US2983586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole testing method and apparatus
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1957-11-07
•
Granted: 1961-05-09
•
Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Blanchard Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:14
CPC Classifications
G; G01; G01V; G01V9/00; G01V9/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A METHOD FOR DETECTING THE PRESENCE OF OXIDIZABLE MATERIALS IN EARTH FORMATIONS TRAVERSED BY A BOREHOLE ON THE SIDES OF WHICH MUDCAKE HAS FORMED, COMPRISING THE STEPS OF ISOLATING AN AREA OF THE BOREHOLE WALL INCLUDING ANY MUDCAKE ADJACENT THERETO, OPENING SAID ISOLATED AREA TO AN ENCLOSED VOLUME AT A PRESSURE ON THE ORDER OF ATMOSPHERIC PRESSURE THEREBY SELECTIVELY CAUSING THE FLUIDS PRESENT IN THE EARTH FORMATIONS ADJACENT THE ISOLATED AREA TO FLUSH THE MUDCAKE AWAY FROM SAID ISOLATED AREA OF THE BOREHOLE WALL AND INTO AN AREA REMOVED FROM SAID ISOLATED AREA, INTRODUCING AFTER REMOVAL OF THE MUDCAKE AN OXIDIZING AGENT CAPABLE OF REACTING WITH OXIDIZABLE MATERIALS IN THE EARTH FORMATIONS INTO A SPACE CONTIGUOUS WITH EXPOSED PORTIONS OF SAID EARTH FORMATIONS IN THE ISOLATED AREA OF THE BOREHOLE WALL AT A PRESSURE AT LEAST EQUAL TO THE PRESSURE OF THE FLUIDS PRESENT IN THE EARTH FORMATIONS SO AS TO CAUSE A DETECTABLE REACTION BETWEEN SAID OXIDIZING AGENT AND ANY OXIDIZABLE MATERIALS PRESENT IN SAID FORMATION, AND PROVIDING AN INDICATION OF THE OCCURRENCE OF THE REACTION.
Claim 2
Independent Claim
177 words
A METHOD FOR DETECTING THE PRESENCE OF OXIDIZABLE MATERIALS IN EARTH FORMATIONS TRAVERSED BY A BOREHOLE ON THE SIDES OF WHICH MUDCAKE HAS FORMED, COMPRISING THE STEPS OF ISOLATING AN AREA OF THE BOREHOLE WALL INCLUDING ANY MUDCAKE ADJACENT THERETO, OPENING SAID ISOLATED AREA TO AN ENCLOSED VOLUME AT A PRESSURE ON THE ORDER OF ATMOSPHERIC PRESSURE THEREBY SELECTIVELY CAUSING THE FLUIDS PRESENT IN THE EARTH FORMATIONS ADJACENT THE ISOLATED AREA TO FLUSH THE MUDCAKE AWAY FROM SAID ISOLATED AREA OF THE BOREHOLE WALL AND INTO AN AREA REMOVED FROM SAID ISOLATED AREA, INTRODUCING AFTER REMOVAL OF THE MUDCAKE AN OXIDIZING AGENT CAPABLE OF REACTING WITH OXIDIZABLE MATERIALS IN THE EARTH FORMATIONS INTO A SPACE CONTIGUOUS WITH EXPOSED PORTIONS OF SAID EARTH FORMATIONS IN THE ISOLATED AREA OF THE BOREHOLE WALL AT A PRESSURE AT LEAST EQUAL TO THE PRESSURE OF THE FLUIDS PRESENT IN THE EARTH FORMATIONS SO AS TO CAUSE A DETECTABLE REACTION BETWEEN SAID OXIDIZING AGENT AND ANY OXIDIZABLE MATERIALS PRESENT IN SAID FORMATION, AND PROVIDING AN INDICATION OF THE OCCURRENCE OF THE REACTION.
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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |