How to Select Injection Pumps for High Pressure Oilfields

1. Technical Parameters

Flow rate and pressure are the primary technical indicators for selecting injection pumps, determining whether the pump can meet oilfield development process requirements. Flow rate must be determined based on the oilfield water injection plan, considering either the daily injection volume or instantaneous injection rate. In high pressure oilfields, daily injection volumes per well vary significantly. Pressure parameters are even more critical, as injection pressure must overcome multiple resistances. Pressure stability affects the water injection spread coefficient, and plunger pump demonstrate distinct advantages under high pressure operating conditions.

3. Pump Type Selection

Reciprocating pump (especially triplex or quintuplex models) utilize the reciprocating motion of plunger to draw in and discharge fluids, capable of generating extremely high effective head. While these pumps have relatively low displacement, they offer a wide adjustment range and high overall efficiency, making them particularly suitable for conveying low-flow, high-pressure, or even highly viscous liquids.

Diaphragm pump convey fluids through the reciprocating deformation of a diaphragm, making them suitable for transporting liquids containing solid particles, highly corrosive substances, or toxic/hazardous chemical displacement agents. In high pressure oilfield polymer injection and chemical displacement applications, they protect the molecular chain structure of polymer solutions, ensuring efficient oil displacement.