Drilling system recorder
United States Patent 3364494
US Patent References:
/1282553.html
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- - 1435389

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Device for recording drilling operations
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Inventors:
Dellinger, Thomas B.
Hildebrandt, Alexander B.
Lynn, Ralph D.
Publication Date:
01/16/1968
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Assignee:
EXXON PRODUCTION RESEARCH CO
Primary Class:
346/30
Other Classes:
346/127, 235/61GM, 235/61R, 73/152.440, 175/40
International Classes:
E21B45/00
US Patent References:
2309675Management instrument for business
2935871Well logging apparatus