High Temperature Long Service Life Downhole Motor

High Temperature Long Service Life Downhole Motor Principle

The physical properties of the stator rubber have been improved by using hydrogenated nitrile butadiene rubber (HNBR), which has high tensile strength and maintains high modulus and tear strength under high temperature.

Compared with ordinary nitrile rubber, HNBR has improved oil resistance, solvent resistance, and heat resistance, and can adapt to downhole environments with a temperature of ≤175°C.

At the same time, the rubber vulcanization method has been optimized to improve rubber crosslinking density.

The amount of fillers has been adjusted to increase hardness and strength; appropriate heat stabilizers have been added to enhance temperature resistance performance.

And quality plasticizers have been added to improve the rubber’s extract resistance in high temperature mud.

The optimization of various methods in the rubber formula has significantly improve the temperature and medium resistance level, performance, and lifespan of the stator rubber.

Optimizing the rubber formulas has greatly improved the temperature and impurity resistance levels, resulting in better performance and a longer service life.

Optimization for Service Life

Radial Bearings: Ceramic materials are used to increase hardness and toughness while reducing friction.

Centralizer: Wear-resistant belts are embedded in PDC composite.

Bending Shell: Wear-resistant belt of anti-cracking layer is made of wear-resistant material with hardness of HRC62.

Rotor: Special manufacturing process is adopted to prevent pinholes from occurring during chrome plating.