Controlling sulfide scavenger content of drilling fluid

Details Controlling sulfide scavenger content of drilling fluid Controlling sulfide scavenger content of drilling fluid

1988-02-19

1990-09-25

Warden, Robert J.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

175 64, 436 25, 436 81, 436120, 436178, E21B 4400, E21B 4710, G01N 3102, G01N 3324

Patent

active

RE0333492

ABSTRACT:
The concentration of unspent zinc-based hydrogen sulfide scavenger in an aqueous drilling fluid is controlled by selectively extracting the unspent scavenger in a solvent, such as glacial acetic acid, measuring the concentration of dissolved zinc, for example, with an X-ray fluorescence spectrograph, and utilizing the results of the measurements to proportion the extent of changes to be made in the concentration of the scavenger.

REFERENCES:
patent: 3706532 (1972-12-01), Noll
patent: 3928211 (1975-12-01), Browning et al.
patent: 4252655 (1981-02-01), Carney
Calmer, Steven H., "H.sub.2 S Detector Aids Drilling Safety, Data", Oil & Gas Journal, Nov. 19, 1979, pp. 160-163.
Carney, Leroy L., and Jones, Bob, "Practical Solutions to Combat the Detrimental Effects of Hydrogen Sulfide During Drilling Operations", 1974, Society of Petroleum Engineers of AIME, Paper No. SPE 5198.
Garrett, R. L., "A New Field Method for the Quantitative Determination of Sulfides in Water-Base Drilling Fluids", Journal of Petroleum Technology, Sep., 1977, pp. 1195-1202.
Khristoforov et al., Chemical Abstracts, vol. 72, 1970, No. 96393r.
Sandell, "Colorimetric Determination of Traces of Metals", Interscience Publishers, Inc., New York, 1944, pp. 449-450.
The Condensed Chemical Dictionary, Tenth Edition, Van Nostrand Reinhold Co., New York, 1981, pp. 1106-1113.
Garrett et al., Journal of Petroleum Technology, Jun. 1979, pp. 787-796.

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