Evan L. Davies - Spring TX, US Luis E. San Martin - Houston TX, US
Assignee:
Halliburton Energy Services, Inc. - Houston TX
International Classification:
H01F 27/30
US Classification:
336198
Abstract:
The present invention is directed to a logging tool induction coil form having a coating layer, which is easy to form to tight tolerances, bonded to at least a portion of the outer surface of the ceramic hollow cylindrical core. A plurality of parallel circumferential grooves are machined into the coating layer. Since the coating material is easy to machine, the parallel circumferential grooves can be machined to the tight tolerances needed in logging applications at a fraction of the time and cost of machining ceramic-only forms.
Method For Construction Of Low Thermal Expansion And Low Resistance Wire For Logging Applications
Luis E. San Martin - Houston TX, US Evan L. Davies - Spring TX, US
Assignee:
Halliburton Energy Services, Inc. - Houston TX
International Classification:
E21B 19/084 H01B 1/02
US Classification:
166385, 166 651, 1662422
Abstract:
In some embodiments, a device includes a downhole tool comprising a wire comprising at least one strand comprising a low thermal expansion material. The low thermal expansion material may have a low electrical resistance material disposed thereon.
Standoff Compensation For Imaging In Oil-Based Muds
Luis E. San Martin - Houston TX, US Humberto E. Rosa - Houston TX, US Raj Pai - Houston TX, US William J. Schaecher - Houston TX, US Myrick L. Monroe - Katy TX, US Marian L. Morys - Downington PA, US Carl Dodge - Houston TX, US
Assignee:
Halliburton Energy Services, Inc. - Houston TX
International Classification:
G01V 3/20 G01V 3/24
US Classification:
324366, 324370
Abstract:
Oil-based mud imaging systems and methods having standoff compensation. In some embodiments, disclosed logging systems include a logging tool in communication with surface computing facilities. The logging tool is provided with a sensor array having at least two voltage electrodes positioned between two current electrodes energized by an excitation source to create an oscillatory electric field in a borehole wall. The two current electrodes are each shielded with conductive shields to prevent current leakage into the logging tool body. A common mode voltage is measured, and the phase and amplitude of the excitation source is controlled to reduce the difference between the common mode voltage and reference voltage of a voltage detector. The logging tool is further provided with electronics coupled to the voltage detector and the current electrodes to determine a differential voltage between the voltage electrodes and two current flows from separate ones of the current electrodes. From the differential voltage and multiple current flows, the computing facilities determine borehole wall resistivity, and may display the resistivity as a borehole wall image.
Dingding Chen - Plano TX, US Luis E. San Martin - Houston TX, US Gulamabbas A. Merchant - Houston TX, US Robert W. Strickland - Austin TX, US Martin T. Hagan - Stillwater OK, US
An artificial neural network, ANN, and method of training the ANN for inversion of logging tool signals into well logs of formation parameters is disclosed. Properly selected synthetic models of earth formations are used to train the ANN. The models include Oklahoma and chirp type of formations. In each model parameter contrasts of from 10 to 1 to about 100 to 1 are included. Models including maximum and minimum parameter values spanning the operating range of the selected logging tool are included. Parameter contrasts at interfaces are limited to realistic values found in earth formations. The selected models are used to generate synthetic tool signals, which are then used as inputs to the ANN for training. When the ANN coefficients are properly adjusted to produce an output matching the original models, the ANN can be used for inversion of any real signals from the selected logging tool.
Method For Construction Of Low Thermal Expansion And Low Resistance Wire For Logging Applications
Luis E. San Martin - Houston TX, US Evan L. Davies - Spring TX, US
Assignee:
Halliburton Energy Services, Inc. - Houston TX
International Classification:
E21B 19/084 H01B 1/02
US Classification:
166385, 166 651, 1662422, 175 57, 175 90
Abstract:
A device is provided, the device comprising a downhole tool comprising a wire comprising at least one strand comprising a low thermal expansion material. The low thermal expansion material may have a low electrical resistance material disposed thereon.
