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John F. Greenip
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Houston, TX, US
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last 30 patents
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Patent Grant
Collapsing type seal for expandable tubular connections
Patent number
6,554,287
Issue date
Apr 29, 2003
Hydril Company
Robert S. Sivley
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Patent Grant
Stress reduction groove for tubular connection
Patent number
6,050,610
Issue date
Apr 18, 2000
Hydril Company
Doug Enderle
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
Non-rotating expandable connection with collapsing type seal
Publication number
20030222409
Publication date
Dec 4, 2003
Robert S. Sivley
E21 - EARTH DRILLING MINING