This paper describes some aspects of innovative small diameter electric pump systems which are being developed to be able to be installed in 2? inch production tubing using cable deployment, eliminating the need for a rig during pump installation and retrieval operations in the field. The systems can be used to economically produce deep low-rate gas wells, increase ultimate recovery and reserves by de-watering deeper mature wells, and enable production by retrofit installation through small diameter production tubing. The downhole unit consists of a permanent magnet motor driving a pump. This concept required novel solutions in many areas, particularly motor design and electric drive, protector design, bearing and seal systems. The downhole unit includes monitoring of inlet and discharge pressures, temperature and vibration. The complete systems include cable, connectors, and the associated surface equipment which has a favourable environmental footprint.
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