Device for evaluating deformation characteristics of rocks in situ
Abstract
Abstract A DEVICE FOR MEASURING DEFORMATION CHARACTERISTICS OR ROCKS IS INSERTED INTO A BORE HOLE THEREIN AND A FLUID MEDIUM UNDER PRESSURE IS INTRODUCED BETWEEN A BODY OF THE DEVICE AND A SURROUNDING ENVELOPE TO PRESSURIZE THE WALLS OF THE BORE HOLES. A FEELER IS EXTENDED FROM THE BODY TO CONTACT THE WALL OF THE BORE TO FOLLOW ITS DEFORMATION UNDER THE ACTION OF THE FLUID MEDIUM AND A MEASURING DEVICE IS COUPLED TO THE FEELER TO MEASURE ITS DISPLACEMENT. THE MEASURING DEVICE IS RELEASED BY GRIPS WHEN MEASUREMENT IS BEING MADE SO AS TO BE FLOATING IN A CHAMBER IN THE BODY AND SUSPENDED BY THE FEELER FROM THE WALL OF THE BORE HOLE. THE CHAMBER IS FILLED WITH A DIELECTRIC LIQUID LIGHTER THAN WATER AND THE MEASURING DEVICE IS IN THE UPPER PORTION OF THE CHAMBER AND ABOVE AN APERTURE IN WHICH THE FEELER TRAVELS SO THAT IF WATER ENTERS THE CHAMBER THROUGH THE APERTURE, THE MEASURING DEVICE WILL REMAIN PROTECTED BY THE DIELECTRIC LIQUID.
Inventors
- 👤 Konstantin Vladimiro Ruppeneit
- 👤 Evgeny Semenovich Prigozhin
- 👤 Jury Rodionovich Perkov
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |