Inventor · disambiguated record
David Close
Also filed as: CLOSE DAVID · CLOSE DAVID A
9 granted patents·227 citations·filing 1988–2021
88Inventor score
Top patents by PatentIndex Score
9 records- 0193US4903245ADownhole vibration monitoring of a drillstringEXPLORATION LOGGING INC·Filed 1988·Granted Feb 20, 1990·146 cites·12 claims
- 0290US7881155B2Pressure release encoding system for communicating downhole information through a wellbore to a surface locationWELLTRONICS APPLIC LLC·Filed 2010·Granted Feb 1, 2011·34 cites·10 claims
- 0382US9745843B1Method for determining position with improved calibrationNORALIS LTD·Filed 2016·Granted Aug 29, 2017·4 cites·19 claims
- 0480US9885232B2Method for determining position with improved calibration with opposing sensorsNORALIS LTD·Filed 2016·Granted Feb 6, 2018·5 cites·18 claims
- 0578US8467268B2Pressure release encoding system for communicating downhole information through a wellbore to a surface locationCLOSE DAVID·Filed 2011·Granted Jun 18, 2013·7 cites·16 claims
- 0664US8824241B2Method for a pressure release encoding system for communicating downhole information through a wellbore to a surface locationCLOSE DAVID·Filed 2011·Granted Sep 2, 2014·3 cites·15 claims
- 0761US7646310B2System for communicating downhole information through a wellbore to a surface locationCLOSE DAVID·Filed 2006·Granted Jan 12, 2010·9 cites·15 claims
- 0853US6944545B2System and method for determining the inclination of a wellboreFiled 2003·Granted Sep 13, 2005·19 cites·43 claims
- 0938US11952881B2Method for drilling with projections based on adjusted Kalman FiltersNORALIS LTD·Filed 2021·Granted Apr 9, 2024·0 cites·16 claims
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