High temperature motor seal for artificial lift system

A motor seal for a submersible electric motor, comprising:

• a thermal compensator, comprising:
• a guide tube for receiving a shaft of the motor seal, wherein the guide tube has a port formed through a wall thereof;
• a metallic bag disposed around the guide tube and having an expansion profile formed in at least a portion thereof to accommodate radial and circumferential expansion of the metallic bag;
• a pair of flanges attached to opposite ends of the metallic bag;
• and
• a pair of adapters fastened to the respective flanges and receiving respective ends of the guide tube;
• and
• a housing having tube sections and bulkhead sections,
• wherein:
• the thermal compensator is disposed in a compensation chamber formed between adjacent bulkhead sections and divides the chamber into an outer portion and an inner portion,
• an outer surface of the metallic bag is exposed to one of the tube sections, and
• an inner surface of the metallic bag is exposed to the guide tube;
• a thrust bearing having a runner connected to the shaft and a carrier connected to the housing and disposed in a thrust chamber formed between adjacent bulkhead sections, the thrust chamber being in fluid communication with the inner chamber portion;
• and
• a rotating seal sealing an interface between the shaft and the housing.