Borehole fluid density well logging means and method
US4939362A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Nov 28, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N9/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention is a density meter which includes a well logging sonde that is inserted into a borehole traversing an earthen formation. The sonde includes within it a source which emits gamma rays into the borehole fluid and a detector assembly which detects gamma rays from the borehole fluid and provides a count signal corresponding to a count of the detected gamma rays. A caliper is also located in the sonde and it continually measures the diameter of the borehole as the sonde moves through the borehole and provides a caliper signal corresponding to the diameter measurement. A cable connected to the detector assembly and to the caliper conveys the count signal and a caliper signal to the surface where surface electronics includes apparatus which processes the count signal and the caliper signal to provide a signal corresponding to the density of the fluid in the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.