Simon C. Johnson

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Bristol, GB

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Patents Grantslast 30 patents

Information Patent Grant
Representation of whirl in fixed cutter drill bits
- Patent number 7,457,734
- Issue date Nov 25, 2008
- ReedHycalog UK Limited
- Simon Johnson
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
REPRESENTATION OF WHIRL IN FIXED CUTTER DRILL BITS
- Publication number 20070144789
- Publication date Jun 28, 2007
- Simon Johnson
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Stable Rotary Drill Bit
- Publication number 20060260845
- Publication date Nov 23, 2006
- Simon C. Johnson
- E21 - EARTH DRILLING MINING