US3335795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cementing method
Assignee: Texaco Inc
•
Filing: 1964-10-21
•
Granted: 1967-08-15
•
Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Richards
- 👤 Charles J Perilloux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14; E21B43/00; E21B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN MULTIPLE COMPLETION OF A WELL HAVING A PLURALITY OF PRODUCIG ZONES THEREIN AND WHEREIN A PLURALITY OF CASING STRINGS ARE SET AND A PRIMARY APPLICATION OF CEMENT IF MADE TO EXTEND OVER AT LEAST THE LENGTH OF THE WELL INCLUDING SAID PRODUCING ZONES, A SECONARY CEMENTING PROCEDURE COMPRISING THE STEPS OF MOUNTING VALVE MEANS IN AT LEAST ONE OF SAID CASING STRINGS TO BE LOCATED NEAR EACH OF SAID PRODUCING ZONESX, OPENING ONE OF SAID VALVE MEANS, AND SQUEEZING A QUANTITY OF CEMENT THROUGH SAID OPEN VALVE MEANS IN ORDER TO SEAL OFF SAID WELL FROM VERTICAL FLOW OF FLUID WITHIN THE ANNULUS THEREOF SURROUNDING SAID CASING STRINGS.
Claim 2
Dependent Claim
109 words
IN MULTIPLE COMPLETION OF A WELL HAVING A PLURALITY OF PRODUCIG ZONES THEREIN AND WHEREIN A PLURALITY OF CASING STRINGS ARE SET AND A PRIMARY APPLICATION OF CEMENT IF MADE TO EXTEND OVER AT LEAST THE LENGTH OF THE WELL INCLUDING SAID PRODUCING ZONES, A SECONARY CEMENTING PROCEDURE COMPRISING THE STEPS OF MOUNTING VALVE MEANS IN AT LEAST ONE OF SAID CASING STRINGS TO BE LOCATED NEAR EACH OF SAID PRODUCING ZONESX, OPENING ONE OF SAID VALVE MEANS, AND SQUEEZING A QUANTITY OF CEMENT THROUGH SAID OPEN VALVE MEANS IN ORDER TO SEAL OFF SAID WELL FROM VERTICAL FLOW OF FLUID WITHIN THE ANNULUS THEREOF SURROUNDING SAID CASING STRINGS.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |