artificial-lift

This process is used to increase the flow of liquids, such as oil, from a well with inadequate pressure driving the fluid to the surface. For the most part, all wells require a method of artificial lift at some point due to depleted pressure over time. This process can be accomplished through several methods, one being a positive-displacement downhole pump or by using a downhole centrifugal pump. By doing so, the flowing pressure is lowered at the pump intake causing backpressure on the liquid moving it through the production system

Most of the oil wells in the US (96%) use an artificial lift from the beginning of the well’s production life. The most common methods of artificial lifts are hydraulic pumps, electric submersible pumps (ESP), gas lifts and sucker-rod (beam) pumps. The greater part of US wells use a beam pump, approximately 350,000.

Toward the end of a well’s production life, it is commonly referred to as a “stripper well”. Of these, the vast majority are lifted with beam pumps, with the majority of the non-stripper wells using the gas lift method. Statistically, offshore and non-stripper wells predominately use the ESP or gas lift method. Whereas, wells operating onshore are more likely to use a sucker-rod (beam) pump.

When sizing a pump shaft, it is essential to consider not only the maximum torques and permissible shaft deflections, but also any bending and torsional vibrations. At Double Eagle Alloys, we have an experienced staff of metal specialists and an on-staff metallurgist to assist you when inquiring or ordering finished shafts.

 

Sources:

Petrowiki | Schlumberger | Rigzone