An electric submersible pump includes a heat exchanger, a shaft comprising an axial bore, and a motor, which includes a rotor rotationally coupled to the shaft, a stator concentrically disposed with respect to the rotor, and a journal bearing disposed between the stator and the shaft. There is a gap between the rotor and the stator. The electric submersible pump further includes a first pump mechanically coupled to the shaft and configured to pump production fluid through a tubular, and a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger. The heat exchanger transfers heat from the coolant to the production fluid to cool the motor.

An electric submersible pump includes a heat exchanger, a shaft comprising an axial bore, and a motor, which includes a rotor rotationally coupled to the shaft, a stator concentrically disposed with respect to the rotor, and a journal bearing disposed between the stator and the shaft. There is a gap between the rotor and the stator. The electric submersible pump further includes a first pump mechanically coupled to the shaft and configured to pump production fluid through a tubular, and a second pump mechanically coupled to the shaft and configured to pump coolant through the axial bore, the gap, and the heat exchanger. The heat exchanger transfers heat from the coolant to the production fluid to cool the motor.

A radial force tool assembly has a first force-transmitting member with a first end with a first face and a second face, a first rear arm member having a first end face abutting the first face and a second end face, and a second rear arm member having a first end face abutting the second face and a second end face. The first end faces are curved so that when the first force-transmitting member moves towards the front, the first end face of the first rear arm member rolls on the first face, projecting the first rear arm member radially outwards in a first radial direction, and the first end face of the second rear arm member rolls on the second face, projecting the second rear arm member radially outwards in a second radial direction opposite the first direction while projecting the first and second rear arm members.

An artificial lift assembly and method relating thereto where a sleeve system is disposed above an electrical submersible pump. The sleeve system has a sliding sleeve at least partially carried within a ported case. The sliding sleeve blocks fluid flow through ports in the ported case. The sliding sleeve is restricted from movement relative to the ported case until a first predetermined pressure is applied to the sliding sleeve. Subsequent to the operating the electrical submersible pump, a plug is introduced to the sliding sleeve so as to block fluid flow through the sliding sleeve, Subsequent to introducing the plug, fluid pressure above the plug is increased until the sliding sleeve moves relative to the ported case such that fluid flow is allowed through the ports. Thereafter removing the artificial lift assembly from the wellbore.