Dosage Pumps
A dosage pump — also called a chemical injection pump or metering pump — delivers precise, controlled volumes of chemical into a production stream or pipeline at a set rate. Accurate chemical dosing is essential for corrosion inhibition, scale prevention, hydrate suppression, and other production chemistry programmes.
Proxima supplies Arrow Engine dosage pumps through Power Flow International Sales for oil and gas production applications in Azerbaijan.
What Dosage Pumps Do
Dosage pumps meter chemical from a storage tank into the production stream at a controlled flow rate — typically expressed in litres per day or millilitres per stroke. The pump rate is set to maintain a target chemical concentration in the produced fluid, regardless of variations in production rate or pressure.
Reliable dosing depends on pump accuracy, resistance to the chemicals being injected, and the ability to maintain set rate under backpressure.
Chemical Injection Applications
- Corrosion inhibitor injection into flowlines and tubing
- Scale inhibitor injection at the wellhead or downhole
- Methanol injection for hydrate prevention in gas wells and flowlines
- Biocide dosing for produced water treatment
- Demulsifier injection at separators
- H₂S scavenger injection
Product Range — Arrow Engine Dosage Pumps
Arrow Engine Company manufactures dosage pumps designed for continuous-duty oilfield service. Arrow dosage pumps are positive-displacement plunger pumps driven by a gearbox and motor, delivering accurate metered flow against high backpressure.
Key features:
- Adjustable stroke rate and stroke length for flexible dosing control
- High-pressure capability for downhole injection applications
- Wetted parts available in stainless steel and other corrosion-resistant materials
- Designed for unattended remote wellsite operation
- Compatible with a wide range of chemical formulations
Key Specifications
| Parameter | Details |
|---|---|
| — | — |
| Pump type | Positive-displacement plunger |
| Flow range | Adjustable — contact Proxima for model-specific data |
| Maximum pressure | Up to 5 000 psi (model-dependent) |
| Drive | Electric motor or engine drive |
| Wetted materials | Stainless steel, Hastelloy, PTFE options |
| Chemical compatibility | Wide range — specify chemical on order |
Why Source Through Proxima
Proxima and Power Flow assist with dosage pump selection based on your injection rate, chemical type, injection pressure, and power supply. We supply pumps with appropriate wetted materials for the specific chemical being injected, reducing compatibility failures in the field.
Frequently Asked Questions
Q: How do I size a dosage pump for my application?
Sizing requires the target injection rate (litres per day), injection point pressure, and chemical viscosity. Proxima will specify the correct pump model and stroke setting for your conditions.
Q: Can Arrow dosage pumps inject downhole?
Yes. High-pressure models are suitable for downhole injection applications where injection pressure exceeds wellhead pressure. Specify injection depth and reservoir pressure when ordering.
Q: Are the wetted parts compatible with methanol?
Arrow dosage pumps are available with methanol-compatible wetted parts. Specify the chemical being injected when requesting a quote so we can confirm material compatibility.
Q: Can the pump run unattended at a remote wellsite?
Yes. Arrow dosage pumps are designed for unattended continuous operation. Electric motor drive requires a power supply; engine drive or solar-powered options are available for remote sites without grid power.
