US3174548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination washover tool, pipe cutter and retriever
Assignee: Houston Engineers Inc
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Filing: 1963-09-06
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Granted: 1965-03-23
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Expires: 1983-09-06
Abstract
No abstract record available.
Inventors
- 👤 Derrel D Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:47
CPC Classifications
E; E21; E21B; E21B31/00; E21B31/12; E21B31/18; E21B29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A COMBINATION WASHOVER TOOL, A PIPE CUTTER AND RETRIEVER COMPRISING AN UPPER TUBULAR BODY, A LOWER TUBULAR BODY REMOVABLY SECURED TO THE LOWER END OF SAID UPPER BODY, AN ANNULAR CUTTER REMOVABLY SECURED TO THE LOWER END OF SAID LOWER BODY, MEANS FOR CONNECTING SAID TOOL TO A WASHOVER PIPE STRING, A PLURALITY OF CIRCUMFERENTIALLY SPACED INWARDLY EXTENDING LUGS INTERMEDIATE THE LENGTH OF SAID UPPER BODY, A SLEEVE DISPOSED IN SAID UPPER BODY AND HAVING SLOTS SLIDABLY RECEIVING SAID LUGS, A THRUST BEARING DISPOSED ON THE UPPER END OF SAID SLEEVE, A TUBULAR DOG CAGE SLIDABLY RECEIVED IN THE UPPER PORTION OF SAID UPPER BODY AND SUPPORTED BY SAID BEARING, THE WALL OF SAID CAGE HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED LONGITUDINALLY EXTENDING RECESSES, AN ELONGATED PIPE COLLAR ENGAGING DOG PIVOTALLY MOUNTED FOR MOVEMENT INTO AND OUT OF EACH RECESS, MEANS FOR URGING SAID DOGS INWARDLY OUT OF SAID RECESSES, MEANS TO PREVENT RELATIVE ROTATION BETWEEN SAID CAGE AND SAID UPPER BODY IN ONE DIRECTION BUT PERMITTING RELATIVE ROTATION IN THE OPPOSITE DIRECTION, CIRCUMFERENTIALLY SPACED CUTTER RECEIVING
Claim 2
Dependent Claim
177 words
A COMBINATION WASHOVER TOOL, A PIPE CUTTER AND RETRIEVER COMPRISING AN UPPER TUBULAR BODY, A LOWER TUBULAR BODY REMOVABLY SECURED TO THE LOWER END OF SAID UPPER BODY, AN ANNULAR CUTTER REMOVABLY SECURED TO THE LOWER END OF SAID LOWER BODY, MEANS FOR CONNECTING SAID TOOL TO A WASHOVER PIPE STRING, A PLURALITY OF CIRCUMFERENTIALLY SPACED INWARDLY EXTENDING LUGS INTERMEDIATE THE LENGTH OF SAID UPPER BODY, A SLEEVE DISPOSED IN SAID UPPER BODY AND HAVING SLOTS SLIDABLY RECEIVING SAID LUGS, A THRUST BEARING DISPOSED ON THE UPPER END OF SAID SLEEVE, A TUBULAR DOG CAGE SLIDABLY RECEIVED IN THE UPPER PORTION OF SAID UPPER BODY AND SUPPORTED BY SAID BEARING, THE WALL OF SAID CAGE HAVING A PLURALITY OF CIRCUMFERENTIALLY SPACED LONGITUDINALLY EXTENDING RECESSES, AN ELONGATED PIPE COLLAR ENGAGING DOG PIVOTALLY MOUNTED FOR MOVEMENT INTO AND OUT OF EACH RECESS, MEANS FOR URGING SAID DOGS INWARDLY OUT OF SAID RECESSES, MEANS TO PREVENT RELATIVE ROTATION BETWEEN SAID CAGE AND SAID UPPER BODY IN ONE DIRECTION BUT PERMITTING RELATIVE ROTATION IN THE OPPOSITE DIRECTION, CIRCUMFERENTIALLY SPACED CUTTER RECEIVING
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) | 1968-03-22 | 1968-09-21 | 1969-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-22 | 1972-09-21 | 1973-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-22 | 1976-09-21 | 1977-03-23 | $7700.00 | Window Closed / Lapsed |