Apparatus and method for clock shift correction for measurement-while-drilling measurements

US8902695B2 · kind B2 · utility

Assignee

• Baker Hughes Holdings LLC · US

Inventors

• Dmitriy Dashevskiy · Bad Doberan, DE
• Patrick J. McGinley · Sugar Land, US
• John D. Macpherson · Spring, US
• Andrew Brooks · Thiensville, US
• Thomas Dahl · Wendeburg, DE
• Mitchell G. Pinnell · Conroe, US
• Paul Cairns · Calgary, CA
• Robin F. Randall · Spring, US
• Mark Andrew Hill · Houston, US
• Edward W. Robnett · Kingwood, US

Key dates

• Filing date: Dec 3, 2007
• Grant date: Dec 2, 2014
• Expiry date: Jan 18, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V2200/12
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The disclosure provides a method which includes transmitting signals over a time period between a downhole location and a surface location during drilling of a wellbore; recording the time of each signal at the surface using a surface clock and the time of each signal downhole using a downhole clock; and correcting the downhole measurements using the recorded times.