John A Michaels

US Patent:

6478096, Nov 12, 2002

Filed:

Jul 21, 2000

Appl. No.:

09/621398

Inventors:

Stanley C. Jones - Littleton CO
John M. Michaels - Houston TX
Jaedong Lee - Houston TX
Matthias Meister - Celle, DE
Volker Krueger - Celle, DE

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 4910

US Classification:

175 50, 16625001, 7315218

Abstract:

A minimum volume apparatus and method is provided including a tool for obtaining at least one parameter of interest of a subterranean formation in-situ, the tool comprising a carrier member, a selectively extendable member mounted on the carrier for isolating a portion of annulus, a port exposable to formation fluid in the isolated annulus space, a piston integrally disposed within the extendable member for urging the fluid into the port, and a sensor operatively associated with the port for detecting at least one parameter of interest of the fluid.

US Patent:

6581455, Jun 24, 2003

Filed:

Nov 1, 2000

Appl. No.:

09/703645

Inventors:

Per-Erik Berger - Sokn, NO
Volker Krueger - Celle, DE
Matthias Meister - Celle, DE
John M. Michaels - Houston TX
Jaedong Lee - Houston TX

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 4708

US Classification:

7315255, 702 9, 175 50

Abstract:

An apparatus and method for obtaining samples of pristine formation or; formation fluid, using a work string designed for performing other downhole work such as drilling, workover operations, or re-entry operations. An extendable element extends against the formation wall to obtain the pristine formation or fluid sample. The apparatus includes at least one extendable gripper element for anchoring the apparatus during testing and sampling operations.

US Patent:

6585045, Jul 1, 2003

Filed:

Aug 15, 2001

Appl. No.:

09/930618

Inventors:

Jaedong Lee - Houston TX
John M. Michaels - Houston TX
Volker Krueger - Celle, DE
Matthias Meister - Celle, DE
Per-Erik Berger - Vestre Amoy, NO

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 4700

US Classification:

1662525, 16625002, 16625017, 16625001, 166100, 175 50

Abstract:

An apparatus and method for determining permeability of a subterranean formation is provided. The apparatus and method comprise a work string, at least one selectively extendable member mounted on the work string to isolate a portion of the annular space between the work string and borehole. A predetermined distance proportional to the radius of a control port separates at least two ports in the work string. A sensor operatively associated with each port is mounted in the work string for measuring at least one characteristic such as pressure of the fluid in the isolated section.

US Patent:

6609568, Aug 26, 2003

Filed:

Jul 20, 2001

Appl. No.:

09/910209

Inventors:

Volker Krueger - Celle, DE
Matthias Meister - Celle, DE
John M. Michaels - Houston TX
Jaedong Lee - Houston TX
Stanley C. Jones - Littleton CO

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 4910

US Classification:

16625007, 16625017, 166 66

Abstract:

An apparatus and method capable of incrementally decreasing the borehole pressure at a variable rate by controlling a test volume within the borehole. The system includes an incrementally controllable pump, closed loop feedback and a controller for drawing down the pressure of a test volume to a level just below formation pressure. This incremental drawdown system will significantly reduce the overall measurement time, thereby increasing drilling efficiency and safety.

US Patent:

6640908, Nov 4, 2003

Filed:

Aug 7, 2002

Appl. No.:

10/213865

Inventors:

Stanley C. Jones - Littleton CO
John M. Michaels - Houston TX
Jaedong Lee - Houston TX
Matthias Meister - Celle, DE
Volker Krueger - Celle, DE

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 4910

US Classification:

175 50, 16625001, 7315218

Abstract:

A minimum volume apparatus and method is provided including a tool for obtaining at least one parameter of interest of a subterranean formation in-situ, the tool comprising a carrier member, a selectively extendable member mounted on the carrier for isolating a portion of annulus, a port exposable to formation fluid in the isolated annulus space, a piston integrally disposed within the extendable member for urging the fluid into the port, and a sensor operatively associated with the port for detecting at least one parameter of interest of the fluid.

US Patent:

7246664, Jul 24, 2007

Filed:

Sep 12, 2002

Appl. No.:

10/242112

Inventors:

Houman M. Shammai - Houston TX, US
John M. Michaels - Cypress TX, US
Michael J. Moody - Katy TX, US
Phillip Wills - Aberdeenshire, GB

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 49/08

US Classification:

166264, 166100

Abstract:

A method and apparatus for maintaining the single phase integrity of a deep well formation sample that is removed to the surface comprises a vacuum jacket insulated single working cylinder divided by two free pistons into three variable volume chambers. The intermediate chamber is pre-charged with a fixed quantity of high pressure gas. Wellbore fluid freely admitted to one end chamber bears against one free piston to further compress the gas. The formation sample is pumped into the other end chamber to first, displace the wellbore fluid from the first end chamber and, sequentially, to further compress the gas to preserve the sample phase state upon removal to the surface.

US Patent:

7346460, Mar 18, 2008

Filed:

Jun 21, 2004

Appl. No.:

10/872713

Inventors:

Rocco DiFoggio - Houston TX, US
John M. Michaels - Cypress TX, US
Jaedong Lee - Houston TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

G01F 17/00
E21B 49/08

US Classification:

702 50, 7315227

Abstract:

The present invention provides an objective bubble point pressure determination method enables new applications of downhole PV (Pressure Volume) test results such as in situ measurement of the bubble point pressure for use as a quality control parameter for sampling. The present invention provides a method and apparatus to fit data points to a curve and to smooth these points over an interval of N points. The derivative of the curve is determined to obtain peak acceleration. The peak acceleration represents the bubble point pressure. This bubble point pressure is verified by comparison to changes in fluid compressibility and visual observation of a pressure volume plot history.

US Patent:

7621325, Nov 24, 2009

Filed:

Jan 29, 2007

Appl. No.:

11/668385

Inventors:

Houman M. Shammai - Houston TX, US
John M. Michaels - Cypress TX, US
James T. Cernosek - Missouri City TX, US
Michael J. Moody - Katy TX, US
Phillip Wills - Aberdeenshire, GB

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 49/10

US Classification:

166264, 166100

Abstract:

A method and apparatus for maintaining the single phase integrity of a deep well formation sample that is removed to the surface comprises a vacuum jacket insulated single working cylinder divided by two free pistons into three variable volume chambers. The intermediate chamber is pre-charged with a fixed quantity of high pressure gas. Wellbore fluid freely admitted to one end chamber bears against one free piston to further compress the gas. The formation sample is pumped into the other end chamber to first, displace the wellbore fluid from the first end chamber and, sequentially, to further compress the gas to preserve the sample phase state upon removal to the surface.