US2747401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for determining hydraulic characteristics of formations traversed by a borehole
Assignee: Schlumberger Well Surveying Corp
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Filing: 1952-05-13
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Granted: 1956-05-29
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Expires: 1972-05-13
Abstract
No abstract record available.
Inventors
- 👤 Doll Henri-Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:32
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A METHOD FOR ASCERTAINING A HYDRAULIC CHARACTERISTIC OF GEOLOGICAL FORMATION TRAVERSED BY A BORE HOLE, THE STEPS OF FORMING A CONFINED FLOW CHANNEL BETWEEN THE BORE HOLE AND A POINT WITHIN THE FORMATION, PASSING FLUID THROUGH THE CHANNEL FOR CREATING A PRESSURE GRADIENT SUBSTANTIALLY SURROUNDING SAID POINT WITHIN THE FORMATION, AND DETERMINING THE DIFFERENCE IN PRESSURE BETWEEN SAID POINT AND A REFERENCE POING, THEREBY TO
Claim 2
Dependent Claim
66 words
IN A METHOD FOR ASCERTAINING A HYDRAULIC CHARACTERISTIC OF GEOLOGICAL FORMATION TRAVERSED BY A BORE HOLE, THE STEPS OF FORMING A CONFINED FLOW CHANNEL BETWEEN THE BORE HOLE AND A POINT WITHIN THE FORMATION, PASSING FLUID THROUGH THE CHANNEL FOR CREATING A PRESSURE GRADIENT SUBSTANTIALLY SURROUNDING SAID POINT WITHIN THE FORMATION, AND DETERMINING THE DIFFERENCE IN PRESSURE BETWEEN SAID POINT AND A REFERENCE POING, THEREBY TO
References Cited (Backward Citations)
US2126575A
Cited
US2198821A
Cited
DE722745C
Cited
US2284707A
Cited
US2381929A
Cited
US2375865A
Cited
US2345935A
Cited
US2360886A
Cited
US2521976A
Cited
US2607220A
Cited
US2612346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |