How pump washout and pump pressure cause mud pump failures

As the pump pressure rises, the contact pressure between the piston bowl and the cylinder liner increases, the friction is also followed by a large amount of heat, which will accelerate the abrasion, aging and hydrolysis of rubber materials.

Cause material performance and wear resistance decline, modulus of elasticity and tensile strength will be reduced with the temperature rise, over a certain temperature, wear resistance drops sharply, and lose elasticity, the piston loss of sealing ability and failure.

After the increase of pumping stroke, piston speed, inertia force increases, the piston is subjected to the alternating load not only the number of times increased, while the alternating frequency becomes larger.

In such a case, the increase in pump pressure and pumping stroke will greatly reduce the service life of the piston.

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