When the downhole sucker rod pump is working, the pump barrel needs to withstand the friction caused by the reciprocating movement of the plunger, the corrosion of the crude oil medium, and the complex pressure and temperature changes underground for a long time. If the material performance of the pump barrel is insufficient, it is prone to problems such as excessive wear, corrosion and leakage, or deformation caused by insufficient strength, which directly affects the pumping efficiency of the downhole sucker rod pump. For example, in high-sulfur reservoirs, ordinary carbon steel pump cylinders are susceptible to sulfide corrosion, and inner wall potholes and sealing failures will occur in a short period of time, resulting in crude oil leakage, which not only reduces the pumping efficiency, but also requires frequent downtime to replace the pump cylinder, increasing the cost of oilfield operation and maintenance; And in deep well mining, if the material strength of the pump cylinder is not enough, it may be deformed in the face of the underground high-pressure environment, which will cause abnormal gaps between the plunger and the pump cylinder, further exacerbating the risk of equipment failure.
From the perspective of industry practice, high-quality pump barrel materials need to take into account the three core characteristics of wear resistance, corrosion resistance and mechanical strength. At present, the industry has gradually promoted the use of alloy steel, stainless steel and pump barrels made of surface reinforced materials. Among them, alloy steel has improved the overall strength and wear resistance of the material by adjusting the composition ratio, which is suitable for conventional deep well mining; Stainless steel material, with its excellent corrosion resistance, has become an ideal choice for complex oil reservoirs such as high sulfur content and high mineralization; And the pump cylinder that has undergone enhanced treatment such as surface coating and nitriding can further improve the surface hardness and corrosion resistance on the basis of the original material, and extend the service life of the equipment.
Choosing the appropriate pump barrel material can not only reduce the frequency of failures of the downhole sucker rod pump, reduce the maintenance cost of the oilfield, but also ensure the efficient operation of the equipment under different working conditions, and provide strong support for the stable extraction of crude oil. With the continuous progress of petroleum extraction technology, the performance requirements of the pump barrel material will continue to increase, promoting the industry to continuously explore better quality and more suitable material solutions.
As a deep cultivator in the field of petroleum equipment, Dongsheng enterprise has always focused on the technical improvement of the core components of downhole sucker rod pump. In the selection and research and development of pump barrel materials, it fully combines the characteristics of different oilfield working conditions, selects suitable high-quality materials, and strictly controls the production process, so that each pump barrel can meet the needs of downhole sucker rod pump for efficient and stable operation, helping oil fields to improve mining efficiency and promote the high-quality development of the petroleum industry.