48 results about "Dithiosalicylic acid" patented technology

The invention discloses a self-adaptive cementing wall-fixing agent for drilling fluid as well as a preparation method and application of the self-adaptive cementing wall-fixing agent, and the wall-fixing agent comprises the following raw materials in percentage by weight: a main agent 1: 60-70% of polytetrahydrofuran; a main agent 2: 10 to 15% of isophorone diisocyanate; a main agent 3: 5-10% of 2, 2-dithiosalicylic acid; a solvent: 30 to 40% of N, N-dimethylformamide; a catalyst: 1 to 5% of dibutyltin dilaurate; a fine filler: 5-10% of superfine calcium; and an anti-sticking agent: 10-20% of soluble starch. The prepared cementing wall-fixing agent achieves self-repairing through reversible fracture and recombination of disulfide bonds, on the basis that elastomer polyurethane formed through reaction serves as an adhesive base material, a cementing group is introduced, a linear structure is formed through polymerization, the cementing characteristic can be brought into play, the self-adaptive plugging capacity is high, and the cementing wall-fixing agent can be directly added into a drilling fluid circulating system for use and has good application prospects. The well wall is stabilized in a high-temperature and high-pressure well, the strength of the well wall is improved, the on-site drilling construction requirement is met, and construction is easy.