Anti-Sand Sucker Rod Pump: Engineering Solutions for High-Sand Oil Wells:
In oilfield production, sand interference is the primary cause of downhole pump failure. When sand particles enter the precision clearance between the plunger and the barrel, the result is abrasive wear, plunger sticking, and immediate production loss.
At Dongsheng, we don't just sell pumps; we provide artificial lift strategies engineered to maximize your Mean Time Between Failures (MTBF) in the world’s most challenging reservoirs.
How It Works: The Mechanics of Sand Protection:
To a petroleum engineer, the secret to longevity lies in the stroke. Our anti-sand pumps utilize a specialized Mechanical Scraping System that actively manages solids during every cycle.
The Pumping Cycle Dynamics:
On the Downstroke: The precision-engineered alloy scraping rings on the plunger lead the way, "wiping" the barrel wall clean of sand cake and debris. This maintains a clean surface for the sealing section of the plunger.
On the Upstroke: The scrapers prevent sand from settling into the tight clearance. By optimizing the flow velocity through the valve cage, sand remains suspended in the fluid and is carried out of the pump barrel.
Technical Precision (The Expertise Factor):
We maintain a rigorous fit clearance of 0.002 to 0.005 inches (depending on fluid viscosity and temperature). This specific clearance is tight enough to maintain high volumetric efficiency but loose enough—when combined with our scraping technology—to prevent "sand-lock" during temporary shutdowns.
Technical Comparison: Insert Pumps vs. Tubing Pumps in Sandy Wells
Choosing the right pump type is critical for long-term OpEx reduction. Here is how they compare in sandy environments:
| Feature | Insert Pump (RHB / RHA) | Tubing Pump (TH) |
| Sand Handling | Excellent. Easier to integrate specialized sand scrapers. | Moderate. Prone to "sand bridging" above the plunger. |
| Workover Cost | Low. The entire pump can be pulled via the rod string. | High. Requires pulling the entire tubing string. |
| Volumetric Capacity | Limited by the ID of the tubing. | Maximum possible for a given tubing size. |
| The Dongsheng Verdict | Recommended for high-sand wells to minimize workover downtime. | Recommended only for high-volume wells with mild sand. |
Material Science: Tungsten Carbide vs. Standard Chrome
Why do Dongsheng pumps last longer? We invest in superior surface metallurgy.
Standard API Pumps: Often use Chrome plating (approx. 800-900 HV). While good for friction, it can be "pitted" by hard quartz sand.
Dongsheng Premium Series: We offer Tungsten Carbide (TC) Thermal Spraying on both the plunger and barrel. With a hardness of HV1100-1300, TC is virtually impervious to the scouring action of sand, extending the pump's wear life by 300% to 500% compared to standard materials.
FAQ:
Q: What is the maximum sand concentration Dongshenf pumps can handle?
R: Nuestras bombas antiarena especializadas estilo RHBM pueden gestionar eficazmente concentraciones de arena de hasta 1,5 % - 3,0 % por volumen, dependiendo del tamaño de partícula y la viscosidad del fluido.
P: ¿Pueden estas bombas manejar petróleo de alta viscosidad (pesado)?
R: Sí. Para petróleo pesado, ajustamos el diseño de la jaula de la válvula para reducir la resistencia al flujo y utilizamos bolas/asientos de gran tamaño para garantizar que las válvulas se cierren rápidamente incluso en fluidos espesos.
P: ¿Las bombas Dongsheng cumplen con la norma API 11AX?
R: Por supuesto. Todas las bombas de varilla Dongsheng se fabrican en instalaciones con certificación API, lo que garantiza que todas las roscas, holguras y calidades de los materiales cumplen o superan las normas internacionales para yacimientos petrolíferos.
Conclusión y recursos
Optimizar el rendimiento de sus pozos requiere más que una simple bomba estándar; requiere una solución de ingeniería. Dongsheng combina décadas de experiencia en campo con la ciencia de materiales avanzada para mantener su petróleo en circulación.