G - Physics – 01 – V
Patent
G - Physics
01
V
324/13
G01V 3/08 (2006.01) E21B 47/10 (2006.01) E21B 49/00 (2006.01) G01N 27/403 (2006.01)
Patent
CA 2002450
ABSTRACT MONITORING DRILLING MUD COMPOSITION USING ION SELECTIVE ELECTRODES In the rotary drilling of oil wells a drilling mud is used both to transport the cuttings up to the surface and to impose an hydrostatic pressure on the walls of the borehole. For these functions the mud must for example have an acceptable density and viscosity. It is therefore important to monitor the characteristics of the mud, and to keep them within certain limits. Only recently, however, has drilling practice recognised the importance of monitoring the mud's ionic composition. The technique proposed involves the use of an ion selective/ion selective electrode pair to measure in the mud the potential of the selected ion pair, and so allow a determination of one ion's concentration. Thus, it is a method in which, using a selective/selective electrode pair, there is determined the potrntial difference generated by, and thus the concentration of, the two ions in the mud - and knowing the concentration of the second ion there may be computed that of the other (chosen) one.
Fletcher Philip
Jasinski Raymond
Fletcher Philip
Jasinski Raymond
Sedco Inc.
Smart & Biggar
Southeastern Commonwealth Drilling Ltd.
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