Abstract: Electric submersible pumping systems are exposed to harsh chemicals in the downhole environment. Conductors used in the electric submersible pumping system must be shielded against these chemicals. To improve the resistance of conductors to hydrogen sulfide and other aggressive chemicals, an improved insulation system includes an interior layer applied to the conductor, a first outer layer, and an intermediate layer between the interior layer and the first outer layer. The intermediate layer can be a nano-composite layer that includes a mixture of nanoparticles in a polyether ether ketone (PEEK) polymer.

Abstract: An electric submersible pumping system includes a motor, a pump driven by the motor, and a cable that provides electrical power to the motor. The cable includes a conductor and an insulator surrounding the conductor. The insulator includes a first layer surrounding the conductor and a second layer surrounding the first layer. The insulator may include an H2S scavenger and an H2S reactant in the first or second layers surrounding the conductor. The cable optionally includes a sub-insulator layer that includes a metal or nitride coating applied directly to the conductor.

Abstract: An electric submersible pumping system includes a motor, a pump driven by the motor, and a cable that provides electrical power to the motor. The cable includes a conductor and an insulator surrounding the conductor. The insulator includes a first layer surrounding the conductor and a second layer surrounding the first layer. The insulator may include an H2S scavenger and an H2S reactant in the first or second layers surrounding the conductor. The cable optionally includes a sub-insulator layer that includes a metal or nitride coating applied directly to the conductor.