US3282348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circulating device
Assignee: Pan American Petroleum Corp
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Filing: 1963-06-03
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Granted: 1966-11-01
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Expires: 1983-06-03
Abstract
No abstract record available.
Inventors
- 👤 Wade J Artigue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:19
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/102; E21B34/103; E21B34/105; E21B23/00; E21B23/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A DOWN-HOLE CIRCULATING DEVICE WHICH COMPRISES: A SIDE-POCKET MANDREL ADAPTED TO BE POSITIONED IN A STRING OF WELL TUBING, FIRST PORT MEANS IN SAID MANDREL, COMMUNICATING THE SIDE POCKET OF SAID MANDREL WITH THE EXTERIOR OF SAID MANDREL, VALVE MEANS ADAPTED TO BE POSITIONED IN SAID SIDE POCKET, SAID VALVE MEANS COMPRISING AN ELONGATED MEMBER HAVING A LONGITUDINAL CAVITY THEREIN, LOWER CIRCULATING PORT MEANS AND UPPER CIRCULATING PORT MEANS IN COMMUNICATION WITH SAID CAVITY, CHECK VALVE MEANS POSITIONED BETWEEN SAID UPPER AND LOWER CIRCULATING PORT MEANS TO UNIDIRECTIONALLY CONTROL THE FLUID FLOW THROUGH SAID VALVE MEANS, POSITIONING MEANS FOR MAINTAINING SAID VALVE MEANS IN SAID SIDE POCKET SO AS TO MAINTAIN SAID LOWER CIRCULATING PORT MEANS IN FLOW COMMUNICATION WITH SAID FIRST PORT MEANS WHEN SAID CIRCULATING DEVICE IS OPEN, BUT PERMITTING SAID ELONGATED MEMBER TO SLIDE LONGITUDINALLY WITHIN SAID SIDE POCKET WHEN A PRESELECTED PRESSURE DIFFERENTIAL IS ESTABLISHED ACROSS SAID DEVICE TO BREAK SAID FLOW COMMUNICATION, SEALING MEANS COOPERATING WITH SAID ELONGATED MEMBER ADJACENT SAID FIRST PORT MEANS TO EFFECTIVELY SEAL SAID SIDE POCKET FROM THE EXTERIOR OF SAID MANDREL UPON BREAKING OF SAID FLOW COMMUNICATION, AND LATCH MEANS FOR LATCHING SAID VALVE MEANS IN PLACE IN SAID SIDE POCKET TO MAINTAIN SAID SEAL.
Claim 2
Dependent Claim
205 words
A DOWN-HOLE CIRCULATING DEVICE WHICH COMPRISES: A SIDE-POCKET MANDREL ADAPTED TO BE POSITIONED IN A STRING OF WELL TUBING, FIRST PORT MEANS IN SAID MANDREL, COMMUNICATING THE SIDE POCKET OF SAID MANDREL WITH THE EXTERIOR OF SAID MANDREL, VALVE MEANS ADAPTED TO BE POSITIONED IN SAID SIDE POCKET, SAID VALVE MEANS COMPRISING AN ELONGATED MEMBER HAVING A LONGITUDINAL CAVITY THEREIN, LOWER CIRCULATING PORT MEANS AND UPPER CIRCULATING PORT MEANS IN COMMUNICATION WITH SAID CAVITY, CHECK VALVE MEANS POSITIONED BETWEEN SAID UPPER AND LOWER CIRCULATING PORT MEANS TO UNIDIRECTIONALLY CONTROL THE FLUID FLOW THROUGH SAID VALVE MEANS, POSITIONING MEANS FOR MAINTAINING SAID VALVE MEANS IN SAID SIDE POCKET SO AS TO MAINTAIN SAID LOWER CIRCULATING PORT MEANS IN FLOW COMMUNICATION WITH SAID FIRST PORT MEANS WHEN SAID CIRCULATING DEVICE IS OPEN, BUT PERMITTING SAID ELONGATED MEMBER TO SLIDE LONGITUDINALLY WITHIN SAID SIDE POCKET WHEN A PRESELECTED PRESSURE DIFFERENTIAL IS ESTABLISHED ACROSS SAID DEVICE TO BREAK SAID FLOW COMMUNICATION, SEALING MEANS COOPERATING WITH SAID ELONGATED MEMBER ADJACENT SAID FIRST PORT MEANS TO EFFECTIVELY SEAL SAID SIDE POCKET FROM THE EXTERIOR OF SAID MANDREL UPON BREAKING OF SAID FLOW COMMUNICATION, AND LATCH MEANS FOR LATCHING SAID VALVE MEANS IN PLACE IN SAID SIDE POCKET TO MAINTAIN SAID SEAL.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |