US3299952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of viscoelastic liquids for cementing wells in subterranean formations
Assignee: Mobil Oil AS
•
Filing: 1964-06-18
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Granted: 1967-01-24
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Expires: 1984-06-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Savins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:39
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A METHOD OF CEMENTING A WELL IN THE EARTH WHEREIN CEMENT IS PASSED INTO SAID WELL, SAID WELL HAVING BEEN DRILLED EMPLOYING A DRILLING MUD CONTAINING A LIQUID PHASE AND A SOLID CONSTITUENT AND A CAKE OF GELLED DRILLING MUD REMAINS IN SAID WELL, THE STEP COMPRISING PASSING INTO SAID WELL PRIOR TO SAID CEMENT A COMPOSITION COMPRISING (A) WATER, (B) POLYVINYL ALCOHOL HAVING A MOLECULAR WEIGHT SUCH THAT A 4 PERCENT BY WEIGHT AQEUOUS SOLUTION HAS A VISCOSITY AT 20*C. OF FROM 3 TO 65 CENTIPOISES, AND (C) BORATE IONS, THE PARTICULAR AMOUNT OF POLYVINYL ALCOHOL AND THE PARTICULAR AMOUNT OF BORATE IONS BEING SELECTED SUCH THAT THE COMPOSITION POSSESSES VISCOELASTIC SHEAR THICKENING PROPERTIES, WHEREBY SAID CAKE OF SAID GELLED DRILLING MUD IS DISPLACED WITHIN SAID WELL.
Claim 2
Dependent Claim
129 words
IN A METHOD OF CEMENTING A WELL IN THE EARTH WHEREIN CEMENT IS PASSED INTO SAID WELL, SAID WELL HAVING BEEN DRILLED EMPLOYING A DRILLING MUD CONTAINING A LIQUID PHASE AND A SOLID CONSTITUENT AND A CAKE OF GELLED DRILLING MUD REMAINS IN SAID WELL, THE STEP COMPRISING PASSING INTO SAID WELL PRIOR TO SAID CEMENT A COMPOSITION COMPRISING (A) WATER, (B) POLYVINYL ALCOHOL HAVING A MOLECULAR WEIGHT SUCH THAT A 4 PERCENT BY WEIGHT AQEUOUS SOLUTION HAS A VISCOSITY AT 20*C. OF FROM 3 TO 65 CENTIPOISES, AND (C) BORATE IONS, THE PARTICULAR AMOUNT OF POLYVINYL ALCOHOL AND THE PARTICULAR AMOUNT OF BORATE IONS BEING SELECTED SUCH THAT THE COMPOSITION POSSESSES VISCOELASTIC SHEAR THICKENING PROPERTIES, WHEREBY SAID CAKE OF SAID GELLED DRILLING MUD IS DISPLACED WITHIN SAID WELL.
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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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |