US3211227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Release mechanism for well equipment
Assignee: Individual
•
Filing: 1962-06-27
•
Granted: 1965-10-12
•
Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 James D Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:50
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
FOR USE WITH A WELL EQUIPMENT POSITIONED IN A WELL BORE AND ADAPTED TO BE ANCHORED THEREIN, SAID EQUIPMENT INCLUDING A TUBULAR BODY HAVING AN AXIAL BORE, MEANS MOUNTED ON THE BODY FOR ANCHORING SAID BODY TO THE WALL OF THE WELL BORE, AND A TUBULAR RELEASE MANDREL SLIDABLY DISPOSED IN SAID AXIAL BORE, A STRAIGHT-PULL RELEASE MECHANISM FOR RELEASING SAID MANDREL FROM SAID BODY, COMPRISING FRANGIBLE MEANS SECURING THE MANDREL TO THE BODY AND RELEASABLE THEREFROM BY UPWARD FORCE ON THE MANDREL, AND MEANS FOR COUNTERBALANCING FLUID PRESSURES INTERNALLY AND EXTERNALLY OF SAID BODY WHICH TEND TO EXERT UPWARD FORCE ON THE MANDREL, SAID LAST MENTIONED MEANS COMPRISING COOPERATING DIFFERENTIAL PRESSURE-ACTUATABLE AREAS CARRIED BY THE MANDREL AND BODY EXPOSED TO DIFFERENTIALS IN SAID FLUID PRESSUERS ACROSS SAID BODY AND CONSTRUCTED AND ARRANGED TO DIRECT THE FORCE OF SAID FLUID PRESSURE DIFFERENTIALS DOWNWARDLY ON SAID MANDREL.
Claim 2
Dependent Claim
146 words
FOR USE WITH A WELL EQUIPMENT POSITIONED IN A WELL BORE AND ADAPTED TO BE ANCHORED THEREIN, SAID EQUIPMENT INCLUDING A TUBULAR BODY HAVING AN AXIAL BORE, MEANS MOUNTED ON THE BODY FOR ANCHORING SAID BODY TO THE WALL OF THE WELL BORE, AND A TUBULAR RELEASE MANDREL SLIDABLY DISPOSED IN SAID AXIAL BORE, A STRAIGHT-PULL RELEASE MECHANISM FOR RELEASING SAID MANDREL FROM SAID BODY, COMPRISING FRANGIBLE MEANS SECURING THE MANDREL TO THE BODY AND RELEASABLE THEREFROM BY UPWARD FORCE ON THE MANDREL, AND MEANS FOR COUNTERBALANCING FLUID PRESSURES INTERNALLY AND EXTERNALLY OF SAID BODY WHICH TEND TO EXERT UPWARD FORCE ON THE MANDREL, SAID LAST MENTIONED MEANS COMPRISING COOPERATING DIFFERENTIAL PRESSURE-ACTUATABLE AREAS CARRIED BY THE MANDREL AND BODY EXPOSED TO DIFFERENTIALS IN SAID FLUID PRESSUERS ACROSS SAID BODY AND CONSTRUCTED AND ARRANGED TO DIRECT THE FORCE OF SAID FLUID PRESSURE DIFFERENTIALS DOWNWARDLY ON SAID MANDREL.
References Cited (Backward Citations)
US2671512A
Cited
US3080923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |