| 7919965 |
Source arrangement and method for generating electromagnetic wavefields |
Tor Schaug-Pettersen, Svein Ellingsrud, Jan-Aage Langeland |
2011-04-05 |
| 7567084 |
Method and apparatus for determining the nature of submarine reservoirs |
Hans Pedersen, Svein Ellingsrud, Anders Farestveit, Stale Johansen |
2009-07-28 |
| 7202669 |
Method and apparatus for determining the nature of subterranean reservoirs |
Svein Ellingsrud, Hans Pedersen, Tor Schaug-Pettersen |
2007-04-10 |
| 7145341 |
Method and apparatus for recovering hydrocarbons from subterranean reservoirs |
Svein Ellingsrud, Fan-Nian Kong, Harald Westerdahl |
2006-12-05 |
| 7038456 |
Method and apparatus for determining the nature of subterranean reservoirs |
Svein Ellingsrud, Tor Schaug-Pettersen |
2006-05-02 |
| 7026819 |
Electromagnetic surveying for mapping the content of subterranean reservoirs |
Svein Ellingsrud, Fan-Nian Kong, Harald Westerdahl, Stale Johansen |
2006-04-11 |
| 6900639 |
Electromagnetic method and apparatus for determining the nature of subterranean reservoirs using refracted electromagnetic waves |
Svein Ellingsrud, Harald Westerdahl, Fan-Nian Kong |
2005-05-31 |
| 6864684 |
Electromagnetic methods and apparatus for determining the content of subterranean reservoirs |
Svein Ellingsrud, Harald Westerdahl, Fan-Nian Kong |
2005-03-08 |
| 6859038 |
Method and apparatus for determining the nature of subterranean reservoirs using refracted electromagnetic waves |
Svein Ellingsrud, Fan-Nian Kong, Harald Westerdahl |
2005-02-22 |
| 6717411 |
Electromagnetic method and apparatus for determining the nature of subterranean reservoirs using refracted electromagnetic waves |
Svein Ellingsrud, Harald Westerdahl, Fan-Nian Kong |
2004-04-06 |
| 6714153 |
Device for electromagnetic detection of geological properties in a well |
Fan-Nian Kong, Svein Ellingsrud, Vidar Sten-Halvorsen, Einar Stølen, Harald Westerdahl |
2004-03-30 |
| 6696839 |
Electromagnetic methods and apparatus for determining the content of subterranean reservoirs |
Svein Ellingsrud, Harald Westerdahl, Fan-Nian Kong |
2004-02-24 |
| 6628119 |
Method and apparatus for determining the content of subterranean reservoirs |
Svein Ellingsrud, Fan-Nian Kong, Harald Westerdahl, Stale Johansen |
2003-09-30 |
| 6556014 |
Device and method for measurement by guided waves on a metal string in a well |
Fan-Nian Kong, Harald Westerdahl, Svein Ellingsrud |
2003-04-29 |
| 6525540 |
Method and device for detection of em waves in a well |
Fan-Nian Kong, Harald Westerdahl, Svein Ellingsrud |
2003-02-25 |
| 6480000 |
Device and method for measurement of resistivity outside of a wellpipe |
Fan-Nian Kong, Harald Westerdahl, Svein Ellingsrud |
2002-11-12 |