US3195636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cutting and milling in well bores
Assignee: Servco Co
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Filing: 1962-09-07
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Granted: 1965-07-20
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Expires: 1982-09-07
Abstract
No abstract record available.
Inventors
- 👤 Brace J Cordary
- 👤 Robert W Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:47
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/002; E21B29/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
AN APPARATUS FOR CUTTING AND MILLING A TUBULAR CONDUIT DISPOSED IN A WELL BORE COMPRISING: (A) A TUBULAR BODY ADAPTED TO BE SECURED TO A DRILL STRING AND HAVING A PASSAGE; (B) A PISTON RECIPROCABLY MOVABLE WITHIN THE PASSAGE; (C) A FIRST PLURALITY AND A SECOND PLURALITY OF CUTTER ARMS, EACH SECURED TO THE TUBULAR BODY AND ADAPTED TO OCCUPY AN RETRACTED POSITION AND AN EXPANDED POSITION; (D) OPENINGS IN THE TUBULAR BODY ACCOMMODATING THE ARMS SO THAT A PORTION OF EACH ARM EXTENDS INWARDLY INTO THE PASSAGE; (E) EACH ARM HAVING MEANS ENGAGEABLE BY THE PISTON, (I) SAID MEANS ON THE FIRST PLURALITY AND THE SECOND PLURALITY OF CUTTER ARMS BEING SHAPED RELATIVE TO EACH OTHER SO THAT MOVEMENT OF THE PISTON SUCCESSIVELY ENGAGES SAID MEANS TO PRODUCE OUTWARD MOVEMENT OF THE FIRST PLURALITY OF ARMS TO THE EXPANDED POSITION TO OPERATIVELY ENGAGE THE TUBULAR CONDUIT AT AN INITIAL PRESELECTED LEVEL PRIOR TO OUTWARD MOVEMENT OF THE SECOND PLURALITY OF ARMS TO THE EXPANDED POSITION TO OPERATIVELY ENGAGE THE TUBULAR CONDUIT AT SUBSTANTIALLY THE SAME PRESELECTED LEVEL.
Claim 2
Independent Claim
178 words
AN APPARATUS FOR CUTTING AND MILLING A TUBULAR CONDUIT DISPOSED IN A WELL BORE COMPRISING: (A) A TUBULAR BODY ADAPTED TO BE SECURED TO A DRILL STRING AND HAVING A PASSAGE; (B) A PISTON RECIPROCABLY MOVABLE WITHIN THE PASSAGE; (C) A FIRST PLURALITY AND A SECOND PLURALITY OF CUTTER ARMS, EACH SECURED TO THE TUBULAR BODY AND ADAPTED TO OCCUPY AN RETRACTED POSITION AND AN EXPANDED POSITION; (D) OPENINGS IN THE TUBULAR BODY ACCOMMODATING THE ARMS SO THAT A PORTION OF EACH ARM EXTENDS INWARDLY INTO THE PASSAGE; (E) EACH ARM HAVING MEANS ENGAGEABLE BY THE PISTON, (I) SAID MEANS ON THE FIRST PLURALITY AND THE SECOND PLURALITY OF CUTTER ARMS BEING SHAPED RELATIVE TO EACH OTHER SO THAT MOVEMENT OF THE PISTON SUCCESSIVELY ENGAGES SAID MEANS TO PRODUCE OUTWARD MOVEMENT OF THE FIRST PLURALITY OF ARMS TO THE EXPANDED POSITION TO OPERATIVELY ENGAGE THE TUBULAR CONDUIT AT AN INITIAL PRESELECTED LEVEL PRIOR TO OUTWARD MOVEMENT OF THE SECOND PLURALITY OF ARMS TO THE EXPANDED POSITION TO OPERATIVELY ENGAGE THE TUBULAR CONDUIT AT SUBSTANTIALLY THE SAME PRESELECTED LEVEL.
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |