Device for generating sound pulses inside a well, by percussion
US4648478A · kind A · utility
20Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Jan 23, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for generating sound pulses in a well by a mobile mass striking against a target element integral with an elongate body anchored in a well by retractable shoes actuated by hydraulic cylinders. The mobile mass which slides in a first chamber in the body is moved away by a piston moving in a second chamber of the body and intermittently locked in the moved away position by a valve. The piston, the valve and also the hydraulic cylinders acting on the anchorage shoes are actuated by a hydraulic system which may be remote controlled from the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.