Patent US3122811A successfully refreshed from Google Patents.
US3122811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic slip setting apparatus
Assignee: Individual
•
Filing: 1962-06-29
•
Granted: 1964-03-03
•
Expires: 1982-06-29
Abstract
No abstract record available.
Inventors
- 👤 Lafayette E Gilreath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:11
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A HYDRAULIC SLIP SETTING APPARATUS FOR GRIPPING WELL PIPE WITH A PIPE SLIP BY A FORCE THAT INCREASES WITH AN INCREASE IN THE WEIGHT OF THE DRILL PIPE COMPRISING, A HOUSING, SAID HOUSING HAVING A TAPERED FACE FOR ENGAGING AND SUPPORTING SAID PIPE SLIP, YIELDABLE MEANS ENGAGING AND YIELDABLY SUPPORTING SAID HOUSING, A FIRST PISTON AND COACTING CYLINDER ENGAGING AND SUPPORTING THE HOUSING WHEREBY SAID PISTON MOVES INTO SAID CYLINDER ON DOWNWARD MOVEMENT OF SAID HOUSING, SLIP ENGAGING MEANS SLIDABLY CARRIED BY THE HOUSING ADJACENT SAID TAPERED FACE AND ADAPTED TO ENGAGE SAID SLIP, A SECOND PISTON AND COACTING CYLINDER CONNECTED TO SAID SLIP ENGAGING MEANS,
Claim 2
Dependent Claim
106 words
A HYDRAULIC SLIP SETTING APPARATUS FOR GRIPPING WELL PIPE WITH A PIPE SLIP BY A FORCE THAT INCREASES WITH AN INCREASE IN THE WEIGHT OF THE DRILL PIPE COMPRISING, A HOUSING, SAID HOUSING HAVING A TAPERED FACE FOR ENGAGING AND SUPPORTING SAID PIPE SLIP, YIELDABLE MEANS ENGAGING AND YIELDABLY SUPPORTING SAID HOUSING, A FIRST PISTON AND COACTING CYLINDER ENGAGING AND SUPPORTING THE HOUSING WHEREBY SAID PISTON MOVES INTO SAID CYLINDER ON DOWNWARD MOVEMENT OF SAID HOUSING, SLIP ENGAGING MEANS SLIDABLY CARRIED BY THE HOUSING ADJACENT SAID TAPERED FACE AND ADAPTED TO ENGAGE SAID SLIP, A SECOND PISTON AND COACTING CYLINDER CONNECTED TO SAID SLIP ENGAGING MEANS,
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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |