Walter Thomas Welsh

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Lafayette, LA, US

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Patents Grantslast 30 patents

Information Patent Grant
Drill pipe racking apparatus
- Patent number 7,510,028
- Issue date Mar 31, 2009
- Walter Thomas Welsh
- E21 - EARTH DRILLING MINING
Information Patent Grant
Crown block dead line anchor
- Patent number 7,165,759
- Issue date Jan 23, 2007
- Walter Thomas Welsh
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Cantilever supported drilling rig
- Patent number 6,481,931
- Issue date Nov 19, 2002
- Walter Thomas Welsh
- E21 - EARTH DRILLING MINING
Information Patent Grant
Heave compensator for drill ships
- Patent number 5,894,895
- Issue date Apr 20, 1999
- Walter Thomas Welsh
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
Drill pipe racking apparatus
- Publication number 20080047752
- Publication date Feb 28, 2008
- Walter Thomas Welsh
- E21 - EARTH DRILLING MINING
Information Patent Application
Crown block dead line anchor
- Publication number 20060231813
- Publication date Oct 19, 2006
- Walter Thomas Welsh
- B66 - HOISTING LIFTING HAULING
Information Patent Application
Crown block shifting apparatus and method
- Publication number 20030111232
- Publication date Jun 19, 2003
- Walter Thomas Welsh
- B66 - HOISTING LIFTING HAULING