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The tubular pump cylinder adopts a single-cylinder integrated structure, and the whole is a seamless steel pipe (whole cylinder type) or outer pipe + inner liner (combined type), which is directly fixed to the lower end of the tubing as an extension of the tubing, without additional nested parts.

Rod pump barrels corrosion is mainly due to complex underground media： One is that the chloride ions and sulfate ions contained in the highly mineralized formation water will destroy the passivation film on the metal surface of rod pump barrels and cause electrochemical corrosion;

Based on industry standards (API SPEC 11AX and GB18607), this article systematically explains rod pump barrel materials, hardening methods, plunger clearance, inspection standards, and key points for field use, providing a reference for oilfield procurement personnel.

In the core equipment system of oil extraction, the stable operation of downhole sucker rod pump is the key to ensuring the continuous oil production of oil fields and improving the efficiency of mining. With the continuous expansion of oilfield development scenarios, from conventional shallow wells to deep wells, ultra-deep wells, from ordinary reservoirs to complex reservoirs with high sulfur content and high mineralization, the working conditions faced by downhole sucker rod pump are becoming more and more serious. As the core pressure bearing and sealing component of downhole sucker rod pump, the pump barrel is directly related to the overall performance, service life and operating stability of the equipment. It has become an important research direction in the industry to optimize the performance of downhole sucker rod pump.​

As the core equipment in the field of oil and gas extraction, sucker rod pump's development history is closely linked to the global energy development process.

In the global energy development system, sucker rod pump, as a kind of oil and gas extraction equipment with reliable structure and controllable cost, has become an important equipment for the extraction of land oil and gas fields and conventional oil and gas reservoirs due to its strong adaptability to different geological conditions. Its application footprint is all over the major energy production areas, deeply supporting the stable operation of the global oil and gas supply.

In oil extraction equipment, tubing pump and rod pump are two mainstream types of manual lifting equipment. Although they belong to the same category of oil pumps, there are significant differences in structural design, applicable scenarios and performance. As an enterprise focusing on the research and development of petroleum extraction equipment, Tieling Dongsheng has deeply cultivated the API standard system. The APl rod pump we produce has become the preferred equipment for many oil fields due to its compliance and adaptability.

At present, the development of global oil and gas resources is gradually turning to the field of difficult to recover reserves, of which the proportion of heavy oil resources is increasing year by year. However, complex well conditions such as high temperature, high pressure, and high viscosity have become key bottlenecks restricting the efficient extraction of heavy oil. In this context, thermal recovery sucker rod pump, with its unique technical advantages, has gradually become the core equipment for solving complex well mining problems. Its precise positioning of adapted well conditions provides important support for improving the efficiency of oilfield development.

In the field of heavy oil and high-viscosity crude oil extraction, the performance of thermal recovery sucker rod pump directly determines the recovery efficiency and operating costs of oil fields. As a professional manufacturer in the field of domestic petroleum machinery, Tieling Dongsheng relies on in-depth research on thermal mining conditions to create the thermal recovery sucker rod pump.

In the field of industrial fluid delivery, pumps, as key power equipment, support the operation of multiple industries. According to the basic theory classification of pumps, its core types can be divided into three categories according to the working principle: positive displacement pumps, dynamic pumps and other types of pumps.