Inventor
DRUMHELLER DOUGLAS S
US17 patents
⚠️ This page may combine multiple inventors who share the name “DRUMHELLER DOUGLAS S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SANDIA CORP
6 patentsUS6188647B1Feb 13, 2001
Extension method of drillstring component assembly
SANDIA CORP55 citations96
US6147932ANov 14, 2000
Acoustic transducer
SANDIA CORP67 citations96
US5703836ADec 30, 1997
Acoustic transducer
SANDIA CORP58 citations96
US5477505ADec 19, 1995
Downhole pipe selection for acoustic telemetry
SANDIA CORP70 citations96
US6791470B1Sep 14, 2004
Reducing injection loss in drill strings
SANDIA CORP27 citations92
US5823261AOct 20, 1998
Well-pump alignment system
SANDIA CORP25 citations92
TELECO OILFIELD SERVICES INC
3 patentsUS5128901AJul 7, 1992
Acoustic data transmission through a drillstring
TELECO OILFIELD SERVICES INC176 citations98
US5222049AJun 22, 1993
Electromechanical transducer for acoustic telemetry system
TELECO OILFIELD SERVICES INC62 citations96
US5056067AOct 8, 1991
Analog circuit for controlling acoustic transducer arrays
TELECO OILFIELD SERVICES INC38 citations92
CAMWELL PAUL L
3 patentsUS8982667B2Mar 17, 2015
Acoustic telemetry stacked-ring wave delay isolator system and method
CAMWELL PAUL L3 citations61
US8823543B2Sep 2, 2014
Telemetry wave detection apparatus and method
CAMWELL PAUL L2 citations61
US8437220B2May 7, 2013
Parallel-path acoustic telemetry isolation system and method
CAMWELL PAUL L2 citations61