Inventor

ZAEPER RALF

DE4 patents

⚠️ This page may combine multiple inventors who share the name “ZAEPER RALF”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BAKER HUGHES INC

2 patents

US7477161B2Jan 13, 2009

Bidirectional telemetry apparatus and methods for wellbore operations

BAKER HUGHES INC25 citations89

US7694558B2Apr 13, 2010

Downhole washout detection system and method

BAKER HUGHES INC3 citations60

MACPHERSON JOHN D

1 patent

US8248266B2Aug 21, 2012

Bidirectional telemetry apparatus and methods for wellbore operations

MACPHERSON JOHN D9 citations80

ZAEPER RALF

1 patent

US8600679B2Dec 3, 2013

System and method to locate, monitor and quantify friction between a drillstring and a wellbore

ZAEPER RALF2 citations54