Centralizing and well-calipering apparatus for well tools
Abstract
Abstract THE PARTICULAR EMBODIMENTS DISCLOSED HEREIN AS REPRESENTATIVE OF THE PRESENT INVENTION ARE DIRECTED TO NEW AND IMPROVED APPARATUS FOR CENTRALIZING WELL TOOLS AND FOR MEASURING THE DIAMETERS OF WELL BORES. IN PARTICULAR, THE DISCLOSED EMBODIMENTS EACH EMPLOY A PLURALITY OF OUTWARDLY-BOWED UPRIGHT SPRINGS SPACED CIRCUMFERENTIALLY AROUND A BODY AND ADAPTED TO CONTACT THE WALL SURFACES OF A WELL BORE AND CORRESPONDINGLY FLEX LATERALLY INWARDLY AND OUTWARDLY IN UNISON AS THE APPARATUS ENCOUNTERS DIAMETRICAL CHANGES IN A WELL BORE FOR MAINTAINING THE TOOL CONCENTRICALLY POSITIONED THEREIN. INDEPENDENT INWARD FLEXURAL MOVEMENTS OF LESS THAN ALL OF THE BOWED SPRINGS ARE PREVENTED, HOWEVER, BY MOVEMENT-RESPONSIVE MEANS UNIQUELY ADAPTED TO EQUILATERALLY POSITION THE WALLENGAGING PORTIONS OF THE BOWED SPRINGS FOR ACCURATELY CENTRALIZING THE TOOL BODY IN A WELL BORE. IN AN ALTERNATIVE EMBODIMENT OF THE INVENTION, MEANS ARE FURTHER PROVIDED TO PRODUCE SIGNALS REPRESENTATIVE OF THE FLEXURAL MOVEMENTS OF THE BOWED SPRINGS FOR DERIVING DIAMETRICAL MEASUREMENTS OF A WELL BORE.
Inventors
- 👤 Walter E Cubberly Jr
Bibliographic Details
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |