Kevin C. Graf

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Calgary, CA

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Patents Grantslast 30 patents

Information Patent Grant
Downhole tool having a shock-absorbing sleeve
- Patent number 10,605,045
- Issue date Mar 31, 2020
- KOBOLD CORPORATION
- Per Angman
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole tool having a shock-absorbing sleeve
- Patent number 9,840,888
- Issue date Dec 12, 2017
- KOBOLD CORPORATION
- Per Angman
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
DOWNHOLE TOOL HAVING A SHOCK-ABSORBING SLEEVE
- Publication number 20200149369
- Publication date May 14, 2020
- KOBOLD CORPORATION
- Per ANGMAN
- E21 - EARTH DRILLING MINING
Information Patent Application
DOWNHOLE TOOL HAVING A SHOCK-ABSORBING SLEEVE
- Publication number 20180038198
- Publication date Feb 8, 2018
- KOBOLD SERVICES INC.
- Per ANGMAN
- E21 - EARTH DRILLING MINING
Information Patent Application
DOWNHOLE TOOL HAVING A SHOCK-ABSORBING SLEEVE
- Publication number 20150013991
- Publication date Jan 15, 2015
- KOBOLD SERVICES INC.
- Per ANGMAN
- E21 - EARTH DRILLING MINING
Information Patent Application
APPARATUS AND METHODS FOR WELLBORE COMPLETION
- Publication number 20130213646
- Publication date Aug 22, 2013
- KOBOLD SERVICES INC.
- Per ANGMAN
- E21 - EARTH DRILLING MINING
Information Patent Application
Cutting Structure for Casing Drilling Underreamer
- Publication number 20100193250
- Publication date Aug 5, 2010
- TESCO Corporation
- Kevin C. Graf
- E21 - EARTH DRILLING MINING