Overview  •  Well  •  Motor  •  Downhole sensor  •  Seal section  •  Pump 
Intake/Gas Separator  •  Tubing  •  Wellhead  •  Cable  •    J-box  •  Switchboard  •  Transformer  •   Conclusion

The well is basically a hole that has been bored into the earths crust to provide a passageway for the flow of oil from a reservoir to the surface. After a well is drilled, it is lined with a steel casing that is cemented into the surrounding rock. Casings are manufactured in standard diameters that range from 4 1/2 inches to 13 5/8 inches OD. Wells can vary in depth from 300 ft to over 20,000 ft.