Electromagnetic telemetry for sensor systems deployed in a borehole environment

US10760413B2 · kind B2 · utility

Assignee

• Halliburton Energy Services, Inc. · US

Inventors

• Glenn Andrew Wilson · Singapore, SG
• Ahmed Elsayed Fouda · Spring, US
• Burkay Donderici · Houston, US
• Li Gao · Katy, US
• Krishna M. Ravi · Kingwood, US
• Mark W. Roberson · Cary, US
• Scott Goodwin · Chapel Hill, US
• Charles Bartee · Morrisville, US
• Alexander Stewart · Morrisville, US

Key dates

• Filing date: Dec 31, 2014
• Grant date: Sep 1, 2020
• Expiry date: Jan 16, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V11/002
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Disclosed are telemetry systems and methods that employ a plurality of electromagnetic transceivers disposed outside a well casing string at a corresponding plurality of depths along the casing string. Each transceiver includes one or more toroidal inductors circumferentially surrounding the casing string and inductively coupled thereto to allow signal transmission between transceivers via currents induced in the casing. In some embodiments, signals are relayed via a chain of transceivers to facilitate indirect communication between a surface facility and other transceivers located too deep for direct communication to the surface.