| 6995352 |
Fiber optic based method and system for determining and controlling position of a sliding sleeve valve |
Robert Robinson, Peter C. Ogle |
2006-02-07 |
| 6401840 |
Method of extracting and testing a core from a subterranean formation |
Mike H. Johnson, Volker Krueger |
2002-06-11 |
| 6305227 |
Sensing systems using quartz sensors and fiber optics |
Jian-Qun Wu, Kevin Didden, Alan D. Kersey, Phillip E. Pruett |
2001-10-23 |
| 6279660 |
Apparatus for optimizing production of multi-phase fluid |
— |
2001-08-28 |
| 6278811 |
Fiber optic bragg grating pressure sensor |
Alan D. Kersey, Robert J. Maron, Phillip E. Pruett, Mark R. Fernald, Guy A. Daigle +4 more |
2001-08-21 |
| 6271766 |
Distributed selectable latent fiber optic sensors |
F. Kevin Didden |
2001-08-07 |
| 6227114 |
Select trigger and detonation system using an optical fiber |
Jian-Qun Wu, Alan D. Kersey, James Dunphy |
2001-05-08 |
| 6191414 |
Composite form as a component for a pressure transducer |
Peter C. Ogle, Alan D. Kersey |
2001-02-20 |
| 6148933 |
Steering device for bottomhole drilling assemblies |
Mike H. Johnson, Volker Krueger |
2000-11-21 |
| 6009216 |
Coiled tubing sensor system for delivery of distributed multiplexed sensors |
Phillip E. Pruett, Guy A. Daigle |
1999-12-28 |
| 5986749 |
Fiber optic sensing system |
Jian-Qun Wu, Alan D. Kersey |
1999-11-16 |
| 5973317 |
Washer having fiber optic Bragg Grating sensors for sensing a shoulder load between components in a drill string |
— |
1999-10-26 |
| 5957221 |
Downhole core sampling and testing apparatus |
Mike H. Johnson, Volker Krueger |
1999-09-28 |
| 5945665 |
Bolt, stud or fastener having an embedded fiber optic Bragg Grating sensor for sensing tensioning strain |
— |
1999-08-31 |
| 5925879 |
Oil and gas well packer having fiber optic Bragg Grating sensors for downhole insitu inflation monitoring |
— |
1999-07-20 |
| 5877426 |
Bourdon tube pressure gauge with integral optical strain sensors for measuring tension or compressive strain |
Robert J. Maron, James Dunphy, Phillip E. Pruett |
1999-03-02 |
| 5163029 |
Method for detection of influx gas into a marine riser of an oil or gas rig |
Thomas M. Bryant, Donald S. Grosso |
1992-11-10 |