Inventor
HAHN DETLEF
DE24 patents
⚠️ This page may combine multiple inventors who share the name “HAHN DETLEF”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BAKER HUGHES INC
10 patentsUS6196336B1Mar 6, 2001
Method and apparatus for drilling boreholes in earth formations (drilling liner systems)
BAKER HUGHES INC270 citations99
US6626253B2Sep 30, 2003
Oscillating shear valve for mud pulse telemetry
BAKER HUGHES INC103 citations98
US6419033B1Jul 16, 2002
Apparatus and method for simultaneous drilling and casing wellbores
BAKER HUGHES INC225 citations98
US7417920B2Aug 26, 2008
Reciprocating pulser for mud pulse telemetry
BAKER HUGHES INC60 citations97
US6898150B2May 24, 2005
Hydraulically balanced reciprocating pulser valve for mud pulse telemetry
BAKER HUGHES INC102 citations97
US6975244B2Dec 13, 2005
Oscillating shear valve for mud pulse telemetry and associated methods of use
BAKER HUGHES INC46 citations95
US8011450B2Sep 6, 2011
Active bottomhole pressure control with liner drilling and completion systems
BAKER HUGHES INC29 citations92
US7808859B2Oct 5, 2010
Oscillating shear valve for mud pulse telemetry
BAKER HUGHES INC22 citations92
US7280432B2Oct 9, 2007
Oscillating shear valve for mud pulse telemetry
BAKER HUGHES INC26 citations92
US7250873B2Jul 31, 2007
Downlink pulser for mud pulse telemetry
BAKER HUGHES INC30 citations92
DBT GMBH
3 patentsUS6186597B1Feb 13, 2001
Pick system for mining ploughs, in particular coal ploughs
DBT GMBH10 citations69
US6872025B2Mar 29, 2005
Toggle retainer for toggle connections
DBT GMBH2 citations61
US7350874B2Apr 1, 2008
Method and device for extracting extraction products in underground mining
DBT GMBH4 citations55