A NEW HYDROGEN SULFIDE SCAVENGER FOR DRILLING FLUID AND ITS PREPARATION METHOD

The invention belongs to the technical field of removing hydrogen sulfide gas in drilling shaft, and discloses a new hydrogen sulfide scavenger for drilling fluid and its preparation method, and for the first time, ferrous gluconate organic compounds are used as sulfur removal reagent for drilling fluids; ferrous gluconate is a carbohydrate with high solubility, the dissolved ferrous ions react quickly with sulfur ions to form precipitate; as a carbohydrate, ferrous gluconate will not pollute the drilling fluid system and oil and gas reservoir; chemical experiment evaluation of ferrous gluconate and hydrogen sulfide gas will be used to determine the action law, the best action conditions and action mechanism of ferrous gluconate and hydrogen sulfide gas, can greatly reduce the harm concentration of hydrogen sulfide gas into the drilling shaft, reduce its corrosion to downhole drilling tools and provide theoretical basis and technical support for the exploitation of high-sulfur oil and gas reservoirs in China.