US3587176A
Expired / Lapsed
US
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Apparatus for determination of the orientation of a moving member,particularly a drilling head
Assignee: Association des Ouvriers en Instruments de Precision
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Filing: 1968-08-12
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Granted: 1971-06-28
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Expires: 1988-08-12
Abstract
Abstract APPARATUS FOR DETERMINING THE PHYSICAL ORIENTATION OF A MOVING MEMBER, SUCH AS A DRILLING HEAD USED IN WELL DRILLING INCLUDING A PAIR OF PENKULUM UNITS CARRIED BY THE MOVING MEMBER, EACH BEING MOUNTED ORTHOGONALLY TO THE OTHER AND TO THE VERTICAL AXIS OF THE MEMBER, AND EACH ADAPTED TO TRANSMIT A SIGNAL REPRESENTATIVE OF ANGULAR INCLINATION TO THE HORIZONTAL. AN AZIMUTHAL DIRECTION SENSING DEVICE PROVIDES A SIGNAL REPESENTATIVE OF THE AZIMUTHAL ORIENTATION OF A PIVOT AXIS OF ONE OF THE PENDULUM UNITS. CALCULATING MEANS AND RELATED INSTRUMENTATION PROVIDE A RESULTANT SIGNAL REPRESENTATIVE OF THE AMOUNT AND DIRECTION OF INCLINATION OF THE MEMBER.
Inventors
- 👤 Pierre Schnerb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:29
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/16; E; E21; E21B; E21B47/00; E21B47/02; E21B47/022; E21B47/0236
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |