Monitoring drilling mud circulation

Details Monitoring drilling mud circulation Monitoring drilling mud circulation

1988-03-07

1989-02-28

Tokar, Michael J.

Measuring and testing

Borehole or drilling

Downhole test

166250, 175 42, 436 27, E21B 4908

Patent

active

048074691

ABSTRACT:
For monitoring drilling mud circulation there is incorporated in the supply mud a known amount or concentration of at least one tracer ion which is substantially non-interactive with the other mud components and with the strata drilled, and the return or circulatory mud is analyzed at the rig site (preferably by ion chromatography) for the non-interactive ion(s) to give an indication or annular dispersion. Preferably at least two tracer ions (e.g. a tracer compound providing a non-interactive cation and non-interactive anion) are used, these being analyzed independently in the return or circulatory mud to give separate checks on annular dispersion. Preferably the tracer is injected discontinuously into the supply mud, in spaced discrete relatively concentrated doses, and the residence time distribution of the tracer is plotted for each dose.

REFERENCES:
patent: 4352674 (1982-10-01), Fery
patent: 4397181 (1983-08-01), Caldwell
patent: 4447340 (1984-05-01), Fery
patent: 4507552 (1985-03-01), Roesner et al.
patent: 4722394 (1988-02-01), Wellington et al.

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