Patent ID: 8430649

Claim:
A submersible pump system comprising: a submersible pump; a submersible motor coupled to said pump to provide power thereto; and a compensator assembly comprising: at least one longitudinally extending compensator in fluid communication with a supply of motor cooling liquid used in said motor, said at least one compensator comprising an engaging end, a floating end and a series of alternating crests and grooves extending along a longitudinal axis between said engaging and floating ends; a compensator housing disposed about said at least one compensator, said compensator housing comprising a proximal end and a remote end, said proximal end comprising a flange configured to connect said compensator housing to said motor and a conveying tube insertable into each of said motor and said at least one compensator to establish motor cooling liquid communication there between, said conveying tube defining a maximum amount of contraction of said at least one compensator past which said floating end cannot move, said remote end of said at least one compensator defining a point of maximum expansion past which said floating end cannot move, wherein said at least one compensator is possessive of a degree of elasticity sufficient for a width of at least one of said grooves to expand and contract in response to respective thermal expansion and contraction of said motor cooling liquid contained within at least one of said motor and said at least one compensator, said crests configured to contact an interior wall of said compensator housing to a degree sufficient to prevent a sliding of said crests along said interior wall and movement of said floating end relative to said engaging end with expansion and contraction of said width of the at least one of said grooves; and a pressure balancing line operable to control shuttling of said motor cooling liquid back and forth between said compensator and said motor.