mud pumps of different pressure levels and adapt to various working conditions from low pressure to high pressure. For example, at the initial start-up of the mud pump, when the pressure is low, the lip seal can seal normally; as the pump runs, the pressure gradually increases, and the sealing effect will automatically increase, ensuring that no leakage will occur under high pressure conditions.

(II) Multi-pass sealing design

Adapt to complex working conditions: During oil drilling, mud pumps may face various complex working conditions, such as pressure fluctuations, changes in mud composition, temperature changes, etc. The multi-pass seal design can better adapt to these complex working conditions and improve the stability and adaptability of the piston seal. For example, in the case of large pressure fluctuations, the multi-pass seals can compensate each other to ensure that a good sealing effect can be maintained under different pressures; when the mud composition changes and its corrosiveness increases, the multi-pass seal can extend the failure time of the overall seal, providing a guarantee for the stable operation of the mud pump.

4. Sealing principle

The piston seal of the mud pump of oil drilling equipment is mainly based on the contact sealing principle. When the piston reciprocates in the cylinder sleeve, the seal is in close contact with the inner wall of the cylinder sleeve, and the small gap between the two is filled by the elastic deformation of the seal, preventing the mud from leaking through these gaps. Whether it is a lip seal or other sealing structure, the seal is achieved by the contact pressure between the seal and the cylinder sleeve. Under the action of pressure, the sealing surface of the seal and the inner wall of the cylinder sleeve form a barrier to prevent the flow of mud. For example, the lip of the nitrile rubber lip seal is tightly pressed against the inner wall of the cylinder sleeve under the action of mud pressure, and the solid particles and liquid molecules in the mud cannot break through this sealing contact area, thus achieving a sealing effect.

Pressure balance seal: In some high-pressure mud pumps, the seal also needs to achieve good sealing through pressure balance. The piston seal is usually designed with a pressure balance channel or structure so that the pressure on both sides of the seal can be balanced to a certain extent. This can prevent excessive wear or damage to the seal due to excessive pressure difference, and also help to improve the stability and reliability of the seal. For example, in the piston seal of some high-pressure mud pumps, a special pressure balance ring structure is used. When the mud pressure increases, the pressure balance ring can automatically adjust the pressure inside the seal to keep it relatively balanced with the external pressure, reduce the pressure difference on the seal, thereby extending the service life of the seal and ensuring the sealing effect.

5. Performance parameters

Applications

Onshore oil drilling; Offshore oil drilling;

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