US3106959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fracturing a subsurface formation
Assignee: Gulf Research and Development Co
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Filing: 1960-04-15
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Granted: 1963-10-15
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Expires: 1980-04-15
Abstract
No abstract record available.
Inventors
- 👤 Jimmie L Huitt
- 👤 Bruce B Mcglothlin
- 👤 Joseph L Pekarek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:46
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF CREATING FRACTURES AT PREDETERMINED DEPTH AND ORIENTATION IN AN EARTH FORMATION PENETRATED BY A WELL BORE WHICH COMPRISES: PLACING WITHIN SAID WELL BORE A PIPE STRING HAVING THEREIN A REMOVABLE PIPE SECTION WHICH PROJECTS OUTWARDLY BEYOND THE CIRCUMFERENCE OF THE PIPE STRING AND WHICH IS COMPOSED OF A MATERIAL CONVERTIBLE TO A LIQUID UNDER CONDITIONS LEAVING THE REMAINDER OF THE PIPE STRING SUBSTANTIALLY UNAFFECTED, SAID REMOVABLE PIPE SECTION BEING TAPERED TO A REDUCED THICKNESS AT THE OUTER PROJECTING EDGE THEREOF, CEMENTING THE PIPE STRING IN PLACE SO THAT THE SAID REMOVABLE SECTION THEREOF IS OPPOSITE THE EARTH FORMATION IN WHICH A FRACTURE IS DESIRED, CONVERTING THE SECTION OF PIPE TO A LIQUID WHEREBY SAID SECTION OF PIPE IS REMOVED TO EXPOSE A SECTION OF THE CEMENT SHEATH IN WHICH THERE IS LOCATED A NOTCH CORRESPONDING SUBSTANTIALLY IN SIZE AND SHAPE TO THE REMOVABLE OUTWARDLY PROJECTING PIPE SECTION, AND THEN INJECTING A FLUID INTO SAID WELL BORE UNDER PRESSURE SUFFICIENT TO RUPTURE THE CEMENT SHEATH AND TO FRACTURE THE FORMATION AT THE LOCATION OF THE SAID NOTCH.
Claim 2
Independent Claim
179 words
A METHOD OF CREATING FRACTURES AT PREDETERMINED DEPTH AND ORIENTATION IN AN EARTH FORMATION PENETRATED BY A WELL BORE WHICH COMPRISES: PLACING WITHIN SAID WELL BORE A PIPE STRING HAVING THEREIN A REMOVABLE PIPE SECTION WHICH PROJECTS OUTWARDLY BEYOND THE CIRCUMFERENCE OF THE PIPE STRING AND WHICH IS COMPOSED OF A MATERIAL CONVERTIBLE TO A LIQUID UNDER CONDITIONS LEAVING THE REMAINDER OF THE PIPE STRING SUBSTANTIALLY UNAFFECTED, SAID REMOVABLE PIPE SECTION BEING TAPERED TO A REDUCED THICKNESS AT THE OUTER PROJECTING EDGE THEREOF, CEMENTING THE PIPE STRING IN PLACE SO THAT THE SAID REMOVABLE SECTION THEREOF IS OPPOSITE THE EARTH FORMATION IN WHICH A FRACTURE IS DESIRED, CONVERTING THE SECTION OF PIPE TO A LIQUID WHEREBY SAID SECTION OF PIPE IS REMOVED TO EXPOSE A SECTION OF THE CEMENT SHEATH IN WHICH THERE IS LOCATED A NOTCH CORRESPONDING SUBSTANTIALLY IN SIZE AND SHAPE TO THE REMOVABLE OUTWARDLY PROJECTING PIPE SECTION, AND THEN INJECTING A FLUID INTO SAID WELL BORE UNDER PRESSURE SUFFICIENT TO RUPTURE THE CEMENT SHEATH AND TO FRACTURE THE FORMATION AT THE LOCATION OF THE SAID NOTCH.
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) | 1966-10-14 | 1967-04-15 | 1967-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-14 | 1971-04-15 | 1971-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-14 | 1975-04-15 | 1975-10-15 | $7700.00 | Window Closed / Lapsed |