Salt recrystallization inhibitor for oil and gas well and preparation method of salt recrystallization inhibitor
An inhibitor and recrystallization technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as rock loss, stuck drilling, and reduced well diameter, and achieve increased solubility, prevention of salt sticking, and prevention of pump sticking. Effect
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Embodiment 1
[0026] Take 100% of the total volume of each component: 60 parts of trisodium nitrilotriacetate, 35 parts of sodium sulfide, 2 parts of molybdate, and 3 parts of polyquaternary ammonium; add them to the reaction kettle in turn; react at 60 ° C ; The product obtained by the reaction synthesis is dried; the dried product is pulverized to obtain a light yellow powder, which is a salt recrystallization inhibitor for oil and gas wells.
Embodiment 2
[0028] Take 100% of the total volume of each component: 65 parts of sodium methylglycine diacetate, 27 parts of ammonium fluoride, 5 parts of tungstate, and 3 parts of sodium formate; add them to the reaction kettle in turn; react at 50 ° C; The product obtained by the reaction synthesis is dried; the dried product is pulverized to obtain a light yellow powder, which is a salt recrystallization inhibitor for oil and gas wells.
Embodiment 3
[0030] Take 100% of the total volume of each component: 70 parts of tetrasodium ethylenediaminetetraacetic acid, 23 parts of ammonium fluoride, 3 parts of polyphosphate, 4 parts of potassium formate; add them to the reaction kettle in sequence; carry out at 70 °C Reaction; drying the product obtained by the reaction synthesis; pulverizing the dried product to obtain a light yellow powder, which is a salt recrystallization inhibitor for oil and gas wells.
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