| 9267370 |
Method and apparatus for initialization of a tool via a remote reference source |
John Lionel Weston, Eric Wright, Roger Ekseth |
2016-02-23 |
| 8374793 |
Reducing error contributions to gyroscopic measurements from a wellbore survey system |
Roger Ekseth, John Lionel Weston |
2013-02-12 |
| 8294592 |
Method and apparatus for initialization of a wellbore survey tool via a remote reference source |
John Lionel Weston, Eric Wright, Roger Ekseth |
2012-10-23 |
| 8065087 |
Reducing error contributions to gyroscopic measurements from a wellbore survey system |
Roger Ekseth, John Lionel Weston |
2011-11-22 |
| 7363717 |
System and method for using rotation sensors within a borehole |
Roger Ekseth |
2008-04-29 |
| 7225550 |
System and method for using microgyros to measure the orientation of a survey tool within a borehole |
Roger Ekseth |
2007-06-05 |
| 7117605 |
System and method for using microgyros to measure the orientation of a survey tool within a borehole |
Roger Ekseth |
2006-10-10 |
| 6631563 |
Survey apparatus and methods for directional wellbore surveying |
James Brosnahan, Greg Neubauer, Eric Wright |
2003-10-14 |
| 6588116 |
Method for drilling under rivers and other obstacles |
Tim Dallas, Eric Wright, Greg Neubauer, James Brosnahan |
2003-07-08 |
| 5821414 |
Survey apparatus and methods for directional wellbore wireline surveying |
Koen Antoine Noy, Eric Wright, James Brosnahan, Han Wei, Greg Neubauer |
1998-10-13 |
| 5806195 |
Rate gyro wells survey system including nulling system |
James Brosnahan, Eric Wright, Greg Neubauer |
1998-09-15 |
| 5657547 |
Rate gyro wells survey system including nulling system |
James Brosnahan, Eric Wright, Greg Neubauer |
1997-08-19 |
| 4800981 |
Stabilized reference geophone system for use in downhole environment |
Danny E. Hoover, Stephen Klopp |
1989-01-31 |