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In the early stage of oil field exploitation, the oil reservoir often has a large amount of energy, and the oil can flow from underground to the ground by energy. As the energy of the oil reservoir is continuously consumed, when the energy of the oil reservoir is not enough to make the oil flow to the ground along the wellbore by its own energy, it is necessary to supplement the energy artificially to make the oil be extracted to the ground, which we collectively call artificial lift.

API subsurface rod pump, polished rod and coupling are components of rod pumping equipment, which transmit the power of the pumping unit to the downhole pump. The API subsurface rod pump column is made up of dozens or hundreds of API subsurface rod pumps connected by couplings. During the oil production process, the API subsurface rod pump column is subjected to asymmetric cyclic loads, and the working medium is well fluid (crude oil and mineral water), and the well fluid of many pumping wells contains corrosive media. Therefore, the main failure form of API rod pump is fatigue fracture or corrosion fatigue fracture. The breakage accident of API subsurface rod pump will seriously affect the crude oil production, increase the cost of well repair, and increase the cost of crude oil.

Dongsheng has been established for more than ten years, and our team has been dealing with API subsurface rod pumps for a long time. Every time a customer asks us why many old wells and low-yield wells will eventually choose API subsurface rod pumps to maintain production, I always say that it is not because we sell a lot, but because this equipment is really durable.