Seal section with parallel bag sections

摘要

A downhole pumping system includes a motor, a pump driven by the motor and a seal section positioned between the pump and the motor. The seal section preferably includes a first seal bag assembly, a second seal bag assembly and an interconnect module connected between the first seal bag assembly and the second seal bag assembly. The interconnect module includes a plenum, at least one fluid exchange passage connected to the plenum, and a shaft seal assembly. The shaft seal assembly is configured to divert fluid from the plenum into the at least one fluid exchange passage. In another aspect, a first group of interconnect modules within the seal section each includes a shaft seal assembly oriented in a first direction and a second group of the interconnect modules each includes a shaft seal assembly oriented in a second direction to selectively apply an axial force on the shaft.

主权项

1. A seal section for use in a downhole pumping system, wherein the seal section comprises:
a first seal bag assembly and a second seal bag assembly connected in a parallel arrangement, wherein each of the first and second seal bag assemblies comprises:
a bag support tube,a seal bag retention mechanism, anda seal bag that includes a non-turbulent interior space; a shaft extending through the bag support tube of each of the first and second seal bag assemblies; an annular space between the shaft and the bag support tube of each of the first and second seal bag assemblies, wherein the annular space comprises a turbulent region; and an interconnect module, wherein the interconnect module comprises a fluid diverter to direct fluid from the turbulent annular space of the first seal bag assembly into the non-turbulent interior space of the seal bag of the second seal bag assembly.