Kenneth R Stephenson

Address:

13818 Keyworth Dr, Houston, TX 77014

Phone:

2818725051

VIN:

1GCEC19027Z516596

Make:

CHEVROLET

Model:

SILVERADO 1500

Year:

2007

US Patent:

20120138782, Jun 7, 2012

Filed:

Dec 3, 2010

Appl. No.:

12/959485

Inventors:

Matthieu Simon - Houston TX, US
Peter Wraight - Skillman NJ, US
Christian Stoller - Princeton Junction NJ, US
Kenneth E. Stephenson - Princeton NJ, US
Andrew Bazarko - Princeton NJ, US

International Classification:

G01V 5/12

US Classification:

250254

Abstract:

Logging-while-drilling tools incorporating an electronic radiation generator, such as an electronic X-ray generator, and a method for using the same are provided. One example of such a logging-while-drilling tool may include a circumferential drill collar, a chassis disposed radially interior to the drill collar, and an electronic X-ray generator and an X-ray detector disposed within the chassis. The electronic X-ray generator may emit X-rays out of the logging-while-drilling tool into a subterranean formation. The X-ray detector may detect X-rays that return to the logging-while-drilling tool after scattering in the subterranean formation, which may be used to determine a density and/or a lithology of the subterranean formation.

US Patent:

20170146684, May 25, 2017

Filed:

Feb 2, 2017

Appl. No.:

15/422782

Inventors:

- Sugar Land TX, US
Michael Lynn Evans - Missouri City TX, US
Kenneth Edward Stephenson - New Castle VA, US

International Classification:

G01V 5/10

Abstract:

Systems, methods, and devices for determining a neutron-gamma density (NGD) measurement of a subterranean formation that is accurate in both liquid- and gas-filled formations are provided. For example, a downhole tool for obtaining such an NGD measurement may include a neutron generator, a neutron detector, two gamma-ray detectors, and data processing circuitry. The neutron generator may emit neutrons into a formation, causing a fast neutron cloud to form. The neutron detector may detect a count of neutrons representing the extent of the neutron cloud. The gamma-ray detectors may detect counts of inelastic gamma-rays caused by neutrons that inelastically scatter off the formation. Since the extent of the fast neutron cloud may vary depending on whether the formation is liquid- or gas-filled, the data processing circuitry may determine the density of the formation based at least in part on the counts of inelastic gamma-rays normalized to the count of neutrons.

US Patent:

20140332678, Nov 13, 2014

Filed:

Nov 9, 2011

Appl. No.:

13/884863

Inventors:

Avto Tkabladze - Sugar Land TX, US
Michael Evans - Missouri City TX, US
Kenneth Stephenson - Plainsboro NJ, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G01V 5/10

US Classification:

2502692

Abstract:

Systems, methods, and devices for determining neutron-gamma density (NGD) measurement of a subterranean formation that is accurate in both liquid- and gas-filled formations are provided. For example, a downhole tool for obtaining such an NGD measurement may include a neutron generator, neutron detector, two gamma-ray detectors, and data processing circuitry. Neutron generator may emit neutrons into a formation, causing a fast neutron cloud to form. Neutron detector may detect a count of neutrons representing the extent of the neutron cloud. Gamma-ray detectors may detect counts of inelastic gamma-rays caused by neutrons that inelastically scatter off the formation. Since the extent of the fast neutron cloud may vary depending on whether the formation is liquid- or gas-filled, data processing circuitry may determine the density of the formation based at least in part on the counts of inelastic gamma-rays normalized to the count of neutrons.