Permittivity Measurements With Oil-Based Mud Imaging Tool
Luis E. San Martin - Houston TX, US William J. Schaecher - Houston TX, US Myrick L. Monroe - Katy TX, US
Assignee:
Halliburton Energy Services, Inc. - Houston TX
International Classification:
G01V 3/24 G01V 3/20
US Classification:
324366, 324355, 324347
Abstract:
Oil-based mud imaging systems and methods that measure formation permittivity. In some embodiments, disclosed logging systems include a logging tool in communication with surface computing facilities. The logging tool is provided with a sensor array having at least two voltage electrodes positioned between at least two current electrodes that create an electric field in a borehole wall, and is further provided with electronics coupled to the voltage electrodes to determine a differential voltage magnitude and phase. From the magnitude and phase, formation resistivity and permittivity measurements can be determined and used to construct a borehole wall image.
Virtual Steering Of Induction Tool Attenuation And Phase Difference Measurements
An apparatus and method that provide steerable measurements of attenuation and phase difference are disclosed. In a preferred embodiment, a logging tool is provided with two triads of orthogonal receivers and a triad of orthogonal transmitters. A controller in the logging tool fires selected transmitters singly and in pairs, and determines measurements of ratios between signals received by the receiver triads. The measurement of sixteen ratios is sufficient to allow determination of attenuation and phase difference that would be measured by virtually steered receivers according to equations provided herein.
Luis E. San Martin - Houston TX, US Evan L. Davies - Spring TX, US
Assignee:
Halliburton Energy Services, Inc. - Houston TX
International Classification:
G01V 3/00
US Classification:
324366, 324303, 324347, 324355, 324367
Abstract:
An apparatus and method for performing high transverse resolution voltage measurements in downhole logging tools utilized to determine the resistivity of an adjacent portion of a borehole wall. Two current electrodes and are energized by an excitation source to create an oscillatory electric field in a borehole wall. The voltage drop from each voltage electrode in a row of laterally spaced voltage electrodes is measured relative to a shared voltage electrode longitudinally spaced from the row of electrodes. The differential voltage is used in combination with a measured current flow to determine a resistivity value for the borehole. A second row of laterally spaced voltage electrodes having electrodes laterally offset from the electrodes of the first row is included to provide high transverse resolution. A common mode voltage at the shared voltage electrodes is measured and utilized to minimize the resistivity measurement error.
San Luis Ftbol Club, known more commonly as San Luis or San Luis Potos, is a Mexican professional football club from the city of San Luis Potos, Mexico. ...
Flickr
Youtube
Texas Tornados , Soy de San Luis, on Nashvill...
This video is dedicated to Evangelina "Vangie" Huerta and Freddy Fende...
Category:
Music
Uploaded:
28 Aug, 2008
Duration:
5m 12s
The SLO Experiment
By Robert Weber, this experimental tilt-shift video was shot and edite...
Category:
Entertainment
Uploaded:
17 Dec, 2010
Duration:
2m 54s
2010 FIA GT1 World Championship at San Luis R...
The start and opening laps of the final race from the 2010 FIA GT1 Wor...
Category:
Autos & Vehicles
Uploaded:
05 Dec, 2010
Duration:
4m 42s
San Luis vs Queretaro 3-2 Jornada 12 Apertura...
San Luis vs Queretaro 3-2 Jornada 12 Apertura 2010 [16/10/10]
Category:
Sports
Uploaded:
17 Oct, 2010
Duration:
6m 31s
San Luis vs San Martin 3-1 Copa Libertadores ...
chicharitofan88.... SAN LUIS POTOS (AP) -- Michael Arroyo anot dos go...
Category:
Sports
Uploaded:
23 Mar, 2011
Duration:
4m 20s
San Luis vs Gayinas amargas
*****AWANTE SAN LU12***** *****AWANTE LG***** *****REX*****