Downhole ultrasonic transit-time flowmetering means and method
US4982383A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1988 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Sep 30, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/662
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sonde in a well logging system of the present invention includes caliper means providing a diameter signal corresponding to the diameter of a borehole traversing an earth formation. First and second transducers which, when so controlled, transmit an ultrasonic acoustical pulse into fluid flowing in the borehole or provides an electrical pulse in accordance with a received acoustical pulse from the fluid. A control network controls both transducers so that during one part of a measurement the first transducer transmits an acoustical pulse into the fluid while the second transducer receives an acoustical pulse after it has passed through the fluid. During another part of the measurement the second transducer is controlled to transmit an acoustical pulse into the fluid while the first transducer is controlled to receive the acoustical pulse after it has passed through the fluid and provides a signal in accordance with the received acoustical pulse. A signal circuit connected to both transducers provides a travel time signal corresponding to the travel times of the acoustical pulses for both parts of the measurement. A conventional well logging cable carries control signals from the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.