Halliburton Energy Services, Inc.

Baker Hughes Corporation

Tim W Geerits

James Robert Birchak

Paul F Rodney

Eugene J Linyaev

Denis P Schmitt

Wei Han

Holger Mathiszik

Jeroen J Groenenboom

Olaf Hellwig

Thomas Bohlen

Stefan Jetschny

Denise De Nil

Daniel Köhn

One or more acoustic transducers are used to measure ultrasonic velocities in the mud in the interior channel of a drill collar. Corrections may be applied for temperature and/or fine grain drill cuttings to get the ultrasonic velocity in the annulus between the drill collar and the borehole wall. The latter velocity may be used for caliper measurements and for correcting measurements made by formation evaluation sensors.

Downhole measurements of mud acoustic velocity

In some embodiments, an apparatus and a system, as well as a method and an article, may include exciting a plurality of signal source pairs having a substantially equal and non-zero acoustic signature amplitude difference in a frequency domain to provide acoustic signal data, and acquiring the acoustic signal data along a selected azimuth. The plurality of signal source pairs may comprise acoustic bender plates, perhaps included in the outer wall of a downhole tool.

Controlled source imbalance apparatus, systems, and methods

A downhole acoustic logging tool is used for generating a guided borehole wave that propagates into the formation as a body wave, reflects from an interface and is converted back into a guided borehole wave. Guided borehole waves resulting from reflection of the body wave are used to image a reflector.

Imaging of formation structure ahead of the drill-bit

A system and method for determining blockage in a wellbore containing fluid and/or in a formation adjacent the wellbore, according to which energy is generated in the fluid and variables associated with the energy are measured.

System and method for monitoring and removing blockage in a downhole oil and gas recovery operation

Growing community of inventors

Houston, TX, United States of America

Tim W Geerits