US3172469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
U-tube well completion and method
Assignee: Kobe Inc
•
Filing: 1962-07-30
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Granted: 1965-03-09
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Coberly
- 👤 Kogut Val
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF COMPLETING A WELL DRILLED FROM THE SURFACE AT LEAST INTO A PRODUCTIVE FORMATION, INCLUDING THE STEPS OF: (A) SETTING IN THE WELL IN SIDE-BY-SIDE RELATION TWO TUBINGS WHICH ARE INTERCONNECTED AT THEIR LOWER ENDS, ONE OF SAID TUBINGS BEING PROVIDED WITH A CEMENT DISCHARGE OPENING THEREIN ADJACENT ITS LOWER END AND HAVING A PLUG THEREIN BELOW SAID OPENING; (B) FLOWING CEMENT DOWNWARDLY THROUGH SAID ONE TUBING AND DISCHARGING IT THROUGH SAID OPENING UNTIL SAID TUBINGS ARE CEMENTED IN PLACE IN THE WELL OPPOSITE AND ADJACENT THE PRODUCTIVE FORMATION; (C) PURGING SAID ONE TUBING OF CEMENT; (D) REMOVING SAID PLUG FROM SAID ONE TUBING; AND (E) PERFORATING ONE OF SAID TUBINGS AND THE CEMENT SURROUNDING SAME OPPOSITE THE PRODUCTIVE FORMATION AND AT A LEVEL ABOVE THE LOWER ENDS OF SAID TUBINGS.
Claim 2
Independent Claim
133 words
A METHOD OF COMPLETING A WELL DRILLED FROM THE SURFACE AT LEAST INTO A PRODUCTIVE FORMATION, INCLUDING THE STEPS OF: (A) SETTING IN THE WELL IN SIDE-BY-SIDE RELATION TWO TUBINGS WHICH ARE INTERCONNECTED AT THEIR LOWER ENDS, ONE OF SAID TUBINGS BEING PROVIDED WITH A CEMENT DISCHARGE OPENING THEREIN ADJACENT ITS LOWER END AND HAVING A PLUG THEREIN BELOW SAID OPENING; (B) FLOWING CEMENT DOWNWARDLY THROUGH SAID ONE TUBING AND DISCHARGING IT THROUGH SAID OPENING UNTIL SAID TUBINGS ARE CEMENTED IN PLACE IN THE WELL OPPOSITE AND ADJACENT THE PRODUCTIVE FORMATION; (C) PURGING SAID ONE TUBING OF CEMENT; (D) REMOVING SAID PLUG FROM SAID ONE TUBING; AND (E) PERFORATING ONE OF SAID TUBINGS AND THE CEMENT SURROUNDING SAME OPPOSITE THE PRODUCTIVE FORMATION AND AT A LEVEL ABOVE THE LOWER ENDS OF SAID TUBINGS.
References Cited (Backward Citations)
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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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |