Dietmar Krehl

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Latchendorf, DE

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Patents Grantslast 30 patents

Information Patent Grant
Directional drilling tool apparatus and method
- Patent number 5,156,222
- Issue date Oct 20, 1992
- Baker Hughes Incorporated
- Rainer Jurgens
- E21 - EARTH DRILLING MINING
Information Patent Grant
One trip window cutting tool method and apparatus
- Patent number 5,109,924
- Issue date May 5, 1992
- Baker Hughes Incorporated
- Rainer Jurgens
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mechanical jarring tool
- Patent number 4,463,815
- Issue date Aug 7, 1984
- Christensen, Inc.
- Rainer Jurgens
- E21 - EARTH DRILLING MINING