Patent US3131767A successfully refreshed from Google Patents.
US3131767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stage collar
Assignee: Individual
•
Filing: 1962-04-24
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Granted: 1964-05-05
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Expires: 1982-04-24
Abstract
No abstract record available.
Inventors
- 👤 Forrest E Chancellor
- 👤 Robert O Chancellor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:21
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/136; E21B34/00; E21B34/06; E21B34/14; E21B34/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
IN A CEMENTING TOOL COMPRISING A CONNECTING LINK IN A STRING OF WELL CASING, THE COMBINATION OF: A TUBULAR BODY MEMBER COMPRISING A RELATIVELY SHORT LENGTH OF SAID CASING, SAID MEMBER HAVING A SMOOTH CYLINDRICAL OUTER SURFACE, APERTURE MEANS BEING FORMED IN SAID MEMBER INCLUDING A PLURALITY OF EQUALLY CIRCUMFERENTIALLY SPACED VERTICAL SLOTS; A TUBULAR VALVE SLEEVE SLIDABLY FITTING SAID OUTER SURFACE OF SAID MEMBER, SAID SLEEVE BEING ENOUGH SHORTER THAN SAID MEMBER TO BE AXIALLY SHIFTABLE DOWNWARD THEREON TO EXPOSE AN UPPER PORTION OF SAID APERTURE MEANS, BUT LONG ENOUGH TO COVER ALL OF SAID APERTURE MEANS WHEN DISPOSED UPWARDLY OVER SAID EXPOSABLE UPPER PORTION OF SAID APERTURE MEANS; SHEAR PIN MEANS TEMPORARILY UNITING SAID MEMBER AND SAID SLEEVE, WITH THE LATTER LIFTED TO COVER ALL OF SAID APERTURE MEANS; AND PLUG RESPONSIVE MEANS SUPPORTED ON SAID SLEEVE AND EXTENDING INWARDLY THROUGH UPPER PORTIONS OF SAID SLOTS AND COOPERATING WITH A CEMENT PLUG PROPELLED HYDRAULICALLY DOWNWARD IN SAID CASING WHEN SAID PLUG COMES IN CONTACT THEREWITH, TO TRANSMIT HYDRAULIC PRESSURE DOWNWARDLY TO SAID SLEEVE, THEREBY SHEARING SAID SHEAR PIN MEANS, AND SHIFTING SAID SLEEVE DOWNWARD TO EXPOSE SAID UPPER PORTION OF SAID APERTURE MEANS AND ALLOW A CHARGE OF LIQUID CEMENT FOLLOWING SAID PLUG TO PASS OUTWARDLY THROUGH SAID EXPOSED UPPER PORTION OF SAID APERTURE MEANS.
Claim 2
Dependent Claim
217 words
IN A CEMENTING TOOL COMPRISING A CONNECTING LINK IN A STRING OF WELL CASING, THE COMBINATION OF: A TUBULAR BODY MEMBER COMPRISING A RELATIVELY SHORT LENGTH OF SAID CASING, SAID MEMBER HAVING A SMOOTH CYLINDRICAL OUTER SURFACE, APERTURE MEANS BEING FORMED IN SAID MEMBER INCLUDING A PLURALITY OF EQUALLY CIRCUMFERENTIALLY SPACED VERTICAL SLOTS; A TUBULAR VALVE SLEEVE SLIDABLY FITTING SAID OUTER SURFACE OF SAID MEMBER, SAID SLEEVE BEING ENOUGH SHORTER THAN SAID MEMBER TO BE AXIALLY SHIFTABLE DOWNWARD THEREON TO EXPOSE AN UPPER PORTION OF SAID APERTURE MEANS, BUT LONG ENOUGH TO COVER ALL OF SAID APERTURE MEANS WHEN DISPOSED UPWARDLY OVER SAID EXPOSABLE UPPER PORTION OF SAID APERTURE MEANS; SHEAR PIN MEANS TEMPORARILY UNITING SAID MEMBER AND SAID SLEEVE, WITH THE LATTER LIFTED TO COVER ALL OF SAID APERTURE MEANS; AND PLUG RESPONSIVE MEANS SUPPORTED ON SAID SLEEVE AND EXTENDING INWARDLY THROUGH UPPER PORTIONS OF SAID SLOTS AND COOPERATING WITH A CEMENT PLUG PROPELLED HYDRAULICALLY DOWNWARD IN SAID CASING WHEN SAID PLUG COMES IN CONTACT THEREWITH, TO TRANSMIT HYDRAULIC PRESSURE DOWNWARDLY TO SAID SLEEVE, THEREBY SHEARING SAID SHEAR PIN MEANS, AND SHIFTING SAID SLEEVE DOWNWARD TO EXPOSE SAID UPPER PORTION OF SAID APERTURE MEANS AND ALLOW A CHARGE OF LIQUID CEMENT FOLLOWING SAID PLUG TO PASS OUTWARDLY THROUGH SAID EXPOSED UPPER PORTION OF SAID APERTURE 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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |