Search International and National Patent Collections

1. (WO2018052450) POWERING DOWNHOLE COMPONENTS IN SUBSURFACE FORMATIONS BEHIND CASING

Pub. No.:    WO/2018/052450    International Application No.:    PCT/US2016/052466
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Tue Sep 20 01:59:59 CEST 2016
IPC: E21B 41/00
E21B 47/00
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: SAN MARTIN, Luis E.
FOUDA, Ahmed E.
DONDERICI, Burkay
Title: POWERING DOWNHOLE COMPONENTS IN SUBSURFACE FORMATIONS BEHIND CASING
Abstract:
A system and method according to which a downhole component positioned behind a casing is powered, the casing extending within an oil and gas wellbore that traverses a subterranean formation. Powering the downhole component may include inducing an electrical current to flow in the casing; permitting the electrical current to flow out of the casing to create a first potential difference between a first point and a second point spaced therefrom, the first and second points being located behind the casing; utilizing the first potential difference to store electrical power; and supplying the stored electrical power to the downhole component positioned behind the casing to thereby power the downhole component. The system may include a power source in electrical communication with the casing; a power harvester positioned behind the casing and in electrical communication with the downhole component; and a current return unit in electrical communication with the power source.