US2666620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well coring method
Assignee: Standard Oil Development Co
•
Filing: 1948-05-29
•
Granted: 1954-01-19
•
Expires: 1968-05-29
Abstract
No abstract record available.
Inventors
- 👤 Henry J Welge
- 👤 Robert C West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:22
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN OIL WELL OPERATIONS THE PROCESS OF OBTAINING UNALTERED CORE SAMPLES COMPRISING THE STEPS OF INJECTING A MOLTEN THERMOPLASTIC MATERIAL INTO THE STRATUM TO BE TESTED, HARDENING SAID MATERIAL IN THE STRATUM WHEREBY THE PARTICLES OF STRATUM ARE BOUND, CUTTING A SAMPLE OF THE SAID STRATUM IMBEDDED IN THE THERMOPLASTIC MATERIAL, REMOVING THE SAID SAMPLE TO THE SURFACE OF THE EARTH, AND REMOVING THE THERMOPLASTIC MATERIAL FROM SAID SAMPLE WHEREBY A CORE IS OBTAINED WHEREIN THE SAND GRAINS ARE IN A CONDITION SUBSTANTIALLY THE SAME AS EXISTED IN SAID STRATUM, SAID THERMO-
Claim 2
Dependent Claim
92 words
IN OIL WELL OPERATIONS THE PROCESS OF OBTAINING UNALTERED CORE SAMPLES COMPRISING THE STEPS OF INJECTING A MOLTEN THERMOPLASTIC MATERIAL INTO THE STRATUM TO BE TESTED, HARDENING SAID MATERIAL IN THE STRATUM WHEREBY THE PARTICLES OF STRATUM ARE BOUND, CUTTING A SAMPLE OF THE SAID STRATUM IMBEDDED IN THE THERMOPLASTIC MATERIAL, REMOVING THE SAID SAMPLE TO THE SURFACE OF THE EARTH, AND REMOVING THE THERMOPLASTIC MATERIAL FROM SAID SAMPLE WHEREBY A CORE IS OBTAINED WHEREIN THE SAND GRAINS ARE IN A CONDITION SUBSTANTIALLY THE SAME AS EXISTED IN SAID STRATUM, SAID THERMO-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |