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I. The Crucial Role of Rod Pump Barrels in the Oil Extraction Industry Oil, as a vital resource for global economic development, has long held a pivotal position in the energy structure. Whether in transportation, chemical raw materials, or power generation, oil and its derivatives remain an indispensable energy source for modern society. Despite the rapid development of new energy technologies, oil extraction will continue to be a crucial pillar of global energy supply in the foreseeable future.

In oil extraction operations, rod pump barrels is the core component of the tubing pump, and the operating status directly determines the oil recovery efficiency and operating cost. Once rod pump barrels fail, it will not only cause oil production to be interrupted, but may also cause complex underground problems, increasing the difficulty of maintenance and economic losses.

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 process of crude oil extraction, sucker rod pump barrel leakage is a common problem, which not only causes delays and energy waste, but also may cause problems such as liquid hammer and vibration, and accelerate the damage of components such as plungers and valve groups. Pollute the well site environment and even cause fire hazards. So, what causes pump barrel leakage? How should we effectively reduce pump barrel leakage?