David R Beard

US Patent:

7425827, Sep 16, 2008

Filed:

Sep 29, 2006

Appl. No.:

11/541227

Inventors:

Songhua Chen - Katy TX, US
Carl M. Edwards - Katy TX, US
Thomas Kruspe - Wienhausen, DE
Martin Blanz - Celle, DE
Holger F. Thern - Hannover, DE
David R. Beard - Houston TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/00

US Classification:

324303

Abstract:

The quality factor of a NMR-antenna depends upon mud conductivity, formation resistivity and the borehole size. The Q of the antenna is measured. From measurement of one of formation conductivity or borehole size, the other can be determined.

US Patent:

8030938, Oct 4, 2011

Filed:

Mar 26, 2008

Appl. No.:

12/055517

Inventors:

Alexandre N. Bespalov - Spring TX, US
David R. Beard - Houston TX, US
Randy Gold - Houston TX, US
Gregory B. Itskovich - Houston TX, US
Tsili Wang - Katy TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/18

US Classification:

324367

Abstract:

An apparatus for imaging a subsurface material traversed by a borehole, the apparatus including an imaging pad deployed by a logging instrument, the pad including a plurality of measuring sets, each measuring set including a first current injector electrode, a second current injector electrode, a pair of sensor electrodes disposed between the first current injector electrode and the second current injector electrode, and an output for coupling to an electronics unit adapted for producing the imaging of the subsurface material.

US Patent:

20200355635, Nov 12, 2020

Filed:

Jan 10, 2018

Appl. No.:

16/765360

Inventors:

- Houston TX, US
Yuesheng Cheng - Spring TX, US
David R. Beard - Houston TX, US
Arcady Reiderman - Richmond TX, US
Songhua Chen - Katy TX, US

International Classification:

G01N 24/08
G01V 3/32

Abstract:

A method and system for interspersing different wait times in trainlet and partial recovery sequences is provided. The method includes introducing a nuclear magnetic resonance (NMR) tool into a wellbore penetrating a subterranean formation. The method also includes applying an NMR pulse sequence to the subterranean formation using the NMR tool, in which the NMR pulse sequence includes at least two different wait times interspersed between successive sequences of radio frequency (RF) pulses. The method also includes measuring one or more echo signals corresponding to a substance in the subterranean formation based on the applied NMR pulse sequence. The method also includes determining a distribution of a characteristic of the substance based on the measured one or more echo signals.