Pulsation dampener
US4299253A · kind A · utility
20Cited by
7References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Nov 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L19/0609
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pulsation dampener providing high attenuation in a narrow quiet band or frequency. The pulsation dampener is tuned to provide a reflected wave 180.degree. out of phase in the narrow band to cancel the undesired pulsation. A silicone polymer contained by a diaphragm is used as the dampening fluid. The pulsation dampener operation is virtually unaffected by changes in working fluid pressure or density. The latter aspect makes the pulsation dampener particularly well suited for use in well drilling operations where pressure pulses in the drilling fluid are used to transmit information to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.