Method of using dithiazines and derivatives thereof in the treatment of wells
View Patent ↗Corrosion of metallic tubulars in an oil, gas or geothermal well may be inhibited by introducing into the well a dithiazine derivative of the formula: wherein R 14 is a C 1 -C 24 straight chain or branched alkyl group; or a C 6 -C 24 aryl or arylalkyl group; R 15 is a C 1 -C 6 alkyl or a C 6 -C 30 aryl or alkylaryl group; and X is chlorine, bromine or iodine. The dithiazine may be isolated from a whole spent fluid (WSF) formed by reaction of hydrogen sulfide and a triazine. Alternately, the whole spent fluid containing dithiazine or dithiazine derivative and a corrosion inhibiting formulation may be used to inhibit corrosion in the well.
1. A method of inhibiting corrosion during the treatment of a subterranean formation which comprises introducing into a gas or oil well a corrosive inhibiting effective amount of a dithiazine of the formula:
wherein:
R 14 is a C 1 -C 24 straight chain or branched alkyl group; or a C 6 -C 24 aryl or arylalkyl group;
R 15 is a C 1 -C 6 alkyl or a C 6 -C 30 aryl or alkylaryl group; and
X is chlorine, bromine or iodine.
2. The method of claim 1 , wherein R 14 is a C 1 -C 12 straight chain or branched alkyl group.
3. The method of claim 1 , wherein X is —Cl.
4. The method of claim 1 , wherein the dithiazine is of formula (IV).
5. The method of claim 4 , wherein R 14 is methyl.
6. The method of claim 1 , wherein the dithiazine is of formula (V).
7. The method of claim 6 , wherein R 15 is benzyl or naphthylmethyl.
8. The method of claim 7 , wherein R 14 is methyl.
9. The method of claim 1 , wherein R 14 is methyl or phenyl.
10. The method of claim 8 , wherein R 15 is benzyl.
11. The method of claim 9 , wherein R 14 is methyl.
12. The method of claim 4 , wherein R 14 is phenyl.