Patent US3322197A successfully refreshed from Google Patents.
US3322197A
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Cementing plug apparatus
Assignee: Halliburton Co
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Filing: 1965-06-11
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Granted: 1967-05-30
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 Eugene E Baker
- 👤 Gail M Boehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:04
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/05; Y; Y10; Y10T; Y10T137/00; Y10T137/4891
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A PLUG CONTAINER, PLUG RELEASE APPARATUS COMPRISING A PLUNGER, MEANS FOR MOUNTING SAID PLUNGER IN POSITION FOR SUPPORTING A CEMENTING PLUG IN SAID PLUG CONTAINER, SAID PLUNGER BEING LONGITUDINALLY MOVABLE IN SAID MOUNTING MEANS, LATCH MEANS FOR LOCKING SAID PLUNGER IN A PROJECTED POSITION, AND FLUID PRESSURE RESPONSIVE MEANS FOR RELEASING SAID LATCH MEANS AND RETRACTING SAID PLUNGER, WHEREBY A CEMENTING PLUG MAY BE RELEASED INTO A WELL CASING WHEN THE PLUNGER IS RETRACTED
Claim 2
Dependent Claim
75 words
IN A PLUG CONTAINER, PLUG RELEASE APPARATUS COMPRISING A PLUNGER, MEANS FOR MOUNTING SAID PLUNGER IN POSITION FOR SUPPORTING A CEMENTING PLUG IN SAID PLUG CONTAINER, SAID PLUNGER BEING LONGITUDINALLY MOVABLE IN SAID MOUNTING MEANS, LATCH MEANS FOR LOCKING SAID PLUNGER IN A PROJECTED POSITION, AND FLUID PRESSURE RESPONSIVE MEANS FOR RELEASING SAID LATCH MEANS AND RETRACTING SAID PLUNGER, WHEREBY A CEMENTING PLUG MAY BE RELEASED INTO A WELL CASING WHEN THE PLUNGER IS RETRACTED
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |