Weatherford Technology Holdings, LLC

Precision Energy Services, Inc.

Peter J Schoch

Lucio Nelson Tello

Thomas Jay Blankinship

Graeme Montgomery

Gregory J Caston

Ricardo Reyes

William David Iwanicki

Stephanie A Michels

Thomas J Blankinship

Wade S Maxfield

A method and apparatus for normalizing an acoustic wellbore tool by correcting measured sector acoustic signals due to changes in pressure and temperature downhole, the method and apparatus comprising an acoustic wellbore tool having at least one monopole transmitter and monopole receiver, and one or more sector transmitters and receivers disposed along the longitudinal axis of the tool, determining the attenuation values of received monopole and sector acoustic signals, determining a correction ratio using an average sector attenuation value and a theoretical attenuation value, and correcting the sector acoustic signals using the correction ratio.

Normalization of sector amplitudes using monopole amplitudes

A memory logging system for determining the status of a sliding sleeve valve disposed within the borehole. The sliding sleeve contains signal inducing devices. A logging tool is conveyed through the sliding sleeve and time intervals between sensor excursions induced by the sleeve's signal inducing devices are recorded and stored within the tool memory. These data are subsequently recovered when the tool is returned to the surface of the earth, and sensor excursion data are processed in a surface processor to ascertain relative axial positions of the sliding sleeve outer housing and the insert. The condition of the sliding sleeve is determined from these relative axial positions.

Memory logging system for determining the condition of a sliding sleeve

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Benbrook, TX, United States of America

Peter J Schoch