Christopher F Conrad

US Patent:

20150293195, Oct 15, 2015

Filed:

Dec 14, 2012

Appl. No.:

14/432441

Inventors:

- Houston TX, US
Jie Yang - Paoli PA, US
Christopher Jon Conrad - Glen Mills PA, US

Assignee:

Halliburton Energy Services, Inc. - Houston TX

International Classification:

G01R 33/50
G01V 3/32
G01R 33/54

Abstract:

Various embodiments include apparatus and methods to conduct measurements on a structure using a nuclear magnetic resonance tool. The nuclear magnetic resonance tool can be operated to make nuclear magnetic resonance measurements that generate transverse 5 relaxation time echo train sequences ending with a recovery pulse. Additional apparatus, systems, and methods are disclosed.

US Patent:

20140117984, May 1, 2014

Filed:

Jun 7, 2011

Appl. No.:

14/123295

Inventors:

Christopher J. Conrad - Glen Mills PA, US
Rebecca C. Jachmann - Houston TX, US

Assignee:

HALLIBURTON ENERGY SERVICES, INC. - Houston TX

International Classification:

G01V 3/32

US Classification:

324303

Abstract:

A nuclear magnetic resonance (NMR) logging tool assembly method that employs rotational indexing to optimize the sensing volume. At least some embodiments include establishing an initial arrangement of the permanent magnets and marking each magnet to indicate their relative rotational orientations in the initial arrangement. Thereafter a series of magnetic field measurements and individual magnet rotations are performed to improve uniformity of the magnetic field in the sensing volume. Once a satisfactory arrangement has been found, the magnets may be secured together and an antenna array installed along with the electronics for performing relaxation time measurements and providing logs of formation properties that can be derived therefrom, such as porosity, permeability, density, rock type, fluid type, etc. The tool may be packaged as a wireline sonde, a tubing-conveyed logging tool, or a logging while drilling (LWD) tool.