Mechanical shaft stop in a rotating machine

A method of assembling a rotating machine, comprising:

• coupling a component to a drive shaft, wherein the component is configured to do work as the drive shaft turns;
• sliding a compression stop that defines a plurality of female threaded bores over the drive shaft;
• sliding a collet over the drive shaft to abut the compression stop, wherein the collet defines a plurality of through bores;
• sliding a compressor flange that defines a plurality of through bores over the drive shaft;
• installing a plurality of bolts having male threads into the through bores of the compressor flange and threading the plurality of bolts into the female threaded bores of the compression stop;
• tightening the plurality of bolts to move the compressor flange to urge the collet into compression to establish a friction fit between the collet and the drive shaft;
• and
• installing the drive shaft, the component that is configured to do work as the drive shaft turns, the compression stop, the collet, and the compressor flange into a tubular housing.

A method of lifting fluid in a wellbore, comprising:

• running an electric submersible pump (ESP) assembly into the wellbore, wherein the ESP assembly comprises
• an electric motor having a first drive shaft;
• a tubular housing;
• a second drive shaft disposed at least partly inside the tubular housing that is coupled to the first drive shaft;
• a fluid mover disposed inside of the tubular housing that is coupled to the second drive shaft;
• and
• a shaft stop assembly coupled to the second drive shaft comprising
• a collet disposed around the second drive shaft, wherein the collet defines a plurality of through bores,
• a compressor flange disposed around the collet and around the second drive shaft and engaging with the collet to compress the collet to form a friction fit with the second drive shaft, wherein the compressor flange defines a plurality of through bores,
• a compression stop disposed around the compressor flange and around the second drive shaft, wherein a first axial end of the compression stop abuts an end of the collet and wherein the compression stop defines a plurality of female threaded bores, and
• a plurality of bolts having male threads, wherein the plurality of bolts are threaded into the female threaded bores of the compression stop to compress the collet to form the friction fit with the second drive shaft;
• providing electric power to the electric motor;
• moving fluid by the fluid mover;
• and
• lifting fluid in a production tubing disposed in the wellbore and coupled to the ESP assembly.

A rotating machine, comprising:

• a tubular housing;
• a drive shaft disposed at least partly inside the tubular housing;
• a component disposed inside of the tubular housing that is coupled to the drive shaft and configured to do work as the drive shaft rotates;
• and
• a shaft stop assembly coupled to the drive shaft comprising
• a shaft stop assembly coupled to the drive shaft comprising
• a collet disposed around the drive shaft, wherein the collet defines a plurality of through bores, and wherein the collet defines a plurality of gaps and wherein a first axial end of the compression stop abuts an end of the collet,
• a compressor flange disposed around the collet and around the drive shaft and engaging with the collet to compress the collet to form a friction fit with the drive shaft, wherein the compressor flange defines a plurality of through bores,
• a compression stop disposed around the compressor flange and around the drive shaft, wherein a first axial end of the compression stop abuts an end of the collet and wherein the compression stop defines a plurality of female threaded bores, and
• a plurality of bolts having male threads, wherein the plurality of bolts are threaded into the female threaded bores of the compression stop to compress the collet to form the friction fit with the drive shaft.