Sergey V. Efremov

Follow

Person

Houston, TX, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method of calibrating multi-channel nuclear energy spectra
- Patent number 7,446,308
- Issue date Nov 4, 2008
- Baker Hughes Incorporated
- W. Allen Gilchrist
- G01 - MEASURING TESTING
Information Patent Grant
Measurement-while-drilling assembly using real-time toolface orient...
- Patent number 7,195,062
- Issue date Mar 27, 2007
- Baker Hughes Incorporated
- Paul G. Cairns
- G01 - MEASURING TESTING
Information Patent Grant
Method of processing data from a dual detector LWD density logging...
- Patent number 7,129,477
- Issue date Oct 31, 2006
- Baker Hughes Incorporated
- David M. Schneider
- G01 - MEASURING TESTING
Information Patent Grant
Measurement-while-drilling assembly using real-time toolface orient...
- Patent number 7,000,700
- Issue date Feb 21, 2006
- Baker Hughes Incorporated
- Paul G. Cairns
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Method of calibrating multi-channel nuclear energy spectra
- Publication number 20070145259
- Publication date Jun 28, 2007
- Baker Hughes Incorporated
- W. Allen Gilchrist
- G01 - MEASURING TESTING
Information Patent Application
Measurement-while-drilling assembly using real-time toolface orient...
- Publication number 20060149477
- Publication date Jul 6, 2006
- BAKER HUGHES INCORPORATED
- Paul G. Cairns
- E21 - EARTH DRILLING MINING
Information Patent Application
Measurement-while-drilling assembly using real-time toolface orient...
- Publication number 20040079526
- Publication date Apr 29, 2004
- BAKER HUGHES INCORPORATED
- Paul G. Cairns
- E21 - EARTH DRILLING MINING
Information Patent Application
Method of processing data from a dual detector LWD density logging...
- Publication number 20040021066
- Publication date Feb 5, 2004
- Baker Hughes Incorporated
- David M. Schneider
- G01 - MEASURING TESTING