Threaded Connection with Secure Shoulder Ring for Electrical Submersible Pump

摘要

An electrical submersible pump assembly has modules including a pump, a motor, and a seal section. A drive shaft assembly extends from the motor through each of the modules. A threaded connection between at least two of the modules includes a first adapter having external threads and a second adapter having a neck with an external load shoulder. A collar is rotatably carried and axially movable on the neck. The collar has internal threads and an internal load shoulder. A shoulder ring having two segments encircles the neck. The shoulder ring has a first surface in abutment with the external load shoulder and a second surface in abutment with the internal load shoulder. A resilient ring tits around an outer diameter of the shoulder ring for retaining the ring segments on the neck prior to the collar being in threaded engagement with the threads of the first adapter.

主权项

1. An electrical submersible pump assembly, comprising:
a plurality of modules including a pump and a motor; a drive shaft assembly having an axis and extending from the motor through each of the modules; a threaded connection between at least two of the modules, comprising: a first adapter having threads; a second adapter having a neck with an external load shoulder; a collar rotatably carried and axially movable on the neck, the collar being in threaded engagement with the threads of the first adapter, the collar having an internal load shoulder axially spaced from and facing in a direction opposite to the external load shoulder; a shoulder ring encircling the neck and comprising a plurality of separate ring segments, the shoulder ring having a first surface in abutment with the external load shoulder and a second surface in abutment with the internal load shoulder to transfer an axial load between the first and second adapters; and retaining means for retaining the ring segments on the neck prior to the collar being in threaded engagement with the threads of the first adapter, the retaining means remaining a part of the assembly after the collar is secured to the first adapter.