US3180409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orienting systems
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1959-09-29
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Granted: 1965-04-27
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Expires: 1979-09-29
Abstract
No abstract record available.
Inventors
- 👤 John T Dewan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11; E21B43/119
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A METHOD OF ORIENTING A PERFORATING APPARATUS IN A STRING OF WELL PIPE WITH RESPECT TO AT LEAST ONE OBJECT DISPOSED IN A MEDIA IN THE WELL BORE OUTSIDE THE PIPE COMPRISING THE STEPS OF: IRRADIATING A MEDIA AND AN OBJECT OF DIFFERENT COMPOSITIONS CHARACTERIZED BY DIFFERENT RADIOACTIVE HALF-LIVES FOR A PERIOD OF TIME WHEREIN THE MEDIA HAS A SHORTER HALF-LIFE THAN AN OBJECT, PERMITTING THE DELAYED RADIOACTIVITY INDUCED IN THE MEDIA TO SUBSIDE DURING A SUCCEEDING PERIOD OF TIME, AND SUBSEQUENTLY DETECTING THE DIRECTION IN WHICH A SELECTED VALUE OF THE REMAINING DELAYED RADIOACTIVITY IN AN OBJECT EXISTS AFTER THE RADIATION INDUCED IN THE MEDIA HAS SUBSTANTIALLY DECAYED, AND ORIENT-
Claim 2
Independent Claim
111 words
A METHOD OF ORIENTING A PERFORATING APPARATUS IN A STRING OF WELL PIPE WITH RESPECT TO AT LEAST ONE OBJECT DISPOSED IN A MEDIA IN THE WELL BORE OUTSIDE THE PIPE COMPRISING THE STEPS OF: IRRADIATING A MEDIA AND AN OBJECT OF DIFFERENT COMPOSITIONS CHARACTERIZED BY DIFFERENT RADIOACTIVE HALF-LIVES FOR A PERIOD OF TIME WHEREIN THE MEDIA HAS A SHORTER HALF-LIFE THAN AN OBJECT, PERMITTING THE DELAYED RADIOACTIVITY INDUCED IN THE MEDIA TO SUBSIDE DURING A SUCCEEDING PERIOD OF TIME, AND SUBSEQUENTLY DETECTING THE DIRECTION IN WHICH A SELECTED VALUE OF THE REMAINING DELAYED RADIOACTIVITY IN AN OBJECT EXISTS AFTER THE RADIATION INDUCED IN THE MEDIA HAS SUBSTANTIALLY DECAYED, AND ORIENT-
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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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |