David George Livesey Smith

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Rijswijk, NL

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Patents Applicationslast 30 patents

Information Patent Application
Injecting a fluid into a borehole ahead of the bit
- Publication number 20040238218
- Publication date Dec 2, 2004
- Douwe Johannes Runia
- E21 - EARTH DRILLING MINING
Information Patent Application
Steerable rotary drill bit assembly with pilot bit
- Publication number 20040238221
- Publication date Dec 2, 2004
- Douwe Johannes Runia
- E21 - EARTH DRILLING MINING