Device for applying pulsed radial stresses to the wall of a well
US4699240A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 1, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | May 1, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for generating pulsed radial stresses to the wall of a well by application of pulses to anchorage shoes of a body lowered in the well, at the end of a cable provided with electric power supply and signal transmission lines. The device comprises hydraulic jacks for controlling the anchorage shoes, a main hydraulic system comprising an accumulator for placing the anchorage shoes in contact with the wall of the well and an auxiliary hydraulic system comprising an accumulator for applying short pulsed radial stresses to the anchorage shoes in the anchorage position. The hydraulic systems are electrically supplied through the cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.