Selection of oilfield water injection pumps

There are two types of high-pressure pumps commonly used in oil fields, namely centrifugal pumps and plunger pumps. In terms of pressure, a single-stage centrifugal pump cannot meet the requirements of this design, but it can be achieved through multi-stage combinations. A plunger pump can meet this requirement, but in terms of flow rate, a plunger pump can only meet the design requirements through a combination of multiple cylinders, while a centrifugal pump can use a single impeller flow rate.

From a structural perspective, centrifugal pumps have advantages such as small volume and light weight, even when using multi-stage combinations. Plunger pumps, on the other hand, have a large volume and high weight. In terms of performance, centrifugal pumps can use the currently popular mechanical seals, so their leakage is small and their efficiency is high. The plunger pump has serious leakage, especially under high pressure, and its transmission mechanism has unstable performance under high pressure.

From the perspective of medium analysis, if the medium being transported is clean water, it is more suitable for both types of pumps, but its leakage is greater compared to plunger pumps. Of course, if transporting media with high viscosity or impurities (such as mud), mud plunger pumps are still commonly used in oil fields.