Methods and apparatus for coring
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United States of America Patent
Stats
-
Jan 16, 2018
Issued Date -
N/A
app pub date -
Apr 17, 2013
filing date -
Apr 17, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Described herein is an inner tube for a core barrel which has a structure adapted to retain lubricant for lubricating a sampled core. The internal surface of the inner tube includes a plurality of structures to retain lubricant adjacent a core received in the inner tube. An example structure is multiple alveoli in which lubricant is retained.
First Claim
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International Classification(s)
- 2013 Application Filing Year
- E21B Class
- 3688 Applications Filed
- 3292 Patents Issued To-Date
- 89.27 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- E21B Class
- 0 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 16, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 16, 2029 |
