Method for monitoring potassium chloride concentration in drilling fluids
US4546252A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1984 |
| Grant date | Oct 8, 1985 |
| Priority date | — |
| Expiry date | Jul 25, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The potassium chloride concentration of a drilling fluid is monitored during well drilling operations to identify any depletion in such concentration with time. Initially, the gamma radiation measuring apparatus utilized is calibrated by making gamma radiation measurements on self-shielded drilling fluid samples having successively increasing potassium chloride concentrations. A calibration constant is derived from the measured relationship between the potassium chloride concentrations of the various drilling fluid samples and their respective gamma radiation count rates. This calibration constant is then used along with the measured gamma radiation count rates from drilling fluid taken during well drilling operations to identify drilling fluid potassium chloride concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.