Abstract: Corrosion-resistant tools for use in oil and/or gas wells are described. These tools include at least one component formed of a metal that has a lower density and different physical properties than steel and also a lower resistance to acids in the well environment. The lower density component may be formed of an aluminum alloy and may be shielded by steel components and sealing components of the tool.

Abstract: Corrosion-resistant tools for use in oil and/or gas wells are described. These tools include at least one component formed of a metal that has a lower density and different physical properties than steel and also a lower resistance to acids in the well environment. The lower density component may be formed of an aluminum alloy and may be shielded by steel components and sealing components of the tool.

Abstract: Generally, embodiments described herein take the form of a shrouded band-pass filter that ensures liquid flow past the filter while reducing or minimizing gas contact with the filter. A shroud encircles the band-pass filter and is affixed to a dip tube (to which the band-pass filter is also affixed). The shroud and band-pass filter are contained within tubing within the oil well. As the pump operates, a fluid and gas mixture is drawn into the tube by operation of the pump. Gas may exit the tubing through vents while the fluid flows downward within the tubing. Fluid flows around the shroud and thus past the band-pass filter, before entering a dip tube via a strainer positioned within the shroud and above the filter. The dip tube permits the fluid to flow upward and, ultimately, out of the oil well as the pump operates.