What is a sucker rod?

A sucker rod is a long, hollow, steel pipe used in oil production to transfer pumping power from the surface to the downhole pump, which moves the oil to the surface. It is threaded at both ends, with male threads on one end and female threads on the other, allowing multiple rods to be threaded together to reach the desired depth of the well. Sucker rods come in different lengths and diameters and are made from various materials, including carbon steel, chrome-molybdenum alloy steel, and fiberglass. They are designed to be strong, durable, and able to withstand high-pressure pumping. The strength and flexibility of sucker rods are crucial in oil production and can impact the efficiency and profitability of a well.