US3229375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of surveying an inclined wellbore
Assignee: Shell USA Inc
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Filing: 1963-07-15
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Granted: 1966-01-18
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Wilfred S Crake
- 👤 Jr John B Cheatham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/022
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
IN A BOREHOLE HAVING THEREIN A DRILL STRING INCLUDING AN ECCENTRIC STABILIZER MOUNTED A KNOWN DISTANCE FROM A PORTION OF THE DRILL STRING WHICH IS CONCENTRIC WITH THE BOREHOLE, THE METHOD OF DETERMINING THE ORIENTATION OF THE ECCENTRIC STABILIZER COMPRISING: (A) DISPLACING A FIRST PORTION OF SAID DRILL STRING RELATIVE TO A CONCENTRIC PORTION BY MEANS OF THE ECCENTRIC STABILIZER; (B) MEASURING THE INCLINATION OF THE SECTION OF DRILL STRING BETWEEN SAID CONCENTRIC PORTION AND SAID DISPLACED PORTION; (C) ROTATING SAID ECCENTRIC STABILIZER 180 DEGREES; (D) DISPLACING SAID FIRST PORTION OF SAID DRILL STRING RELATIVE TO SAID CONCENTRIC PORTION BY MEANS OF THE ECCENTRIC STABILIZER; (E) MEASURING THE NEW INCLINATION OF THE SECTION OF DRILL STRING BETWEEN SAID CONCENTRIC PORTION AND SAID DISPLACED PORTION; AND, (F) DETERMINING THE ORIENTATION OF THE ECCENTRIC STABILIZER RELATIVE TO THE HIGH SIDE OF THE BOREHOLE FROM THE RELATIONSHIP
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |