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Lennard Sihlis
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Calgary, CA
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Patents Grants
last 30 patents
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Patent Grant
Profile selective system for downhole tools
Patent number
9,739,117
Issue date
Aug 22, 2017
Gryphon Oilfield Solutions, LLC
Sean Patrick Campbell
E21 - EARTH DRILLING MINING
Information
Patent Grant
Orienting tool for coiled tubing drilling
Patent number
5,894,896
Issue date
Apr 20, 1999
Canadian Fracmaster Ltd.
Donald Smith
E21 - EARTH DRILLING MINING
Information
Patent Grant
Adjustable bent housing II
Patent number
5,269,385
Issue date
Dec 14, 1993
Canadian Fracmaster Ltd.
Lennard Sihlis
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Metal Ring Seal and Improved Profile Selective System for Downhole...
Publication number
20180355976
Publication date
Dec 13, 2018
Gryphon Oilfield Solutions, LLC
John Andrew Markiw
E21 - EARTH DRILLING MINING
Information
Patent Application
Profile Selective System for Downhole Tools
Publication number
20170350215
Publication date
Dec 7, 2017
Gryphon Oilfield Solutions, LLC
Sean Patrick Campbell
E21 - EARTH DRILLING MINING
Information
Patent Application
PROFILE SELECTIVE SYSTEM FOR DOWNHOLE TOOLS
Publication number
20150060076
Publication date
Mar 5, 2015
STONECREEK TECHNOLOGIES INC.
Sean Patrick CAMPBELL
E21 - EARTH DRILLING MINING