Electric submersible pumping unit

Abstract

An electric submersible pump assembly with integral heat exchanger, high-speed self-aligning bearings, and dual bearing thrust chamber is described. The described pump assembly, modules, and components may be used for operating an electric submersible pump at high speeds as well as over a wide range of speeds and flowrates without replacing downhole equipment. The described pump assembly may be shorter than comparable pump assemblies and may be assembled offsite, thereby leading to faster and easier installation with less down time. By operating over a wide range of speeds, the disclosed pump assembly allows the operator to reduce overall inventory, reduce down time for the well, and avoid other complications associated with replacing a pump assembly or other downhole components.

We claim: 
     
         1 . A motor for an electrical submersible pump assembly, the motor comprising:
 a head module;   a power module;   a base module;   and a single-piece housing coupling comprising a first end and a second end, the first end of the single-piece housing coupling comprising threads which turn in a first direction, the second end of the single-piece housing coupling comprising threads which turn in a second direction, wherein the base module is joined directly to the power module using the single-piece housing coupling.