Baker Hughes Corporation

Baker Hughes, a Ge Compnay, LLC

Jens-Uwe Bruns

Wojciech Emmerich

Hanno Reckmann

Andreas Hohl

Christian Herbig

Oliver Hoehn

Ingo Forstner

Hatem Oueslati

Christian Linke

Volker Krueger

Sven Krueger

Karsten Fuhst

Feng Zheng

Christian Hansen

Joerg Breitenfeld

Sanam Moghaddamnia

Imed Ben Brahim

An embodiment of a method of detecting and correcting for spiraling in a downhole carrier includes: deploying the carrier in a borehole in an earth formation as part of a subterranean operation; acquiring time based data from at least one sensor disposed at the carrier; acquiring time and depth data, the time and depth data correlating time values with depths of the carrier; generating a depth based profile based on the time based data and the time and depth data; generating a frequency profile by transforming the depth based profile into the frequency domain; detecting a spiraling event based on an amplitude of the frequency profile; and taking corrective action based on detecting the spiraling event.

Automated spiraling detection

In one aspect, an apparatus for drilling a wellbore into an earth formation is disclosed, which apparatus, according to one embodiment, may include a drill string configured to be conveyed into a wellbore, wherein an annulus is formed between the drill string and a wellbore wall, a first flow device configured to circulate a first fluid from an annulus to a bore of the drill string, and a second flow device positioned downhole of the first flow device, the second flow device configured to circulate a second fluid from the bore of the drill string to the annulus.

Reverse circulation apparatus and methods of using same

A method for reducing interference in a received downhole telemetry signal includes: segmenting a received signal; windowing each signal segment; transforming each windowed signal segment into a complex variable domain to generate a plurality of complex variable domain segments with an in-phase component vector I and a quadrature component vector Q; calculating a real amplitude vector A from the I and the Q vectors; filtering interferers in the amplitude vector A for each complex variable domain segment to generate a filtered amplitude vector &#xc3;; recalculating an amplitude of the amplitude vector A using the filtered amplitude vector &#xc3; to generate an output amplitude vector &#xc2;; scaling the I and the Q vectors by a factor &#xc2;/A to generate an output in-phase component vector I' and an output quadrature component vector Q&#x2032;; and transforming I&#x2032; and Q&#x2032; into the time domain to provide an interference-reduced output signal in the time domain.

Interference reduction method for downhole telemetry systems

Growing community of inventors

Burgdorf, Germany

Jens-Uwe Bruns