Pulsed ultrasonic doppler borehole fluid measuring apparatus
US4947683A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Aug 3, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P5/244
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring device for use in a producing well is set forth. It includes a sonde having upper and lower centralizers to define an annular flow space therearound. In the preferred embodiment, a motor driven sensor preferably a piezoelectric combination transmitter and receiver is, included to transmit and then receive ultrasonic pulses. They are transmitted downwardly from the housing into fluid flowing in the well. Reflective interfaces are defined by material differences. Gas bubbles droplets and particles in the fluid flow and phases between oil and water, etc. form reflective interfaces to create a scattering effect to transmitted ultrasonic pulses so that a return pulse is formed. The pulses encodes fluid flow velocity as a result of the Doppler shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.