公开(公告)号：US20240337169A1

公开(公告)日：2024-10-10

申请号：US18604755

申请日：2024-03-14

Applicant: ExxonMobil Technology and Engineering Company

Inventor： Michael C. ROMER ,  Derek B. BUSH

IPC: E21B33/12 ,  E21B43/10 ,  E21B43/12

CPC classification number: E21B33/1208 ,  E21B43/105 ,  E21B43/128

Abstract: An electric submersible pump (ESP) system is described herein. The ESP system includes a pump and a motor connected to drive the pump. The pump and motor are disposed to pump fluid into production tubing in a wellbore. The motor produces heat when operating. The wellbore contains wellbore fluids. A seal unit is connected between the motor and the pump. The seal unit contains oil to lubricate the motor. Further, the seal unit receives heat from the motor when the motor is running. The seal unit contains a structure to reduce loss of heat after the motor stops running to reduce an exchange of oil from the seal unit to the wellbore and to reduce an exchange of wellbore fluids from the wellbore to the seal unit.