US3353604A
Expired / Lapsed
US
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Treatment of subsurface earthen formations
Assignee: Schlumberger Technology Corp
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Filing: 1965-10-13
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Granted: 1967-11-21
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Expires: 1985-10-13
Abstract
No abstract record available.
Inventors
- 👤 Daniel L Gibson
- 👤 Louis H Eilers
- 👤 Samuel R West
- 👤 Clare H Kucera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; C09K8/74
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
THE METHOD OF FRACTURING SUBSURFACE FLUID-BEARING FORMATIONS PENETRATED BY A WELLBORE COMPRISING INJECTING DOWN THE WELLBORE AND INTO THE FORMATION AN AQUEOUS FLUID CONTAINING DISPERSED THEREIN AN EFFECTIVE AMOUNT OF AN ALDEHYDE POLYMER SELECTED FROM THE CLASS CONSISTING OF PARAFORMALDEHYDE, METALDEHYDE, AND TRIOXANE TO SERVE AS A TEMPORARY PLUGGING AGENT OF CHANNELS IN THE MORE ACCESSIBLE PARTS OF THE FORMATION AND SUBSEQUENTLY INJECTING AT GREATER THAN FRACTURING PRESSURE AN AQUEOUS FLUID CONTAINING LITTLE OR NO ALDEHYDE POLYMER INTO THE FORMATION THE FLUID THEREBY BEING DIVERTED TO THE LESS ACCESSIBLE PORTIONS OF THE FORMATION.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |