公开(公告)号：US20170184657A1

公开(公告)日：2017-06-29

申请号：US15309529

申请日：2015-05-14

Applicant: General Electric Company

Inventor： Prabhakar NETI ,  Yingneng ZHOU ,  Liwei HAO

IPC: G01R31/12 ,  E21B41/00 ,  H01B9/02 ,  E21B17/00 ,  G01R31/02 ,  H02G9/02 ,  E21B47/00 ,  E21B43/12

CPC classification number: G01R31/1272 ,  E21B17/003 ,  E21B41/0092 ,  E21B43/128 ,  E21B47/0007 ,  E21B47/12 ,  F04D13/0693 ,  F04D13/086 ,  G01R31/021 ,  H01B9/02 ,  H02G9/02

Abstract: A system (100, 200) is presented. The system includes a fluid lifting device (102, 202) located inside a well (106, 206), and comprising an electrical motor (108, 208), a three phase cable (114, 214) for coupling the fluid lifting device to a power source (112, 212), at least one high sensitivity differential current transformer (104, 203, 204) for generating imbalance signals (128, 227) representative of an imbalance current in at least one of the electrical motor and the three phase cable, wherein the at least one high sensitivity differential current transformer is disposed such that the at least one high sensitivity differential current transformer surrounds at least a portion of the three phase cable, and a processing subsystem (136, 236) for monitoring the health of at least one of the fluid lifting device and the three phase cable based on the imbalance signals.