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Discover how Dongsheng anti-sand sucker rod pumps utilize advanced scraping technology and Tungsten Carbide coatings to prevent plunger sticking and extend run-life in high-sand oil wells.

Abstract: In oil production, sand-heavy well conditions are the primary driver of premature subsurface pump failure. Standard API 11AX components often fall short when facing severe abrasive wear. As a factory with deep customization capabilities, Dongsheng Rod Pump explores how to break through the limitations of standard parts through optimized plunger groove designs, micron-level clearance control, and advanced metallurgy to maximize the Mean Time Between Failures (MTBF).

1.1 Analysis of Pump Inspection Causes: Casing failure has produced the biggest number of Deep-Well Sucker Rod Pump issues which lead to more than 50% of all pump inspections. Among these, the major causes are the broken traveling valve cover, pump leakage, and the bleeder problems. The traveling valve cover is the one that connects the sucker rod and the Sucker Rod Pump and at the same time assures that liquid is pumped out from the piston. The upward pull of the sucker rod, the weight of the sucker rod itself, and the friction between the pump barrel and the piston are the factors that the cover faces during production.

When something feels “off” on a well site, engineers usually don't start with paperwork. They start by checking the wellhead pressure and sound. These two things reveal more about a well's condition than most dashboards and reports. Below is a practical guide based on our field experience and overseas service work with customers in the Middle East, South America, Africa, and Central Asia.

Although newer lift methods such as ESPs and jet pumps remain essential in many wells, field engineers across several basins—including Changqing, Xinjiang, and parts of the Bohai Rim—report a noticeable shift: when reservoir behavior becomes unpredictable, a sucker rod pump​ often performs with more stability and lower maintenance costs.

How to Select a Sucker Rod Pump: Well data to be collected before pump selection: a) Oil layer depth, effective thickness, effective permeability; b) Casing specifications, well inclination, azimuth, well bends, and other technical conditions; c) Well fluid production index, static fluid level, dynamic fluid level; d) Crude oil surface and underground viscosity, and well sand production, wax deposition, scaling, and corrosion; e) Well production, water cut, gas-oil ratio, and other production conditions; f) Well production history.

Sucker rod pumping is the most common artificial lift method both domestically and internationally: Venezuela: 70% of oil wells are pumped using rod pumps. The United States: 85% of oil wells are pumped using rod pumps. Russia: Over 55% of oil wells are pumped using rod pumps. China: Over 80% of oil wells use sucker rod pumps, accounting for 75% of total oil production. Rod pumps play a crucial role in my country's oil extraction.

The importance of the sucker rod pump: Although it accounts for a small proportion of the total cost and weight of a complete rod-operated pumping unit, it is a key component determining the technical and economic indicators of the unit. The operating condition of the sucker rod pump significantly affects the service life of the surface pumping unit and sucker rod. Factors such as plunger jamming, delayed opening and closing of pump valves, and excessive pump clearance volume can all cause overload and malfunction of the pumping unit and sucker rod, leading to well collapse. A schematic diagram of the structure and operation of a sucker rod pump is shown in the figure.

Artificial lifting is a process where, when the natural energy of the formation is insufficient to sustain natural flow production, or although natural flow is possible but the production rate is insufficient, mechanical equipment is installed in the wellbore to work on the fluid, allowing it to flow to the surface.

Recently, while studying the fundamentals of oil exploration, we were once again struck by the complexity of the oil production chain: from how oil and gas are formed, stored, and migrated, to their final extraction through the wellhead, each step requires extensive geological and engineering expertise. In this entire process, once reservoir conditions are confirmed and production begins, one of the most critical pieces of equipment downhole is the Sucker Rod Pump.