Modified tubular equipped with a tilted or transverse magnetic dipole for downhole logging

US6836218B2 · kind B2 · utility

Assignee

• SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

• Mark Frey · Sugar Land, US
• Dzevat Omeragic · Lexington, US
• Jacques R. Tabanou · Houston, US

Key dates

• Filing date: Dec 18, 2001
• Grant date: Dec 28, 2004
• Expiry date: Apr 23, 2023

Classification

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

Abstract

Method and system for subsurface logging utilizing a modified metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a support member. The tubular including slotted stations to provide through-tubular signal transmission and/or reception. Pressure barrier means provide hydraulic isolation at the slotted stations. The support member is equipped with various sources and sensors, including an antenna adapted to generate a magnetic dipole moment with a transverse or controllable orientation, and adapted for engagement within the tubular. The apparatus is suitable for LWT, LWD, and TLC logging operations.