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Donald J. Ortloff
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Houston, TX, US
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last 30 patents
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Patent Grant
Tubular coupling with metal to metal seal
Patent number
5,423,579
Issue date
Jun 13, 1995
Hydril Company
Thomas L. Blose
E21 - EARTH DRILLING MINING
Information
Patent Grant
Elastomeric guard seal for tubular connections
Patent number
4,928,999
Issue date
May 29, 1990
Hydril Company
L. Steven Landriault
E21 - EARTH DRILLING MINING
Information
Patent Grant
Threaded pipe connection having wedge threads
Patent number
4,703,954
Issue date
Nov 3, 1987
Hydril Company
Donald J. Ortloff
E21 - EARTH DRILLING MINING
Information
Patent Grant
Well pipe joint
Patent number
4,688,832
Issue date
Aug 25, 1987
Hydril Company
Donald J. Ortloff
E21 - EARTH DRILLING MINING
Information
Patent Grant
Seal for threaded pipe connection
Patent number
4,671,544
Issue date
Jun 9, 1987
Hydril Company
Donald J. Ortloff
E21 - EARTH DRILLING MINING
Information
Patent Grant
Tubular joint with trapped mid-joint metal-to-metal seal having une...
Patent number
4,662,659
Issue date
May 5, 1987
Hydril Company
Thomas L. Blose
E21 - EARTH DRILLING MINING