Assignee
SCIENT DRILLING INT
US35 patents
Top patents by PatentIndex Score
US5130706AJul 14, 1992
Direct switching modulation for electromagnetic borehole telemetry
SCIENT DRILLING INT122 citations98
US6396276B1May 28, 2002
Apparatus and method for electric field telemetry employing component upper and lower housings in a well pipestring
SCIENT DRILLING INT91 citations96
US6188223B1Feb 13, 2001
Electric field borehole telemetry
SCIENT DRILLING INT90 citations96
US5883516AMar 16, 1999
Apparatus and method for electric field telemetry employing component upper and lower housings in a well pipestring
SCIENT DRILLING INT137 citations96
US5389003AFeb 14, 1995
Wireline wet connection
SCIENT DRILLING INT69 citations94
US5321893AJun 21, 1994
Calibration correction method for magnetic survey tools
SCIENT DRILLING INT64 citations94
US5836353ANov 17, 1998
Valve assembly for borehole telemetry in drilling fluid
SCIENT DRILLING INT36 citations93
US7518528B2Apr 14, 2009
Electric field communication for short range data transmission in a borehole
SCIENT DRILLING INT18 citations92
US7287605B2Oct 30, 2007
Steerable drilling apparatus having a differential displacement side-force exerting mechanism
SCIENT DRILLING INT30 citations92
US6698516B2Mar 2, 2004
Method for magnetizing wellbore tubulars
SCIENT DRILLING INT29 citations92
US6483310B1Nov 19, 2002
Retrievable, formation resistivity tool, having a slotted collar
SCIENT DRILLING INT54 citations92
US5960370ASep 28, 1999
Method to determine local variations of the earth's magnetic field and location of the source thereof
SCIENT DRILLING INT41 citations92
US5590714AJan 7, 1997
Multi-mode cushioning an instrument suspended in a well
SCIENT DRILLING INT20 citations92
US5520246AMay 28, 1996
Multi-mode cushioning an instrument suspended in a well
SCIENT DRILLING INT29 citations92
US5366018ANov 22, 1994
Miniature rope socket assembly for combined mechanical and electrical connection in a borehole wireline
SCIENT DRILLING INT29 citations92
US5740127AApr 14, 1998
Pulse production and control in drill strings
SCIENT DRILLING INT65 citations91
US7028409B2Apr 18, 2006
Method for computation of differential azimuth from spaced-apart gravity component measurements
SCIENT DRILLING INT26 citations90
US6816788B2Nov 9, 2004
Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment
SCIENT DRILLING INT31 citations90
US6651496B2Nov 25, 2003
Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment
SCIENT DRILLING INT43 citations90
US4774694ASep 27, 1988
Well information telemetry by variation of mud flow rate
SCIENT DRILLING INT34 citations90
US4694439ASep 15, 1987
Well information telemetry by variation of mud flow rate
SCIENT DRILLING INT25 citations90
US9045941B2Jun 2, 2015
Hybrid bearings for downhole motors
SCIENT DRILLING INT29 citations89
US6608565B1Aug 19, 2003
Downward communication in a borehole through drill string rotary modulation
SCIENT DRILLING INT42 citations89
US5155916AOct 20, 1992
Error reduction in compensation of drill string interference for magnetic survey tools
SCIENT DRILLING INT73 citations86
US6530154B2Mar 11, 2003
Method to detect deviations from a wellplan while drilling in the presence of magnetic interference
SCIENT DRILLING INT18 citations83
US4715022ADec 22, 1987
Detection means for mud pulse telemetry system
SCIENT DRILLING INT57 citations82
US8044819B1Oct 25, 2011
Coal boundary detection using an electric-field borehole telemetry apparatus
SCIENT DRILLING INT14 citations79
US5507348AApr 16, 1996
Apparatus for locking wire line instrument to drill collar
SCIENT DRILLING INT15 citations73
US7576532B2Aug 18, 2009
Motion transducer for motion related to the direction of the axis of an eddy-current displacement sensor
SCIENT DRILLING INT7 citations66
US7225888B1Jun 5, 2007
Hydraulic fluid coupling
SCIENT DRILLING INT2 citations59
US4649344AMar 10, 1987
Test circuit for detector used in well bore
SCIENT DRILLING INT6 citations53
US9291047B2Mar 22, 2016
Attitude reference for tieback/overlap processing
SCIENT DRILLING INT2 citations52
US9093875B2Jul 28, 2015
Downhole apparatus for electrical power generation from shaft flexure
SCIENT DRILLING INT0 citations44
US9309738B2Apr 12, 2016
Break-away support ring for wellbore apparatus
SCIENT DRILLING INT0 citations31
US9309720B2Apr 12, 2016
Double shaft drilling apparatus with hanger bearings
SCIENT DRILLING INT0 citations25