Gear pump is a rotary positive displacement pump, it has the advantages of positive displacement pump and centrifugal pump. Gear pump moving parts less. No valve parts and complex flow channel, good suction performance, small hydraulic loss reporting, continuous and uniform lifting medium. The planetary movement of the spider rod in the bush acts as a stirrer. Suction and discharge make Itd body prepull is not easy to deposit, the brand of solid, liquid, gas three-phase medium stick stick effect, not easy to appear pump and gas lock phenomenon. Therefore, ground driven gear pump oil recovery as an artificial lift method. It has the following characteristics
(1) high pump efficiency, bamboo energy, low maintenance costs. Because the gear pump working load to the fixed. The pump efficiency can reach 909E, which is one of the mechanical oil recovery methods with low energy consumption and high efficiency.
(2) Less one-time investment. Compared with electric submersible pump, hydraulic piston pump and beam (chain) pump. The structure of gear oil pump is simple and the one-time investment site is low.
(3) Suitable for heavy oil exploitation: Generally speaking, gear oil pump is suitable for crude oil exploitation with viscosity below 8000mPa·. Therefore, most heavy oil Wells can be used.
(4) To adapt to high gas Wells: rod pump will not occur gas talk, so it is more suitable for oil and gas mixing, but the free gas of the underground pump population will affect the qi product effect book.
(5) Adapt to high sand Wells. In theory, the screw pump can deliver up to 80% of the sand site. In crude oil sand content of up to 40% of the situation can be normal production.
(6) Suitable for offshore oil IH pure well group and horizontal well. Gear oil pump can be run in straight and inclined section, and the equipment covers a small area, so it is suitable for offshore oil production.
