Method of Using Dithiazines and Derivatives Thereof in the Treatment of Wells
AssigneeBaker Hughes Incorporated
InventorGrahame Nigel Taylor
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Abstract
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 R14 is a C1-C24 straight chain or branched alkyl group; or a C6-C24 aryl or arylalkyl group; R15 is a C1-C6 alkyl or a C6-C30 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.
Claims20
A dithiazine of the formula:
- wherein:
- R14 is a C1-C24 straight chain or branched alkyl group;
- or a C6-C24 aryl or arylalkyl group;
- R15 is a C1-C6 alkyl or a C6-C30 aryl or alkylaryl group;
- and
- X is chlorine, bromine or iodine.
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 mixture comprising:
- (a) a spent fluid containing a dithiazine or dithiazine derivative, the spent fluid having been formed by reaction of hydrogen sulfide and a triazine of the formula:
- wherein R is selected from the group consisting of a C1 to C10 saturated or unsaturated hydrocarbyl group or a C1 to C10 ω-hydroxy saturated or unsaturated hydrocarbyl group;
- and
- (b) a corrosion inhibiting formulation comprising at least one component selected from the group consisting of:
- (i) an alkyl, hydroxyalkyl, alkylaryl arylalkyl or arylamine quaternary salt;
- (ii) a mono or polycyclic aromatic amine salt;
- (iii) an imidazoline derivative;
- (iv) a mono-, di- or trialkyl or alkylaryl or arylalkyl phosphate ester;
- (v) a monomeric or oligomeric fatty acid or salt thereof;
- (vi) an alkyl or alkenyl substituted pyridinium;
- (vii) a polyamine amide;
- (viii) a polyhydroxy or alkoxylated amine or amide;
- (ix) a pyrazine derivative;
- and
- (x) mercaptocarboxylic acids.
Dependencies are inferred from the claim text.