US3376921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Completion of wells
Assignee: ExxonMobil Upstream Research Co
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Filing: 1966-07-08
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Granted: 1968-04-09
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Expires: 1986-07-08
Abstract
No abstract record available.
Inventors
- 👤 Charles W Manry
- 👤 Martin E Chenevert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:06
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/0415; E21B33/10; E21B33/13; E21B33/14; E21B47/00; E21B47/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
APPARATUS FOR USE WITH A PLURALITY OF WELL PIPE STRINGS IN A BOREHOLE AND A PIPE STRING ELEVATOR FOR VERTICALLY RECIPROCATING THE PIPE STRINGS, COMPRISING: A PLURALITY OF PIPE STRING SECTIONS FOR CONNECTING EACH OF SAID WELL PIPE STRINGS TO SAID PIPE STRING ELEVATOR; AT LEAST ONE STRAIN GAUGE TRANSDUCER ON EACH OF SAID PIPE STRING SECTIONS FOR PRODUCING AN ELECTRICAL INDICATION OF STRAIN IN SAID EACH PIPE STRING SECTION; MEANS FOR PRODUCING AN OUTPUT SIGNAL OF THE RELATIVE MAGNITUDES OF SAID ELECTRICAL INDICATION.
Claim 2
Dependent Claim
84 words
APPARATUS FOR USE WITH A PLURALITY OF WELL PIPE STRINGS IN A BOREHOLE AND A PIPE STRING ELEVATOR FOR VERTICALLY RECIPROCATING THE PIPE STRINGS, COMPRISING: A PLURALITY OF PIPE STRING SECTIONS FOR CONNECTING EACH OF SAID WELL PIPE STRINGS TO SAID PIPE STRING ELEVATOR; AT LEAST ONE STRAIN GAUGE TRANSDUCER ON EACH OF SAID PIPE STRING SECTIONS FOR PRODUCING AN ELECTRICAL INDICATION OF STRAIN IN SAID EACH PIPE STRING SECTION; MEANS FOR PRODUCING AN OUTPUT SIGNAL OF THE RELATIVE MAGNITUDES OF SAID ELECTRICAL INDICATION.
Claim 3
Dependent Claim
116 words
IN A PROCESS OF CEMENTING A PLURALITY OF PIPE STRINGS IN A BOREHOLE WHEREIN A QUANTITY OF CEMENT IS DEPOSITED THROUGH AT LEAST ONE OF THE PIPE STRINGS INTO THE LOWER PORTION OF THE BOREHOLE, THE IMPROVEMENT COMPRISING: VERTICALLY RECIPROCATING ALL OF THE PIPE STRINGS PRIOR TO CEMENTING, DURING CEMENT PLACEMENT AND WHILE THE CEMENT REMAINS IN A FLUID CONDITION; MEASURING THE STRAIN IN EACH OF SAID PIPE STRINGS; AND DISCONTINUING RECIPROCATION OF SAID PIPE STRINGS WHEN THE LOAD ON SAID PIPE STRINGS BECOMES UNBALANCED SUCH THAT THE LOAD ON ANY ONE OF SAID PIPE STRINGS BECOMES OF A VALUE TO EXCEED A PREDETERMINED FRACTION OF THE TENSILE STRENGTH OF SAID ONE OF SAID PIPE STRINGS.
Claim 4
Dependent Claim
116 words
IN A PROCESS OF CEMENTING A PLURALITY OF PIPE STRINGS IN A BOREHOLE WHEREIN A QUANTITY OF CEMENT IS DEPOSITED THROUGH AT LEAST ONE OF THE PIPE STRINGS INTO THE LOWER PORTION OF THE BOREHOLE, THE IMPROVEMENT COMPRISING: VERTICALLY RECIPROCATING ALL OF THE PIPE STRINGS PRIOR TO CEMENTING, DURING CEMENT PLACEMENT AND WHILE THE CEMENT REMAINS IN A FLUID CONDITION; MEASURING THE STRAIN IN EACH OF SAID PIPE STRINGS; AND DISCONTINUING RECIPROCATION OF SAID PIPE STRINGS WHEN THE LOAD ON SAID PIPE STRINGS BECOMES UNBALANCED SUCH THAT THE LOAD ON ANY ONE OF SAID PIPE STRINGS BECOMES OF A VALUE TO EXCEED A PREDETERMINED FRACTION OF THE TENSILE STRENGTH OF SAID ONE OF SAID PIPE STRINGS.
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) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |