US3559476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for testing a well
Assignee: Shell USA Inc
•
Filing: 1969-04-28
•
Granted: 1971-02-02
•
Expires: 1989-04-28
Abstract
Abstract A METHOD FOR MEASURING A RESERVOIR PROPERTY OF A POROUS EARTH FORMATION ADJACENT TO A WELL BY ESTABLISHING A PULSATING FLOW OR FLUID THROUGH THE WELL INTO AND OUT OF THE EARTH FORMATION AT RATES THAT VARY WITH TIME IN ACCORDANCE WITH A PREDETERMINED PERIODIC FUNCTION. THE VARIATIONS WITH TIME OF THE PRESSURE IN THE WELL IS MEASURED AND THE PHASE SHIFT AND AMPLITUDE OF THE PRESSURE VARIATIONS WITH TIME RELATIVE TO THE VARATIONS WITH TIME OF THE RATES OF THE PULSATING FLOW OF FLUID IS DETERMINED.
Inventors
- 👤 Chiang-Hai Kuo
- 👤 Peter Vanmeurs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:16
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/008
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |