US2747100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for displacing well fluid with a fluid having smaller neutron attenuation characteristics
Assignee: Gulf Research and Development Co
•
Filing: 1952-09-19
•
Granted: 1956-05-22
•
Expires: 1972-09-19
Abstract
No abstract record available.
Inventors
- 👤 Malcolm R J Wyllie
- 👤 Charles W Tittle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:54
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN THE METHOD OF BOREHOLE LOGGING WHEREIN A PROBE INCLUDING A NEUTRON DETECTOR IS MOVED THROUGH A BOREHOLE, A IMPROVEMENT FOR REDUCING UNDESIRED NEUTRON ATTENUATION BY BOREHOLE FLUID; SAID IMPROVEMENT COMPRISING DISPLACING A SUBSTANTIAL PORTION OF BOREHOLE FLUID SURROUNDING THE PROBE BY A FLUID OF LOW NEUTRO-ATTENUATION CHARACTERISTICS, CONSTRAINING THE LAST-MENTIONED FLUID TO MOVE WITH THE PROBE, EXPANDING AND CONTRACTING THE HORIZONTAL EXTENT OF THE LAST-MENTIONED FLUID DURING MOVEMENT OF THE PROBE TO CORRESPOND TO IRREGULARITIES IN BOREHOLE DIMENSIONS, AND SUBSTANTIALLY PREVENTING THE MOVEMENT OF BOREHOLE FLUID BETWEEN THE WALL OF THE BOREHOLE AND THE FLUID OF LOW NEUTRON ATTENUATION CHARACTERISTICS BY BY-PASSING BOREHOLE FLUID THROUGH THE PROBE.
Claim 2
Dependent Claim
108 words
IN THE METHOD OF BOREHOLE LOGGING WHEREIN A PROBE INCLUDING A NEUTRON DETECTOR IS MOVED THROUGH A BOREHOLE, A IMPROVEMENT FOR REDUCING UNDESIRED NEUTRON ATTENUATION BY BOREHOLE FLUID; SAID IMPROVEMENT COMPRISING DISPLACING A SUBSTANTIAL PORTION OF BOREHOLE FLUID SURROUNDING THE PROBE BY A FLUID OF LOW NEUTRO-ATTENUATION CHARACTERISTICS, CONSTRAINING THE LAST-MENTIONED FLUID TO MOVE WITH THE PROBE, EXPANDING AND CONTRACTING THE HORIZONTAL EXTENT OF THE LAST-MENTIONED FLUID DURING MOVEMENT OF THE PROBE TO CORRESPOND TO IRREGULARITIES IN BOREHOLE DIMENSIONS, AND SUBSTANTIALLY PREVENTING THE MOVEMENT OF BOREHOLE FLUID BETWEEN THE WALL OF THE BOREHOLE AND THE FLUID OF LOW NEUTRON ATTENUATION CHARACTERISTICS BY BY-PASSING BOREHOLE FLUID THROUGH THE PROBE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |