Patent US3316971A successfully refreshed from Google Patents.
US3316971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand trap for use in well bores
Assignee: Individual
•
Filing: 1965-02-12
•
Granted: 1967-05-02
•
Expires: 1985-02-12
Abstract
No abstract record available.
Inventors
- 👤 Joe R Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:46
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/38; E21B43/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A DEVICE FOR TRAPPING DETRITUS SETTLING IN A WELL BORE, COMPRISING, A TUBULAR MANDREL CONNECTIBLE INTO A WELL PIPE STRING TO FORM A PART THEREOF, LONGITUDINALLY SPACED-APART UPPER AND LOWER ELONGATE GROOVE MEANS IN THE EXTERIOR OF SAID MANDREL, A NON-GROOVED CYLINDRICAL SEALING SECTION SEPARATING SAID UPPER AND LOWER GROOVE MEANS, AND UPWARDLY FACING CUP-SHAPED CATCHER ELEMENT SLIDABLY DISPOSED ON THE MANDREL FOR RELATIVE LONGITUDINAL MOVEMENT THEREON BETWEEN AN UPPER BY-PASS POSITION OPPOSITE SAID UPPER GROOVE MEANS, AN INTERMEDIATE POSITION ABOUT SAID SEALING SECTION, AND A LOWER BY-PASS POSITION OPPOSITE SAID LOWER GROOVE MEANS, A POSITIONING SLEEVE MEANS LONGITUDINALLY SLIDABLY DISPOSED ABOUT SAID MANDREL BELOW SAID CATCHER ELEMENT FOR MOVEMENT BETWEEN AN UPPER POSITION ADAPTED TO STOP SAID CATCHER ELEMENT AT SAID INTERMEDIATE POSITION AND A LOWER POSITION PERMITTING THE CATCHER ELEMENT TO ATTAIN SAID LOWER BY-PASS POSITION, MEANS RESILIENTLY BIASING SAID SLEEVE MEANS TOWARD SAID UPPER POSITION, AND MEANS LIMITING RELATIVE UPWARD MOVEMENT OF SAID CATCHER ELEMENT TO SAID UPPER BY-PASS POSITION.
Claim 2
Independent Claim
163 words
A DEVICE FOR TRAPPING DETRITUS SETTLING IN A WELL BORE, COMPRISING, A TUBULAR MANDREL CONNECTIBLE INTO A WELL PIPE STRING TO FORM A PART THEREOF, LONGITUDINALLY SPACED-APART UPPER AND LOWER ELONGATE GROOVE MEANS IN THE EXTERIOR OF SAID MANDREL, A NON-GROOVED CYLINDRICAL SEALING SECTION SEPARATING SAID UPPER AND LOWER GROOVE MEANS, AND UPWARDLY FACING CUP-SHAPED CATCHER ELEMENT SLIDABLY DISPOSED ON THE MANDREL FOR RELATIVE LONGITUDINAL MOVEMENT THEREON BETWEEN AN UPPER BY-PASS POSITION OPPOSITE SAID UPPER GROOVE MEANS, AN INTERMEDIATE POSITION ABOUT SAID SEALING SECTION, AND A LOWER BY-PASS POSITION OPPOSITE SAID LOWER GROOVE MEANS, A POSITIONING SLEEVE MEANS LONGITUDINALLY SLIDABLY DISPOSED ABOUT SAID MANDREL BELOW SAID CATCHER ELEMENT FOR MOVEMENT BETWEEN AN UPPER POSITION ADAPTED TO STOP SAID CATCHER ELEMENT AT SAID INTERMEDIATE POSITION AND A LOWER POSITION PERMITTING THE CATCHER ELEMENT TO ATTAIN SAID LOWER BY-PASS POSITION, MEANS RESILIENTLY BIASING SAID SLEEVE MEANS TOWARD SAID UPPER POSITION, AND MEANS LIMITING RELATIVE UPWARD MOVEMENT OF SAID CATCHER ELEMENT TO SAID UPPER BY-PASS POSITION.
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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |