Depamu’s High-Pressure Triplex Plunger Reciprocating Pumps (such as their heavy-duty 3HD series) are specialized, field-proven solutions for secondary oil recovery, specifically oilfield water injection and polymer flooding.
When oil reservoirs lose natural pressure, injecting water or polymers at extreme pressures forces the remaining crude toward production wells. Because oilfield produced water is frequently corrosive, abrasive, and highly pressurized, these pumps are engineered to withstand severe environments.
1. Key Technical Specifications
Depending on the exact model framework selected (e.g., the 3HD120 or 3HD160 series), Depamu's reciprocating water injection pumps deliver high industrial capacity:
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Maximum Pressure: Regularly configured from 10 MPa up to 50 MPa (~100 to 500 bar) for standard water injection, with advanced EOR (Enhanced Oil Recovery) or polymer units capable of exceeding 120 MPa.
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Flow Capacity: Modular configurations handle up to 15–20 m³/h per single unit on high-speed configurations (e.g., 60 strokes per minute), and can scale significantly higher when set up in parallel.
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Wetted Material Selection: Crucial for oilfields.
Wetted parts can be customized using 316L Stainless Steel, Dual-Phase (Duplex) Steel, Titanium, or Hastelloy to handle high salinity, produced brackish water, or high- $H_2S$ sour gas environments.
2. Design Architecture for Oilfields
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Triplex (3-Plunger) Configuration: The three-plunger design significantly reduces flow pulsation compared to simplex or duplex pumps. This protects upstream and downstream oilfield piping from fatigue and stress fractures.
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Skid-Mounted Integration: Depamu usually delivers these as turnkey injection skids.
They include the plunger pump, explosion-proof electric motor (or diesel engine drive for remote fields), pulsation dampeners, bypass valves, instrumentation, and control panels pre-piped on a single structural steel frame. -
Electric Heating Option: For specific wells where the injection medium or ambient temperatures risk fluid solidification or paraffin/crystallization blockages, Depamu provides an electric heating jacket pump head to maintain optimal fluid mobility.
3. Operational Advantages in E&P (Exploration & Production)
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High Volumetric Efficiency: Unlike standard centrifugal pumps whose performance drops drastically if wellhead backpressure rises, Depamu's positive displacement plunger pumps maintain a nearly constant flow rate regardless of pressure spikes from the reservoir.
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Robust Drive End: Features an integrated lubrication system with low friction coefficients, ensuring the pump can handle continuous 24/7 continuous duty cycles common in upstream oil and gas operations.
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German-Inspired Engineering: Depamu leverages imported German fluid technology concepts, providing tight clearance tolerances and highly resilient packing seals that minimize structural leakage at the plunger crosshead.
4. Plunger vs. Hydraulic Diaphragm for Injection
A Quick Selection Note: If your injection water contains highly abrasive sand particles or exceptionally toxic chemical compounds, Depamu also offers Hydraulic Diaphragm Pumps (3DP Series) for the same application. While plungers offer raw mechanical efficiency and high pressure, diaphragms ensure zero process fluid leakage to the environment.
Are you sizing this pump for a specific injection well pressure requirement, or evaluating Depamu as an alternative to a traditional Western manufacturer like Milton Roy, Lewa, or Sulzer?