Patent US3267518A successfully refreshed from Google Patents.
Patent US3605899A successfully refreshed from Google Patents.
US3605899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of increasing permeability of cement packs
Assignee: Texaco Inc
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Filing: 1969-11-28
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Granted: 1971-09-20
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Expires: 1989-11-28
Abstract
Abstract Permeability of a cement pack containing acid-soluble materials in a wellbore traversing a producing formation is improved by the controlled generation in situ of a halogenated acid whereby acid-soluble materials accumulated at the pack face and within the cement pack are dissolved and the flow of fluids therethrough is facilitated, without substantially weakening the mechanical strength of the cement pack.
Inventors
- 👤 Jack F Tate
- 👤 Thomas E Sample Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:52
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |