Inventor · disambiguated record
Friedhelm Makohl
Also filed as: MAKOHL FRIEDHELM
14 granted patents·2 pending applications·949 citations·filing 1983–2003
95Inventor score
Files withBAKER HUGHES INC11CHRISTENSEN INC NORTON1EASTMAN CHRISTENSEN CO1JUERGENS RAINER1SHELL OIL CO1
Top patents by PatentIndex Score
16 records- 0197US6419033B1Apparatus and method for simultaneous drilling and casing wellboresBAKER HUGHES INC·Filed 2000·Granted Jul 16, 2002·225 cites·12 claims
- 0297US6196336B1Method and apparatus for drilling boreholes in earth formations (drilling liner systems)BAKER HUGHES INC·Filed 1998·Granted Mar 6, 2001·270 cites·33 claims
- 0396US5738173AUniversal pipe and tubing injection apparatus and methodBAKER HUGHES INC·Filed 1996·Granted Apr 14, 1998·72 cites·30 claims
- 0493US5845708ACoiled tubing apparatusBAKER HUGHES INC·Filed 1997·Granted Dec 8, 1998·49 cites·24 claims
- 0589US6850068B2Formation resistivity measurement sensor contained onboard a drill bit (resistivity in bit)BAKER HUGHES INC·Filed 2003·Granted Feb 1, 2005·107 cites·12 claims
- 0686US6032744AUniversal pipe and tubing injection apparatus and methodBAKER HUGHES INC·Filed 1999·Granted Mar 7, 2000·26 cites·8 claims
- 0785US5823267AUniversal pipe and tubing injection apparatus and methodBAKER HUGHES INC·Filed 1997·Granted Oct 20, 1998·25 cites·10 claims
- 0880US5875850AUniversal pipe and tubing injection apparatus and methodBAKER HUGHES INC·Filed 1997·Granted Mar 2, 1999·21 cites·10 claims
- 0977US5890534AVariable injectorBAKER HUGHES INC·Filed 1997·Granted Apr 6, 1999·62 cites·16 claims
- 1064US4773489ACore drilling tool for boreholes in rockEASTMAN CHRISTENSEN CO·Filed 1987·Granted Sep 27, 1988·34 cites·18 claims
- 1156US6390201B1Method of creating a downhole sealing and hanging deviceSHELL OIL CO·Filed 2000·Granted May 21, 2002·19 cites·10 claims
- 1250US7234546B2Drilling and cementing casing systemBAKER HUGHES INC·Filed 2003·Granted Jun 26, 2007·14 cites·18 claims
- 1344US4485880ADirect drive for deep-well drillingCHRISTENSEN INC NORTON·Filed 1983·Granted Dec 4, 1984·13 cites·9 claims
- 1436US2003056991A1Apparatus and method for simultaneous drilling and casing wellboresBAKER HUGHES INC·Filed 2002·Application pending·0 cites
- 1534US5205364AProcess and drilling equipment for sinking a well in underground rock formationsJUERGENS RAINER·Filed 1991·Granted Apr 27, 1993·12 cites·25 claims
- 1630US2001045300A1Thruster responsive to drilling parametersFiled 1999·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Friedhelm Makohl files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →