US2588210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of locating leaks in well bores
Assignee: Gulf Research and Development Co
•
Filing: 1949-11-18
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Granted: 1952-03-04
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Expires: 1969-11-18
Abstract
No abstract record available.
Inventors
- 👤 Orvil W Crisman
- 👤 Abraham J Teplitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:33
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/11; E21B47/111
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF LOCATING LEAKS IN A WELL BORE WHICH COMPRISES INTRODUCING INTO THE WELL BORE A COMPOSITION COMPRISING A DRILLING FLUID AND A TRACEABLE SEALING MATERIAL WHICH COMPRISES FRAGMENTS OF FLEXIBLE, DEFORMABLE MATERIAL INSOLUBLE IN THE DRILLING FLUID AND HAVING A STRUCTURE RANGING FROM FIBROUS TO LAMELLAR, SAID FRAGMENTS HAVING INCORPORATED THEREWITH A RADIOACTIVE MATERIAL INSOLUBLE IN THE DRILLING FLUID, AND THEN LOCATING THE DEPTH OF THE RADIOACTIVE SEALING MATERIAL BY SURVEYING THE WELL FOR RADIOACTIVITY.
Claim 2
Independent Claim
77 words
THE METHOD OF LOCATING LEAKS IN A WELL BORE WHICH COMPRISES INTRODUCING INTO THE WELL BORE A COMPOSITION COMPRISING A DRILLING FLUID AND A TRACEABLE SEALING MATERIAL WHICH COMPRISES FRAGMENTS OF FLEXIBLE, DEFORMABLE MATERIAL INSOLUBLE IN THE DRILLING FLUID AND HAVING A STRUCTURE RANGING FROM FIBROUS TO LAMELLAR, SAID FRAGMENTS HAVING INCORPORATED THEREWITH A RADIOACTIVE MATERIAL INSOLUBLE IN THE DRILLING FLUID, AND THEN LOCATING THE DEPTH OF THE RADIOACTIVE SEALING MATERIAL BY SURVEYING THE WELL FOR RADIOACTIVITY.
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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) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |