Michael S Crosskno

US Patent:

6734675, May 11, 2004

Filed:

Oct 1, 2002

Appl. No.:

10/262548

Inventors:

Otto N. Fanini - Houston TX
Stanislav W. Forgang - Houston TX
Michael S. Crosskno - Deer Park TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01N 310

US Classification:

324339, 324343

Abstract:

A transverse induction logging tool having a transmitter and receiver for downhole sampling of formation properties, the tool having a symmetrical shielded split-coil transmitter coil and a bucking coil interposed between the split transmitter coils to reduce coupling of the transmitter time varying magnetic field into the receiver. The tool provides symmetrical shielding of the coils and grounding at either the transmitter or receiver end only to reduce coupling of induced currents into the received signal. The tool provides an insulator between receiver electronics and the conductive receiver housing having contact with conductive wellbore fluid, to reduce parasitic current flowing in a loop formed by the upper housing, feed through pipe, lower housing and wellbore fluid adjacent the probe housing or mandrel. An internal verification loop is provided to track changes in transmitter current in the real and quadrature component of the received data signal. A galvanic electrode is housed in the same mandrel with the induction logging receiver and transmitter.

US Patent:

7190169, Mar 13, 2007

Filed:

Jun 15, 2004

Appl. No.:

10/867620

Inventors:

Otto N. Fanini - Houston TX, US
Stanislav W. Forgang - Houston TX, US
Michael S. Crosskno - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/28

US Classification:

324339

Abstract:

The present invention improves measurement of the formation induction response in the presence of the primary magnetic field generated by a logging tool's transmitter. In a exemplary embodiment of the present invention, a structure is provided having a new combination of electrical and mechanical design features which provide logging tool for internal calibration and checking of antenna performance and characteristics before during and after well logging operations. In one aspect of the invention a logging tool is provided comprising a verification winding for coupling a verification signal into the receiver coil.

US Patent:

7199586, Apr 3, 2007

Filed:

May 7, 2004

Appl. No.:

10/841397

Inventors:

Otto N. Fanini - Houston TX, US
Stanislav W. Forgang - Houston TX, US
Michael S. Crosskno - Deer Park TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01N 3/10

US Classification:

324339, 324334

Abstract:

A transverse induction logging tool having a transmitter and receiver for downhole sampling of formation properties, the tool having a symmetrical shielded split-coil transmitter coil and a bucking coil interposed between the split transmitter coils to reduce coupling of the transmitter time varying magnetic field into the receiver. The tool provides symmetrical shielding of the coils and grounding at either the transmitter or receiver end only to reduce coupling of induced currents into the received signal. The tool provides an insulator between receiver electronics and the conductive receiver housing having contact with conductive wellbore fluid, to reduce parasitic current flowing in a loop formed by the upper housing, feed through pipe, lower housing and wellbore fluid adjacent the probe housing or mandrel. An internal verification loop is provided to track changes in transmitter current in the real and quadrature component of the received data signal. A galvanic electrode is housed in the same mandrel with the induction logging receiver and transmitter.

US Patent:

7205770, Apr 17, 2007

Filed:

Mar 8, 2006

Appl. No.:

11/371052

Inventors:

Stanislav W. Forgang - Houston TX, US
Randy Gold - Houston TX, US
Luis M. Pelegri - Humble TX, US
Michael S. Crosskno - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/28

US Classification:

324339

Abstract:

Calibration of the arrays of a multicomponent induction logging tool is achieved by positioning the tool horizontally above ground. The upper and lower housings of the tool are connected by a borehole conductivity simulator which as a resistance comparable to that of a borehole. Axial and radial positioning of the transmitter coils is done by monitoring outputs at receiver coils to achieve a minimum.

US Patent:

7319331, Jan 15, 2008

Filed:

Jan 26, 2006

Appl. No.:

11/340785

Inventors:

Luis M. Pelegri - Humble TX, US
Stanislav W. Forgang - Houston TX, US
Michael S. Crosskno - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/18
G01V 3/28

US Classification:

324339

Abstract:

Misalignment of the transmitter and receiver coils of an induction logging tool is determined by positioning the logging tool with a coil axially encompassing the transmitter coil and/or the receiver coil, and activating the transmitter at a plurality of rotational angles.

US Patent:

7408355, Aug 5, 2008

Filed:

Jan 25, 2007

Appl. No.:

11/627172

Inventors:

Stanislav W. Forgang - Houston TX, US
Randy Gold - Houston TX, US
Luis M. Pelegri - Humble TX, US
Michael S. Crosskno - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/28

US Classification:

324339

Abstract:

Calibration of the arrays of a multicomponent induction logging tool is achieved by positioning the tool horizontally above ground. The upper and lower housings of the tool are connected by a borehole conductivity simulator which as a resistance comparable to that of a borehole. Axial and radial positioning of the transmitter coils is done by monitoring outputs at receiver coils to achieve a minimum.

US Patent:

7598741, Oct 6, 2009

Filed:

Mar 13, 2007

Appl. No.:

11/685271

Inventors:

Otto N. Fanini - Houston TX, US
Stanislav W. Forgang - Houston TX, US
Michael S. Crosskno - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/18
G01V 3/28

US Classification:

324339, 324334

Abstract:

The present invention improves measurement of the formation induction response in the presence of the primary magnetic field generated by a logging tool's transmitter. A structure is provided having a new combination of electrical and mechanical design features which provide logging tool for internal calibration and checking of antenna performance and characteristics before during and after well logging operations.

US Patent:

7629792, Dec 8, 2009

Filed:

Oct 30, 2007

Appl. No.:

11/929238

Inventors:

Luis M. Pelegri - Humble TX, US
Stanislav W. Forgang - Houston TX, US
Michael S. Crosskno - Spring TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01V 3/28

US Classification:

324339

Abstract:

Misalignment of the transmitter and receiver coils of an induction logging tool is determined by positioning the logging tool with a coil axially encompassing the transmitter coil and/or the receiver coil, and activating the transmitter at a plurality of rotational angles.