US3202213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cementing large diameter casings
Assignee: Pan American Petroleum Corp
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Filing: 1963-06-26
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Granted: 1965-08-24
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Expires: 1983-06-26
Abstract
No abstract record available.
Inventors
- 👤 George C Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:47
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
IN THE CEMENTING OF LARGE DIAMETER CASING IN A BORE HOLE, THE METHOD COMPRISING INTRODUCING A CEMENT SLURRY AT MULTIPLE POINTS INTO AN ANNULAR SPACE EXTERIOR OF A CASING STRING POSITIONED IN A BORE HOLE, SAID POINTS BEING SPACE AROUND THE PERIPHERY OF SAID CASING AND NEAR THE END THEREOF AWAY FROM THE SURFACE OPENING OF SAID BORE HOLE, AND SEPARATELY PUMPING A PLURALITY OF INDIVIDUAL STREAMS OF SAID CEMENT, EACH OF SAID STREAMS BEING PUMPED TO A CORRESPONDING ONE OF SAID SPACED POINTS UNDER PRESSURE TO FILL AT LEAST A PORTION OF SAID ANNULAR SPACE ALONG THE LENGTH OF SAID CASING, WHILE MAINTAINING THE FLOW RATES OF ALL OF SAID STREAMS SUBSTANTIALLY EQUAL, WHEREBY UNIFORM DISTRIBUTION OF SAID CEMENT IN SAID ANNULAR SPACE IS ACHIEVED.
Claim 2
Dependent Claim
126 words
IN THE CEMENTING OF LARGE DIAMETER CASING IN A BORE HOLE, THE METHOD COMPRISING INTRODUCING A CEMENT SLURRY AT MULTIPLE POINTS INTO AN ANNULAR SPACE EXTERIOR OF A CASING STRING POSITIONED IN A BORE HOLE, SAID POINTS BEING SPACE AROUND THE PERIPHERY OF SAID CASING AND NEAR THE END THEREOF AWAY FROM THE SURFACE OPENING OF SAID BORE HOLE, AND SEPARATELY PUMPING A PLURALITY OF INDIVIDUAL STREAMS OF SAID CEMENT, EACH OF SAID STREAMS BEING PUMPED TO A CORRESPONDING ONE OF SAID SPACED POINTS UNDER PRESSURE TO FILL AT LEAST A PORTION OF SAID ANNULAR SPACE ALONG THE LENGTH OF SAID CASING, WHILE MAINTAINING THE FLOW RATES OF ALL OF SAID STREAMS SUBSTANTIALLY EQUAL, WHEREBY UNIFORM DISTRIBUTION OF SAID CEMENT IN SAID ANNULAR SPACE IS ACHIEVED.
Claim 3
Dependent Claim
98 words
APPARATUS FOR CEMENTING CASING IN A BORE HOLE, WHICH APPARATUS COMPRISES A RELATIVELY LARGE DIAMETER ELONGATED TUBULAR ELEMENT HAVING A FIRST END AND A SECOND END AND HAVING MEANS FOR INSTALLING SAID TUBULAR ELEMENT IN A CASING STRING TO FORM A PORTION THEREOF; A PLURALITY OF ORIFICES POSITIONED NEAR SAID SECOND END AND SPACED AROUND THE PERIPHERY OF SAID TUBULAR ELEMENT IN A FIXED RELATIONSHIP TO ONE ANOTHER; EACH OF SAID ORIFICES COMMUNICATING WITH THE EXTERIOR OF SAID TUBULAR ELEMENT; A PLURALITY OF INDIVIDUAL SUPPLY CONDUITS, EACH CONNECTED TO A CORRESPONDING ONE OF SAID ORIFICES; AND A PLURALITY
Claim 4
Dependent Claim
98 words
APPARATUS FOR CEMENTING CASING IN A BORE HOLE, WHICH APPARATUS COMPRISES A RELATIVELY LARGE DIAMETER ELONGATED TUBULAR ELEMENT HAVING A FIRST END AND A SECOND END AND HAVING MEANS FOR INSTALLING SAID TUBULAR ELEMENT IN A CASING STRING TO FORM A PORTION THEREOF; A PLURALITY OF ORIFICES POSITIONED NEAR SAID SECOND END AND SPACED AROUND THE PERIPHERY OF SAID TUBULAR ELEMENT IN A FIXED RELATIONSHIP TO ONE ANOTHER; EACH OF SAID ORIFICES COMMUNICATING WITH THE EXTERIOR OF SAID TUBULAR ELEMENT; A PLURALITY OF INDIVIDUAL SUPPLY CONDUITS, EACH CONNECTED TO A CORRESPONDING ONE OF SAID ORIFICES; AND A PLURALITY
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |