Rebecca Jachmann

Miniature Nmr Drill Cutting Analyzer And Methods Of Use

Application

#2014031 Oct 23, 2014

Filed

Mar 1, 2013

Inventor

Rebecca Corina Jachmann (Kingwood, TX)

Appl. No.

14/233083

Assignee

Halliburton Energy Services, Inc. (Houston, TX)

International Classification

G01R 33/30

U.S. Classification

324321

Abstract

A nuclear magnetic resonance (NMR) sample analyzer has a plurality of NMR units arrayed in a predetermined relationship to each other. Each of the NMR units includes a sample chamber having a sensitive volume for containing a sample to be analyzed; a radio frequency (RF) transmitting and receiving device proximal the sample chamber; and a magnet surrounding the RF transmitting and receiving device and sample chamber for generating a substantially uniform magnetic field within the sensitive volume and substantially no magnetic field beyond an outside wall of the magnet.

Methods To Image Acoustic Sources In Wellbores

Application

#2017026 Sep 21, 2017

Filed

Aug 11, 2016

Inventor

Yinghui Lu (The Woodlands, TX) · Rebecca Jachmann (Spring, TX) · Nam Nguyen (Singapore, SG) · Yi Yang Ang (Singapore, SG)

Appl. No.

15/319974

Assignee

Halliburton Energy Services, Inc. (Houston, TX)

International Classification

G01V 1/28, E21B 47/14, G01V 1/40, E21B 47/10

Abstract

A method including selecting a forward model based on a modeled well structure and including a single modeled acoustic source located in a modeled wellbore and a plurality of modeled acoustic sensors located in a modeled source area, simulating an acoustic signal generated by the single modeled acoustic source and received by each modeled acoustic sensor, calculating phases of the simulated acoustic signals received at each modeled acoustic sensor, obtaining with a principle of reciprocity a plurality of modeled acoustic sources in the modeled source area and a single modeled acoustic sensor in the modeled wellbore, calculating phase delays of the simulated acoustic signals between each modeled acoustic source and the single modeled acoustic sensor, detecting acoustic signals generated by a flow of fluid using acoustic sensors in a wellbore, and processing the acoustic signals using the phase delays to generate a flow likelihood map.

Frequency Weighting In Broadband Acoustic Beamforming

Application

#2018035 Dec 13, 2018

Filed

Jul 12, 2016

Inventor

Yi Yang Ang (Singapore, SG) · Rebecca Corina Jachmann (Spring, TX) · Yinghui Lu (The Woodlands, TX) · Avinash Vinayak Taware (San Jose, CA)

Appl. No.

15/781923

Assignee

Yi Yang Ang (Singapore, SG) · Rebecca Corina Jachmann (Spring, TX) · Yinghui Lu (The Woodlands, TX) · Avinash Vinayak Taware (San Jose, CA)

International Classification

E21B 47/10, G01V 1/40

Abstract

Disclosed are systems and methods for processing broadband acoustic signals acquired by a plurality of acoustic sensors, using an array-signal-processing technique to compute fused-signal maps in the frequency domain for a plurality of frequency bins. In accordance with various embodiments, the fused-signal maps are combined across the frequency bins, with respective weightings that are based on eigenvalues of covariance matrices computed for the plurality of frequency bins. The combined maps can be used to locate an acoustic source in a wellbore.

Downhole Adaptive Data Compression And Formatting

Application

#2021015 May 27, 2021

Filed

Nov 21, 2019

Inventor

Rebecca Corina Jachmann (Spring, TX) · You Wang (Austin, TX)

Appl. No.

16/691066

Assignee

Halliburton Energy Services, Inc. (Houston, TX)

International Classification

G01V 3/32, G01V 3/34, G01V 3/38

Abstract

Data is received downhole from a downhole logging tool to produce received data. The received data is processed to produce processed data. A binary formatting option is selected from a group of binary formatting options, wherein applying the selected binary formatting option to the processed data produces fewer bits than applying any other binary formatting option of the group of binary formatting options to the processed data. The selected binary formatting option is applied to the processed data to produce binary data. The binary data is transmitted uphole. The binary data is received uphole. The received binary data is decompressed to produce uncompressed data. The uncompressed data is processed uphole.

Rotational Indexing To Optimize Sensing Volume Of A Nuclear Magnetic Resonance Logging Tool

Application

#2014011 May 1, 2014

Filed

Jun 7, 2011

Inventor

Christopher J. Conrad (Glen Mills, PA) · Rebecca C. Jachmann (Houston, TX)

Appl. No.

14/123295

Assignee

HALLIBURTON ENERGY SERVICES, INC. (Houston, TX)

International Classification

G01V 3/32

U.S. 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.

Tool Casing Detection

Application

#2016024 Aug 25, 2016

Filed

Jul 29, 2013

Inventor

Rebecca Corina Jachmann (Kingwood, TX) · Songhua Chen (Katy, TX)

Appl. No.

14/387485

Assignee

Rebecca Corina Jachmann (Kingwood, TX) · Songhua Chen (Katy, TX)

International Classification

G01N 24/08, G01V 3/38, G01V 3/32

Abstract

Various embodiments include apparatus and methods to conduct testing related to the disposition of measuring tools downhole in a borehole, where the measuring tools are deployed to perform testing to evaluate properties of regions in the borehole. A plurality of test analyses on data collected from operating a measuring device of a measuring tool in the borehole can be used to determine whether the measuring device is in casing or out of casing. Additional apparatus, systems, and methods are disclosed.