As the core component of the oil pump, the oilfield sucker rod pump plunger drives the crude oil in the well to lift up and down through a reciprocating motion. The precision-machined metal components of the oilfield sucker rod pump plunger form a close fit with the pump barrel, and the oil inlet and outlet valves are alternately opened and closed during the movement, forming a pressure difference to continuously transport crude oil to the ground. The oilfield sucker rod pump plunger has been specially hardened and equipped with sealing elements, which can reduce liquid leakage and withstand long-term friction.
| Item | Specification |
| Product Name | Spray Metal Plunger for Rod Pump |
| Standard | API 11AX |
| Base Material | Alloy Steel / Carbon Steel (AISI 1045 or equivalent) |
| Coating Type | Nickel-based Alloy Spray Welding |
| Coating Method | Oxy-Acetylene Thermal Spray & Fusion Bonding |
| Bond Strength | 200–300 MPa |
| Coating Thickness | 0.203 mm – 1.5 mm (customizable) |
| Hardness | HRC 58–65 (depends on alloy type) |
| Surface Roughness | Ra 0.2 – 0.8 μm |
| Operating Temperature | ≤ 650°C (coating layer resistance) |
| Diameter Range | φ28 – φ95 mm |
| Length Range | 0.3 m – 1.5 m (customizable) |
| Application | Sucker Rod Pump / Oil Well Downhole Pump |
| Matching Part | Pump Barrel (Precision Honed Barrel) |
Metallurgical bonding between the coating layer and the base material ensures high adhesion strength (200–300 MPa).
Nickel-based alloy provides excellent wear resistance and corrosion resistance.
Stable performance under high temperature conditions up to 650°C.
Improved sealing performance with precision-honed pump barrel.
Reduced the friction coefficient between the plunger and the barrel
An extended pump inspection cycle and reduced maintenance cost
Custom coating thickness based on well conditions.
This sprayed metal plunger is suitable for the following oil well operating conditions:
High sand-content wells
Corrosive oil wells
High-temperature wells
Heavy oil production wells
Deep wells with high-pressure conditions
High water cut wells
Enhancing the performance of the surface wear-resistant layer, it extends the service life of the plunger-pump barrel interface and reduces the frequency of pump maintenance.
Raw material selection (high-strength alloy steel).
CNC precision machining of the plunger body.
Surface roughening & activation treatment.
Oxy-acetylene spray welding with nickel-based alloy powder.
Thermal fusion treatment (formation of metallurgical bond layer).
Precision grinding & sizing.
Hardness & coating thickness inspection.
Dimensional accuracy inspection.
Final assembly & anti-rust packaging.
Hardness testing (HRC measurement).
Coating thickness testing.
Dimensional tolerance inspection.
Surface roughness testing (Ra value).
Bond strength verification.
API 11AX compliance check.
Visual inspection for coating uniformity.
1. What is a spray metal plunger?
A spray metal plunger is a rod pump component coated with nickel-based alloy using thermal spray welding to improve wear and corrosion resistance.
2. What is the advantage of spray metal coating?
It significantly improves hardness, wear resistance, and extends service life under abrasive and corrosive well conditions.
3. Can this plunger be customized?
Yes, diameter, length, and coating thickness can be customized according to well conditions.
4. Is it suitable for sandy wells?
Yes, it is specifically designed for high sand-content and abrasive environments.
5. What standard does it follow?
It is manufactured according to API 11AX standard.
6. What is the delivery time?
Depends on order quantity, usually 2–8 weeks for standard or custom orders.
Factory area: 20,000+ m².
Employees: 96 total staff.
Engineers & technicians: 20+.
Registered capital: 56 million RMB.
Annual production capacity: 20,000+ oil pumps and specialty pumps.
Certification: API 11AX, ISO9001.
Export markets: United States, Italy.
