US3096476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhauser effect well logging
Assignee: CALIFRONIA RES CORP
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Filing: 1958-09-02
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Granted: 1963-07-02
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Expires: 1978-09-02
Abstract
No abstract record available.
Inventors
- 👤 Edward H Poindexter
- 👤 Henry C Torrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:53
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOF OF LOGGING AN EARTH FORMATION PENETRATED BY A WELL BORE FOR THE PRESENCE OF HYDROGEN NUCLEI IN THE FORM OF WATER AND CRUDE OIL COMPRISING THE STEPS OF (A) PERFORMING A FIRST NUCLEAR MAGNETISM WELL LOGGING OPERATION WITH SAID WELL BORE TO POLARIZE HYDROGEN NUCLEI IN THE FORM OF WATER AND CRUDE OIL PRESENT IN SAID FORMATION, (B) DETECTING NUCLEAR MAGNETISM PRECESSIONAL SIGNALS FROM PRECESSING PROTONS IN SAID POLARIZED NUCLEI AS A RESULT OF SAID FIRST LOGGING OPERATION, (C) REPEATING SAID NUCLEAR MAGNETISM LOGGING OPERATION TO AGAIN POLARIZE SAID HYDROGEN NUCLEI AND, DURING AT LEAST A PORTION OF SAID REPEATED NUCLEAR MAGNETISM LOGGING OPERATION, IRRADIATING SAID EARTH FORMATION WITH AN OSCILLATING ELECTROMAGNETIC FIELD, SAID ELECTROMAGNETIC FIELD HAVING A FREQUENCY AND FIELD STRENGTH CAPABLE OF RESONANCE WITH PRECESSING UNPAIRED ELECTRONS ASSOCIATED WITH CRUDE OIL HYDROGEN NUCLEI WITHIN SAID FORMATION, (D) DETECTING NUCLEAR MAGNETISM PRECESSIONAL SIGNALS FROM PRECESSING PROTONS IN SAID POLARIZED NUCLEI AS A RESILT OF SAID REPEATED LOGGING OPERATION, (E) COMPARING SAID FIRST AND SECOND DETECTED SIGNALS AS AN INDICATION OF THE MOLECULAR ENVIRONMENT WITHIN
Claim 2
Dependent Claim
177 words
THE METHOF OF LOGGING AN EARTH FORMATION PENETRATED BY A WELL BORE FOR THE PRESENCE OF HYDROGEN NUCLEI IN THE FORM OF WATER AND CRUDE OIL COMPRISING THE STEPS OF (A) PERFORMING A FIRST NUCLEAR MAGNETISM WELL LOGGING OPERATION WITH SAID WELL BORE TO POLARIZE HYDROGEN NUCLEI IN THE FORM OF WATER AND CRUDE OIL PRESENT IN SAID FORMATION, (B) DETECTING NUCLEAR MAGNETISM PRECESSIONAL SIGNALS FROM PRECESSING PROTONS IN SAID POLARIZED NUCLEI AS A RESULT OF SAID FIRST LOGGING OPERATION, (C) REPEATING SAID NUCLEAR MAGNETISM LOGGING OPERATION TO AGAIN POLARIZE SAID HYDROGEN NUCLEI AND, DURING AT LEAST A PORTION OF SAID REPEATED NUCLEAR MAGNETISM LOGGING OPERATION, IRRADIATING SAID EARTH FORMATION WITH AN OSCILLATING ELECTROMAGNETIC FIELD, SAID ELECTROMAGNETIC FIELD HAVING A FREQUENCY AND FIELD STRENGTH CAPABLE OF RESONANCE WITH PRECESSING UNPAIRED ELECTRONS ASSOCIATED WITH CRUDE OIL HYDROGEN NUCLEI WITHIN SAID FORMATION, (D) DETECTING NUCLEAR MAGNETISM PRECESSIONAL SIGNALS FROM PRECESSING PROTONS IN SAID POLARIZED NUCLEI AS A RESILT OF SAID REPEATED LOGGING OPERATION, (E) COMPARING SAID FIRST AND SECOND DETECTED SIGNALS AS AN INDICATION OF THE MOLECULAR ENVIRONMENT WITHIN
References Cited (Backward Citations)
DE1015954B
Cited
FR1141373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |