Wilhelmus Hubertus Paulus Maria Heijnen

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Velsen, NL

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Patents Grantslast 30 patents

Information Patent Grant
Sealing off openings through the wall of a well tubular
- Patent number 6,742,585
- Issue date Jun 1, 2004
- Shell Oil Company
- Stephen Richard Braithwaite
- E21 - EARTH DRILLING MINING
Information Patent Grant
Downhole electric power generator
- Patent number 6,705,085
- Issue date Mar 16, 2004
- Shell Oil Company
- Stephen Richard Braithwaite
- E21 - EARTH DRILLING MINING
Information Patent Grant
Apparatus for compressing a fluid
- Patent number 5,295,810
- Issue date Mar 22, 1994
- Shell Oil Company
- Wilhelmus H. P. M. Heijnen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for perforating a well liner and for fracturin...
- Patent number 5,103,911
- Issue date Apr 14, 1992
- Shell Oil Company
- Wilhelmus H. P. M. Heijnen
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and device for joining well tubulars
- Patent number 5,071,053
- Issue date Dec 10, 1991
- Shell Research Limited
- Wilhelmus H. P. M. Heijnen
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR