Well having inductively coupled power and signal transmission

US7882892B2 · kind B2 · utility

Assignee

• STATOIL ASA · NO

Inventors

• Bjømar Svenning · Trondheim, NO
• Bjarne Bugten · Saksvik, NO

Key dates

• Filing date: Jun 28, 2006
• Grant date: Feb 8, 2011
• Expiry date: Nov 10, 2026

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B17/0283
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

Well for production of hydrocarbons, comprising a hole drilled down into an underground, a casing fastened to the hole wall, a production pipe that extends into the casing from the surface and down to a hydrocarbon-containing zone, a hanger on the surface in an upper end of the well, in which hanger the production pipe and casing are hung up and electrically short-circuited, and a packer arranged sealingly and electrically short-circuiting in the annulus between the production pipe and the casing, in or close to a lower end of the well, distinguished in that the well further comprises: a primary coil arranged concentrically about the production pipe, a secondary coil arranged concentrically about the production pipe, a load connected to the secondary coil, and an alternating current generator/signal unit connected to the primary coil.