Issued Patents All Time
Showing 51–75 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6732052 | Method and apparatus for prediction control in drilling dynamics using neural networks | Robert MacDonald, Vladimir Dubinsky, John D. Macpherson, Dmitriy Dashevskiy | 2004-05-04 |
| 6640908 | Apparatus and method for formation testing while drilling with minimum system volume | Stanley C. Jones, John M. Michaels, Jaedong Lee, Matthias Meister | 2003-11-04 |
| 6637524 | Non-rotating sensor assembly for measurement-while-drilling applications | Thomas Kruspe | 2003-10-28 |
| 6626254 | Drilling assembly with a steering device for coiled-tubing operations | Thomas Kruspe, Carsten Freyer, Hans Jurgen Faber | 2003-09-30 |
| 6609568 | Closed-loop drawdown apparatus and method for in-situ analysis of formation fluids | Matthias Meister, John M. Michaels, Jaedong Lee, Stanley C. Jones | 2003-08-26 |
| 6609579 | Drilling assembly with a steering device for coiled-tubing operations | Thomas Kruspe, Carsten Freyer, Hans Jurgen Faber | 2003-08-26 |
| 6585045 | Formation testing while drilling apparatus with axially and spirally mounted ports | Jaedong Lee, John M. Michaels, Matthias Meister, Per-Erik Berger | 2003-07-01 |
| 6581455 | Modified formation testing apparatus with borehole grippers and method of formation testing | Per-Erik Berger, Matthias Meister, John M. Michaels, Jaedong Lee | 2003-06-24 |
| 6543132 | Methods of making mud motors | Thorsten Regener, Markus Walterskoetter | 2003-04-08 |
| 6540032 | Apparatus for transferring electrical energy between rotating and non-rotating members of downhole tools | — | 2003-04-01 |
| 6516898 | Continuous wellbore drilling system with stationary sensor measurements | — | 2003-02-11 |
| 6513606 | Self-controlled directional drilling systems and methods | — | 2003-02-04 |
| 6478096 | Apparatus and method for formation testing while drilling with minimum system volume | Stanley C. Jones, John M. Michaels, Jaedong Lee, Matthias Meister | 2002-11-12 |
| 6446736 | Non-rotating sensor assembly for measurement-while-drilling applications | Thomas Kruspe | 2002-09-10 |
| 6427783 | Steerable modular drilling assembly | Hans H. Rehbock, Thomas Kruspe, Johannes Witte, Detlef Ragnitz | 2002-08-06 |
| 6427530 | Apparatus and method for formation testing while drilling using combined absolute and differential pressure measurement | Matthias Meister, Per-Erik Berger | 2002-08-06 |
| 6429653 | Method and apparatus for protecting a sensor in a drill collar | Thomas Kruspe, Robert Slade | 2002-08-06 |
| 6401840 | Method of extracting and testing a core from a subterranean formation | Arthur D. Hay, Mike H. Johnson | 2002-06-11 |
| 6289998 | Downhole tool including pressure intensifier for drilling wellbores | Thomas Kruspe | 2001-09-18 |
| 6247542 | Non-rotating sensor assembly for measurement-while-drilling applications | Thomas Kruspe | 2001-06-19 |
| 6206108 | Drilling system with integrated bottom hole assembly | Robert MacDonald, Hatem Nasr, John W. Harrell, Roger Fincher | 2001-03-27 |
| 6176323 | Drilling systems with sensors for determining properties of drilling fluid downhole | John B. Weirich, Ronald G. Bland, William Smith, John W. Harrell, Hatem Nasr +1 more | 2001-01-23 |
| 6148933 | Steering device for bottomhole drilling assemblies | Arthur D. Hay, Mike H. Johnson | 2000-11-21 |
| 6059051 | Integrated directional under-reamer and stabilizer | Donald Jewkes | 2000-05-09 |
| 5957221 | Downhole core sampling and testing apparatus | Arthur D. Hay, Mike H. Johnson | 1999-09-28 |