新型钻井液用润滑剂GXRH的研制

润滑剂GXRH是一种含高分子脂肪酸和脂化剂的聚酯化合物，亲油基团及亲水基团均为长链．使其在金属、岩石和粘土表面形成的吸附膜厚度增大，从而在高密度钻井液中能有较好的润滑性。该化合物具有较高的耐磨性。稳定性好，克服了天然脂肪酸易于水解、易与高价阳离子如钙、镁离子生成不溶性盐及在高密度钻井液中效能低等缺点，抗盐、抗温性能好。适用于各种钻井液体系，满足了高密度钻井液对润滑剂的要求。合成GXRH的原料为合成脂肪酸釜残。合成工艺简单，成本低；GXRH为直链化合物，无荧光。可降解达到环保要求。

Development of a novel drilling fluid lubricant GXRH

Drilling fluid lubricant GXRH is a kind of polyester compound containing macromolecule aliphatic acid and fat-forming agent, and both its hydrophilic group and lipophilic group are long chain, which in creases the thickness of adsorption film on the surface of metal, rock and clay, and therefore makes the high density drilling fluid to process good lubricity. This compound is suitable for various drilling fluid systems and can meet the requirements of high density drilling fluid on lubricity, as it has such advantages as higher grinding resistance, higher salt resistance, higher temperature tolerance and good stability; and it overcomes the disadvantages of the natural aliphatic acid as hydrating and forming insoluble salt with high valency cationic ions such as calcium ions and magnesium ions, and low efficiency in high density drilling fluid. The crude material of GXRH is the residue from aliphatic acid synthesis, and its technique is simple and cheap. As it is straight-chain compound and free of fluorescence, it is degradable and free of environment pollution.