US3354959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fracturing with spaced props
Assignee: Pan American Petroleum Corp
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Filing: 1965-11-19
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Granted: 1967-11-28
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Expires: 1985-11-19
Abstract
No abstract record available.
Inventors
- 👤 Clarence R Fast
- 👤 George C Howard
- 👤 Fredrick H Rixe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:15
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF FRACTURING A SUBSURFACE EARTH FORMATTION PENETRATED BY A WELL IN WHICH METHOD A LIQUID IS FORCED DOWN A WELL UNDER SUFFICIENT PRESSURE TO FRACTURE SAID FORMATION, AND IN WHICH FRACTURE PROPPING PARTICLES ARE INCLUDED IN SAID LIQUID TOGETHER WITH TEMPORARY PARTICLES FOR SPACING SID PROPS APART, AND IN WHICH THE DENSITY OF ONE TYPE OF PARTICLE IS FROM ABOUT 1.1 TO ABOUT 1.4 TIMES THE DENSITY OF THE OTHER TYPE OF PARTICLE, THE IMPROVEMENT COMRPISING USE OF SPACER PARTICLES HAVING A DIAMETER DS IN THE EXPRESSION
Claim 2
Independent Claim
89 words
A METHOD OF FRACTURING A SUBSURFACE EARTH FORMATTION PENETRATED BY A WELL IN WHICH METHOD A LIQUID IS FORCED DOWN A WELL UNDER SUFFICIENT PRESSURE TO FRACTURE SAID FORMATION, AND IN WHICH FRACTURE PROPPING PARTICLES ARE INCLUDED IN SAID LIQUID TOGETHER WITH TEMPORARY PARTICLES FOR SPACING SID PROPS APART, AND IN WHICH THE DENSITY OF ONE TYPE OF PARTICLE IS FROM ABOUT 1.1 TO ABOUT 1.4 TIMES THE DENSITY OF THE OTHER TYPE OF PARTICLE, THE IMPROVEMENT COMRPISING USE OF SPACER PARTICLES HAVING A DIAMETER DS IN THE EXPRESSION
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |