US3379255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutoff assembly for use at wellheads
Assignee: Bowen Tools Inc
•
Filing: 1966-07-28
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Granted: 1968-04-23
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Expires: 1986-07-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert L Burns
- 👤 Damon T Slator
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:40
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/08; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B33/061; E21B33/062; E21B33/063; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8821; Y10T83/8858
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A CUTOFF ASSEMBLY FOR USE AT WELLHEADS, COMPRISING: (A) A HOUSING HAVING (1) A WELLHEAD BODY WITH A LONGITUDINALLY-EXTENDING BORE THROUGH WHICH A WELL PIPE OR THE LIKE IS ADAPTED TO EXTEND, AND (2) A HYDRAULIC CYLINDER DISPOSED LATERALLY WITH RESPECT TO SAID LONGITUDINALLY-EXTENDING BORE, (B) A FIRST PISTON SLIDABLY DISPOSED IN SAID CYLINDER FOR MOVEMENT TOWARDS AND AWAY FROM THE SAID BORE, (C) A CUTTER BLADE CONNECTED TO SAID FIRST PISTON FOR MOVEMENT THEREWITH FOR CUTTING THE PIPE OR THE LIKE IN THE LONGITUDINALLY-EXTENDING BORE, (D) A SECOND PISTON SLIDABLY DISPOSED IN SAID CYLINDER FOR MOVEMENT TOWARDS AND AWAY FROM SAID BORE, AND (E) A STABILIZER CONNECTED TO AND MOVABLE WITH SAID SECOND PISTON FOR ENGAGEMENT WITH THE EXTERNAL SURFACE OF THE WELL PIPE TO STABILIZE THE PIPE WHILE CUTTING SAME.
Claim 2
Dependent Claim
132 words
A CUTOFF ASSEMBLY FOR USE AT WELLHEADS, COMPRISING: (A) A HOUSING HAVING (1) A WELLHEAD BODY WITH A LONGITUDINALLY-EXTENDING BORE THROUGH WHICH A WELL PIPE OR THE LIKE IS ADAPTED TO EXTEND, AND (2) A HYDRAULIC CYLINDER DISPOSED LATERALLY WITH RESPECT TO SAID LONGITUDINALLY-EXTENDING BORE, (B) A FIRST PISTON SLIDABLY DISPOSED IN SAID CYLINDER FOR MOVEMENT TOWARDS AND AWAY FROM THE SAID BORE, (C) A CUTTER BLADE CONNECTED TO SAID FIRST PISTON FOR MOVEMENT THEREWITH FOR CUTTING THE PIPE OR THE LIKE IN THE LONGITUDINALLY-EXTENDING BORE, (D) A SECOND PISTON SLIDABLY DISPOSED IN SAID CYLINDER FOR MOVEMENT TOWARDS AND AWAY FROM SAID BORE, AND (E) A STABILIZER CONNECTED TO AND MOVABLE WITH SAID SECOND PISTON FOR ENGAGEMENT WITH THE EXTERNAL SURFACE OF THE WELL PIPE TO STABILIZE THE PIPE WHILE CUTTING SAME.
References Cited (Backward Citations)
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Cited
US1802564A
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US1802565A
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US1875673A
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US2919111A
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US2969838A
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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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |