Russia screw pump with injection well-advanced technology and practical
September 18 03:04:04, 2022
In recent years, due to its low metal and energy consumption, screw pump devices can extract high-viscosity crude oil with high content of gas and mechanical impurities, and are increasingly used in the field of oil recovery. Russia developed a screw pump with the same well injection process, that is, using the principle of natural settlement of the formation out of the oil and water mixture in the wellbore oil and water separation, and in the well will be taken out of the associated water directly back into the formation process. Install the screw pump unit in the well. First, the worm of the upper screw pump is connected to the worm of the lower screw pump by means of a light rod passing through the sealing swivel, and then the cover is installed to form a supplementary passage that ensures that the injected water flows into the lower reservoir when the worm rotates. With the tubing string will be linked to each other two screw pump into the well. The two pump rotors are driven by a rotating sucker rod. The upper pump worm is connected to the lower pump worm via a polished rod that seals the swivel. Install a suction device that aspirates formation fluid below the upper pump and another suction device with a short tube below the lower pump. The spool passes packers installed between formation I and formation II. The lower pump is also fitted with a concentric housing that forms a sealed box. The oil-water mixture flowing out from the formation â… naturally separates in oil and water in the wellbore. Lighter oil moves upward into the upper suction unit and is drawn from the well through the upper pump tubing string. At the same time, the upper pump worm drives the lower pump worm through the polished rod to fill the upper space of the packer. The water in the lower part enters the lower pump inlet through the radial hole of the lower suction device and then passes through the sealed space of the outer cover, The slotted tube is injected into the absorbent layer II. In 2002, Russia started the same well injection test of screw-pump in the Ulusstamovsky oilfield. Before conducting the field test, the reliability of the same-well injection-production equipment and the possibility of direct oil-water separation in the well should be determined and oil recovery established And reservoir water injection testing and calculation system. In the pipeline to install a meter to detect the moisture content of the instrument for monitoring, the output port of the data can be transmitted to the wellhead computer. The pipeline is also fitted with a sensor that measures the amount of fluid produced, and the wellhead is equipped with a relief valve that releases annulus pressure to the outlet line. Wellhead computer to ensure that the device into manual or automatic working condition. With the program to ensure the system to maintain the best working condition of the lowest moisture content of the liquid harvesting, while continuous recording of device operating parameters (speed, moisture content, load current and shaft torque), and then complete the parameters of transmission, device work analysis, Chemical analysis of the laboratory liquid production moisture content and input device readings on the display work. Test well oil-water mixture was safely separated, the best screw pump speed of 110 rev / min. So far, the screw pump has been working continuously for 1340 days, the moisture content is controlled at 66% and the single well economic benefit is 351,500 rubles (about 90,000 USD).