US2811207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of vertically fracturing formations in wells
Assignee: ConocoPhillips Co
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Filing: 1955-01-26
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Granted: 1957-10-29
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Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Roscoe C Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:12
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
THE METHOD OF EFFECTING A VERTICALLY EXTENDING FRACTURE IN A LAYER SUBSURFACE FORMATION PENETRATED BY A WELL BORE WHICH COMPRISES FORMING AN IMPERMEABLE SHEATH ON THE SURFACE OF THE WELL BORE BY PUMPING A FLUID MASS INTO THE WELL BORE IN THE AREA OF SAID FORMATION, SAID FLUID MASS POSSESSING A FLUID LOSS OF LESS THAN 5 CC. IN 30 MINUTES AS DETERMINED BY AN API RP NO. 29 TEST CONDUCTED AT A TEMPERATURE WITHIN THE RANGE OF FROM 90 TO 350*C., ALTERNATELY PUMPING AND STOPPING THE FLOW OF A SECOND FLUID MASS INTO THE WELL BORE, THUS GRADUALLY INCREASING THE HYDROSTATIC PRESSURE UPON SAID FIRST MENTIONED FLUID MASS UNTIL THE PRESSURE DROP OVER AN HOUR''S TIME AFTER THE FLOW OF THE SAID SECOND MENTIONED FLUID CEASES DOES NOT EXCEED 5 PERCENT OF THE HYDROSTATIC PRESSURE REACHED DURING THE PUMPING OPERATION AND THEN RAPIDLY INCREASING THE HYDROSTATIC PRESSURE ON SAID FIRST MENTIONED FLUID MASS UNTIL SAID FORMATION IS FRACTURED.
Claim 2
Independent Claim
159 words
THE METHOD OF EFFECTING A VERTICALLY EXTENDING FRACTURE IN A LAYER SUBSURFACE FORMATION PENETRATED BY A WELL BORE WHICH COMPRISES FORMING AN IMPERMEABLE SHEATH ON THE SURFACE OF THE WELL BORE BY PUMPING A FLUID MASS INTO THE WELL BORE IN THE AREA OF SAID FORMATION, SAID FLUID MASS POSSESSING A FLUID LOSS OF LESS THAN 5 CC. IN 30 MINUTES AS DETERMINED BY AN API RP NO. 29 TEST CONDUCTED AT A TEMPERATURE WITHIN THE RANGE OF FROM 90 TO 350*C., ALTERNATELY PUMPING AND STOPPING THE FLOW OF A SECOND FLUID MASS INTO THE WELL BORE, THUS GRADUALLY INCREASING THE HYDROSTATIC PRESSURE UPON SAID FIRST MENTIONED FLUID MASS UNTIL THE PRESSURE DROP OVER AN HOUR''S TIME AFTER THE FLOW OF THE SAID SECOND MENTIONED FLUID CEASES DOES NOT EXCEED 5 PERCENT OF THE HYDROSTATIC PRESSURE REACHED DURING THE PUMPING OPERATION AND THEN RAPIDLY INCREASING THE HYDROSTATIC PRESSURE ON SAID FIRST MENTIONED FLUID MASS UNTIL SAID FORMATION IS FRACTURED.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |