David P. Herd

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Underwater well completion method and apparatus
- Patent number 4,053,023
- Issue date Oct 11, 1977
- McEvoy Oilfield Equipment Co.
- David P. Herd
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulic control system for controlling a plurality of underwater...
- Patent number 3,993,100
- Issue date Nov 23, 1976
- Stewart & Stevenson Oiltools, Inc.
- Terry W. Pollard
- E21 - EARTH DRILLING MINING
Information Patent Grant
Underwater well completion method and apparatus
- Patent number 3,974,875
- Issue date Aug 17, 1976
- McEvoy Oilfield Equipment Co.
- David P. Herd
- E21 - EARTH DRILLING MINING
Information Patent Grant
Underwater well completion method and apparatus
- Patent number 3,971,576
- Issue date Jul 27, 1976
- McEvoy Oilfield Equipment Co.
- David P. Herd
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Radial penetrator assembly and method
- Publication number 20050067167
- Publication date Mar 31, 2005
- Douglas D. Hall
- E21 - EARTH DRILLING MINING