Method and system for injection of viscous unweighted, low-weighted, or solids contaminated fluids downhole during oilfield injection process

A method of injecting a fluid downhole, the method comprising:

• diverting a fluid along a common flow path to one of a centrifugal pump and a plunger pump, the plunger pump disposed in the common flow path parallel to the centrifugal pump, wherein the fluid comprises one of a first solids fluid having less than 5 percent undissolved solids and a second solids fluid having greater than 5 perfect undissolved solids;
• pumping the fluid through one of the centrifugal pump and the plunger pump, the pumping comprising increasing the pressure of the fluid to an injection pressure greater than a well pressure, wherein the first solids fluid is diverted and pumped through the centrifugal pump and the second solids fluid is diverted and pumped through the plunger pump;
• and
• injecting the pressurized fluid into a wellbore.