US3295604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting multiple tubular conduits
Assignee: Servco Co
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Filing: 1964-07-10
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Granted: 1967-01-03
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Expires: 1984-07-10
Abstract
No abstract record available.
Inventors
- 👤 Bruce J Cordary
- 👤 Robert W Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:11
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/002; E21B29/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
AN APPARATUS FOR SEQUENTIALLY CUTTING AN INNER TUBULAR CONDUIT AND AT LEAST ONE LARGER OUTER TUBULAR CONDUIT DISPOSED IN A WELL BORE COMPRISING: (A) A TOOL BODY ADAPTED TO BE SECURED TO A DRILL STRING AND HAVING AN AXIAL BORE; (B) ONE PISTON RECIPROCABLY AND SLIDABLY MOVABLE WITHIN THE BORE IN THE TOOL BODY AND HAVING A SURFACE EXPOSED TO FLUID PRESSURE IN THE BORE; (C) A SECOND PISTON HAVING A SURFACE EXPOSED TO THE SAME FLUID PRESSURE; (I) THE CROSS-SECTIONAL AREA OF SAID SURFACE OF THE FIRST PISTON BEING SMALLER THAN THE CROSSSECTIONAL AREA OF SAID SURFACE OF THE SECOND PISTON; (D) AT LEAST ONE CUTTER PIVOTALLY JOINED AT ONE OF THE ENDS TO THE TUBULAR BODY; (E) INNTERCONNECTING MEANS HINGEABLY SECURED AT ITS OPPOSITE ENDS TO THE OTHER END OF THE CUTTER AND TO ONE OF THE TWO PISTONS; (F) MEANS ON THE OTHER OF THE TWO PISTONS FOR ENGAGING THE INTERCONNECTING MEANS UPON MOVEMENT OF SAID OTHER PISTON AND THEREBY TO MOVE THE CUTTER OUTWARDLY TOWARD THE INNER TUBULAR CONDUIT;
Claim 2
Independent Claim
173 words
AN APPARATUS FOR SEQUENTIALLY CUTTING AN INNER TUBULAR CONDUIT AND AT LEAST ONE LARGER OUTER TUBULAR CONDUIT DISPOSED IN A WELL BORE COMPRISING: (A) A TOOL BODY ADAPTED TO BE SECURED TO A DRILL STRING AND HAVING AN AXIAL BORE; (B) ONE PISTON RECIPROCABLY AND SLIDABLY MOVABLE WITHIN THE BORE IN THE TOOL BODY AND HAVING A SURFACE EXPOSED TO FLUID PRESSURE IN THE BORE; (C) A SECOND PISTON HAVING A SURFACE EXPOSED TO THE SAME FLUID PRESSURE; (I) THE CROSS-SECTIONAL AREA OF SAID SURFACE OF THE FIRST PISTON BEING SMALLER THAN THE CROSSSECTIONAL AREA OF SAID SURFACE OF THE SECOND PISTON; (D) AT LEAST ONE CUTTER PIVOTALLY JOINED AT ONE OF THE ENDS TO THE TUBULAR BODY; (E) INNTERCONNECTING MEANS HINGEABLY SECURED AT ITS OPPOSITE ENDS TO THE OTHER END OF THE CUTTER AND TO ONE OF THE TWO PISTONS; (F) MEANS ON THE OTHER OF THE TWO PISTONS FOR ENGAGING THE INTERCONNECTING MEANS UPON MOVEMENT OF SAID OTHER PISTON AND THEREBY TO MOVE THE CUTTER OUTWARDLY TOWARD THE INNER TUBULAR CONDUIT;
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |