US2707436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fracturing subsurface formations
Assignee: Individual
•
Filing: 1950-08-17
•
Granted: 1955-05-03
•
Expires: 1970-08-17
Abstract
No abstract record available.
Inventors
- 👤 Hugh D Mccool
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:42
CPC Classifications
F; F42; F42D; F42D1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD OF FRACTURING A SUBSURFACE FORMATION SURROUNDING A BOREHOLE WHICH COMPRISES THE STEPS OF LOWERING AN EXPLOSIVE CHARGE INTO THE BOREHOLE AND PLACING SAID CHARGE ADJACENT SAID FORMATION; SETTING A PACK-OFF ELEMENT IN THE BOREHOLE ABOVE SAID EXPLOSIVE CHARGE AND ADJACENT THERETO TO DIVIDE FLUIDLY SAID BOREHOLE INTO AN UPPER PORTION AND A LOWER PORTION; INTRODUCING INTO THE UPPER PORTION OF SAID BOREHOLE A MATERIAL WHICH IS NORMALLY FLUID AT THE TEMPERATURE PREVAILING IN THE BOREHOLE BUT WHICH IS CAPABLE OF BEING CONVERTED TO A SOLID BY COOLING TO FORM A COLUMN OF MATERIAL STANDING THEREIN, SAID SOLID BEING MELTABLE BY THE HEAT OF THE BOREHOLE; REDUCING THE TEMPERATURE OF AT LEAST THAT PORTION OF SAID COLUMN ADJACENT SAID PACK-OFF
Claim 2
Independent Claim
121 words
A METHOD OF FRACTURING A SUBSURFACE FORMATION SURROUNDING A BOREHOLE WHICH COMPRISES THE STEPS OF LOWERING AN EXPLOSIVE CHARGE INTO THE BOREHOLE AND PLACING SAID CHARGE ADJACENT SAID FORMATION; SETTING A PACK-OFF ELEMENT IN THE BOREHOLE ABOVE SAID EXPLOSIVE CHARGE AND ADJACENT THERETO TO DIVIDE FLUIDLY SAID BOREHOLE INTO AN UPPER PORTION AND A LOWER PORTION; INTRODUCING INTO THE UPPER PORTION OF SAID BOREHOLE A MATERIAL WHICH IS NORMALLY FLUID AT THE TEMPERATURE PREVAILING IN THE BOREHOLE BUT WHICH IS CAPABLE OF BEING CONVERTED TO A SOLID BY COOLING TO FORM A COLUMN OF MATERIAL STANDING THEREIN, SAID SOLID BEING MELTABLE BY THE HEAT OF THE BOREHOLE; REDUCING THE TEMPERATURE OF AT LEAST THAT PORTION OF SAID COLUMN ADJACENT SAID PACK-OFF
References Cited (Backward Citations)
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Cited
US2031084A
Cited
US2033560A
Cited
US2145473A
Cited
US2191652A
Cited
US2330110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |