US2888988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating earth formations
Assignee: Dow Chemical Co
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Filing: 1957-03-19
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Granted: 1959-06-02
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Expires: 1977-03-19
Abstract
No abstract record available.
Inventors
- 👤 William H Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF PREVENTING SCREEN-OUTS DURING THE INJECTION INTO AN EARTH FORMATION PENETRATED BY A WELL BORE HAVING CASING AND TUBING DISPOSED CONCENTRICALLY THEREIN OF A SLURRY OF PARTICULATED MATERIAL IN A FLUID CARRYING AGENT, COMPRISING, WHEN RISE IN INJECTION PRESSURE OCCURS WHICH INDICATES THE BEGINNING OF A SCREEN OUT, PUMPING A DILUENT WHICH IS FREE FROM PARTICULATED MATERIAL INTO SAID WELL BORE AT A LOCATION WHICH IS DIRECTLY ADJACENT TO THE POINT OF ENTRY OF SAID SLURRY INTO SAID FORMATION WHEREBY DILUTE THE AMOUNT OF PARTICULATED MATERIAL PER UNIT VOLUME OF CARRYING AGENT ENTERING SAID FORMATION.
Claim 2
Independent Claim
97 words
THE METHOD OF PREVENTING SCREEN-OUTS DURING THE INJECTION INTO AN EARTH FORMATION PENETRATED BY A WELL BORE HAVING CASING AND TUBING DISPOSED CONCENTRICALLY THEREIN OF A SLURRY OF PARTICULATED MATERIAL IN A FLUID CARRYING AGENT, COMPRISING, WHEN RISE IN INJECTION PRESSURE OCCURS WHICH INDICATES THE BEGINNING OF A SCREEN OUT, PUMPING A DILUENT WHICH IS FREE FROM PARTICULATED MATERIAL INTO SAID WELL BORE AT A LOCATION WHICH IS DIRECTLY ADJACENT TO THE POINT OF ENTRY OF SAID SLURRY INTO SAID FORMATION WHEREBY DILUTE THE AMOUNT OF PARTICULATED MATERIAL PER UNIT VOLUME OF CARRYING AGENT ENTERING SAID FORMATION.
References Cited (Backward Citations)
US2354570A
Cited
US2815815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |