Boring or penetrating the earth – With signaling – indicating – testing or measuring
Patent
1987-05-06
1989-02-21
Marcus, Michael S.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
175 64, 436 25, 436 81, 436120, 436178, G01N 3102, G01N 3324
Patent
active
048057088
ABSTRACT:
The concentration of unspent zinc-based hydrogen sulfide scavenger in an oil-based drilling fluid is controlled by selectively dissolving and extracting the unspent scavenger in a solvent, such as glacial acetic acid, separating the aqueous solution, measuring the concentration of dissolved zinc in the aqueous solution, for example, with an X-ray fluorescence spectrograph, and utilizing the results of the measurements to proportion the extent of changes in concentration of the scavenger in the drilling fluid.
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patent: 4252655 (1981-02-01), Carney
patent: 4658914 (1987-04-01), Matza et al.
"H.sub.2 S Detector Aids Drilling", by Steven H. Calmer, The analysts, Inc., Houston, Tex.; Oil & Gas Journal, Nov. 19, 1979.
"Chemical Scavengers for Sulfides in Water-Base Drilling Fluids", R. L. Garrett et al, Journal of Petroleum Technology, Jun. 1979.
Khristoforov, B. S., Krivospitskii, O. I., "Separate Determination of Metallic Zinc and Zinc Sulfide in Mixtures by Means of Iron (III) Chloride," Chemical Abstracts, vol. 72, 1970.
Sandell, E. B., "Colorimetric Determination of Traces of Metals," Interscience Publishers, Inc., NY, NY, Chapter XLVIIm pp. 449-450.
Hawley, G. G., The Condensed Chemical Dictionary, Tenth Edition, pp. 1106-1113, Van Nostrand and Reinhold Company publishers.
Carney, L. L., Jones, B., "Practical Solutions to Combat the Detrimental Effects of Hydrogen Sulfide During Drilling Operations," 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.
Ellington William E.
Fleming, III Henry C.
Matza Stephen D.
Marcus Michael S.
Shell Oil Company
Wolfs Denise Y.
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